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Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

34

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
/assets/palladium/production/s3fs-public/styles/carousel/...0.0 ms185.1 KiB
/assets/palladium/production/s3fs-public/styles/carousel/...0.0 ms145.6 KiB
/assets/palladium/production/s3fs-public/styles/carousel/...0.0 ms138.1 KiB
/assets/palladium/production/s3fs-public/styles/carousel/...0.0 ms121.1 KiB
www.usgs.gov/modules/custom/usgs_products/js/jquery.dataTables.js?v=1.0.00.0 ms112.7 KiB
www.usgs.gov/themes/custom/usgs_tantalum/css/styles.css?tduby00.0 ms106.1 KiB
/assets/palladium/production/s3fs-public/styles/carousel/...0.0 ms102.0 KiB
/assets/palladium/production/s3fs-public/styles/carousel/...0.0 ms71.2 KiB
/themes/custom/usgs_tantalum/assets/fonts/public-sans/Pub...0.0 ms32.2 KiB
/themes/custom/usgs_tantalum/assets/fonts/public-sans/Pub...0.0 ms32.2 KiB
/themes/custom/usgs_tantalum/assets/fonts/public-sans/Pub...0.0 ms32.1 KiB
/themes/custom/usgs_tantalum/assets/fonts/public-sans/Pub...0.0 ms32.0 KiB
www.usgs.gov/core/assets/vendor/jquery/jquery.min.js?v=3.7.10.0 ms30.0 KiB
www.usgs.gov/themes/custom/usgs_tantalum/assets/js/uswds.min.js?v=2.0.10.0 ms25.1 KiB
cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js604800.0 s251.1 KiB
/themes/custom/usgs_tantalum/assets/fonts/merriweather/La...0.0 ms21.5 KiB
/themes/custom/usgs_tantalum/assets/fonts/merriweather/La...0.0 ms21.2 KiB
/themes/custom/usgs_tantalum/assets/fonts/merriweather/La...0.0 ms21.1 KiB
/modules/custom/usgs_products/js/jquery.datetimepicker.fu...0.0 ms19.4 KiB
www.usgs.gov/core/misc/ajax.js?v=10.5.60.0 ms17.1 KiB
www.usgs.gov/core/misc/jquery.form.js?v=4.3.00.0 ms13.3 KiB
www.usgs.gov/themes/custom/usgs_tantalum/assets/js/slick.min.js?tduby00.0 ms10.6 KiB
/Universal-Federated-Analytics-Min.js?agency=DOI&subagenc...0.0 ms9.4 KiB
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/back-top.png0.0 ms8.7 KiB
www.usgs.gov/modules/custom/usgs_products/js/dataTables.buttons.min.js?v=1.0.00.0 ms8.4 KiB
www.usgs.gov/libraries/masonry/dist/masonry.pkgd.min.js?v=4.2.20.0 ms7.5 KiB
www.usgs.gov/modules/custom/usgs_products/js/buttons.html5.min.js?v=1.0.00.0 ms6.9 KiB
www.usgs.gov/core/misc/drupal.js?v=10.5.60.0 ms6.4 KiB
static.hotjar.com/c/hotjar-606685.js?sv=760.0 s6.3 KiB
www.usgs.gov/core/assets/vendor/jquery.ui/ui/widgets/resizable-min.js?v=10.5.60.0 ms5.9 KiB
www.usgs.gov/core/misc/position.js?v=10.5.60.0 ms5.9 KiB
www.usgs.gov/modules/contrib/extlink/js/extlink.js?v=10.5.60.0 ms5.8 KiB
www.usgs.gov/themes/custom/usgs_tantalum/usgs_logo.png0.0 ms5.3 KiB
www.usgs.gov/core/assets/vendor/jquery.ui/ui/widgets/draggable-min.js?v=10.5.60.0 ms5.2 KiB
/modules/contrib/improved_multi_select/js/improved_multi_...0.0 ms4.9 KiB
/modules/custom/usgs_products/css/jquery.datetimepicker.m...0.0 ms4.7 KiB
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js0.0 ms4.5 KiB
www.usgs.gov/core/assets/vendor/jquery.ui/ui/widgets/dialog-min.js?v=10.5.60.0 ms4.2 KiB
/modules/contrib/jquery_ui/assets/vendor/jquery.ui/ui/wid...0.0 ms4.2 KiB
www.usgs.gov/core/assets/vendor/jquery.ui/ui/widget-min.js?v=10.5.60.0 ms3.5 KiB
/modules/contrib/jquery_ui/assets/vendor/jquery.ui/ui/wid...0.0 ms3.5 KiB
/modules/contrib/jquery_ui/assets/vendor/jquery.ui/themes...0.0 ms3.4 KiB
www.usgs.gov/core/misc/dialog/dialog.ajax.js?v=10.5.60.0 ms3.4 KiB
www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/theme.css?tduby00.0 ms3.3 KiB
www.usgs.gov/modules/custom/usgs_products/css/jquery.dataTables.css?tduby00.0 ms3.2 KiB
/modules/custom/usgs_products/js/dataTables.fixedColumns....0.0 ms3.2 KiB
www.usgs.gov/core/misc/displace.js?v=10.5.60.0 ms3.0 KiB
www.usgs.gov/modules/custom/usgs_products/css/buttons.dataTables.min.css?tduby00.0 ms2.8 KiB
www.usgs.gov/core/assets/vendor/tabbable/index.umd.min.js?v=6.2.00.0 ms2.8 KiB
www.usgs.gov/core/misc/message.js?v=10.5.60.0 ms2.7 KiB
www.usgs.gov/themes/custom/usgs_tantalum/assets/js/dotdotdot.js?v=1.10.0 ms2.6 KiB
www.usgs.gov/themes/custom/usgs_tantalum/assets/js/usgs-tables.js?v=10.0 ms2.5 KiB
www.usgs.gov/core/assets/vendor/jquery.ui/ui/widgets/button-min.js?v=10.5.60.0 ms2.3 KiB
www.usgs.gov/themes/custom/usgs_tantalum/assets/js/usgs-tantalum.js?v=1.0.10.0 ms2.2 KiB
www.usgs.gov/themes/custom/usgs_tantalum/assets/js/print-only.js?tduby00.0 ms2.1 KiB
www.usgs.gov/core/misc/progress.js?v=10.5.60.0 ms2.0 KiB
www.usgs.gov/themes/custom/usgs_tantalum/assets/js/mobile-nav.js?v=10.0 ms2.0 KiB
www.usgs.gov/core/misc/announce.js?v=10.5.60.0 ms2.0 KiB
/core/assets/vendor/jquery.ui/ui/widgets/controlgroup-min...0.0 ms2.0 KiB
www.usgs.gov/core/assets/vendor/tua-body-scroll-lock/tua-bsl.umd.min.js?v=10.5.60.0 ms2.0 KiB
www.usgs.gov/core/misc/dialog/dialog.position.js?v=10.5.60.0 ms1.9 KiB
/core/assets/vendor/jquery.ui/ui/widgets/checkboxradio-mi...0.0 ms1.8 KiB
www.usgs.gov/core/misc/dialog/dialog.js?v=10.5.60.0 ms1.6 KiB
www.usgs.gov/core/assets/vendor/jquery.ui/ui/widgets/mouse-min.js?v=10.5.60.0 ms1.4 KiB
www.usgs.gov/themes/custom/usgs_tantalum/assets/js/usgs-tabs.js?v=10.0 ms1.4 KiB
www.usgs.gov/core/assets/vendor/loadjs/loadjs.min.js?v=4.3.00.0 ms1.3 KiB
www.usgs.gov/core/misc/dialog/dialog.jquery-ui.js?v=10.5.60.0 ms1.2 KiB
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/usa-icons/instagram.svg0.0 ms1.1 KiB
/modules/contrib/jquery_ui/assets/vendor/jquery.ui/themes...0.0 ms1.0 KiB
www.usgs.gov/core/assets/vendor/once/once.min.js?v=1.0.10.0 ms1.0 KiB
www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/core.css?tduby00.0 ms1.0 KiB
www.usgs.gov/core/misc/debounce.js?v=10.5.60.0 ms1.0 KiB
www.usgs.gov/modules/custom/usgs_filters/js/lazy-views-ajax-fix.js?tduby00.0 ms1.0 KiB
www.usgs.gov/themes/custom/usgs_tantalum/assets/js/usgs-carousel.js?v=4.1.00.0 ms1.0 KiB
/modules/contrib/improved_multi_select/css/improved_multi...0.0 ms1.0 KiB
www.usgs.gov/core/modules/system/css/components/hidden.module.css?tduby00.0 ms1015 B
www.usgs.gov/themes/contrib/uswds_base/js/messages.js?tduby00.0 ms1003 B
www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/button.css?tduby00.0 ms994 B
www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/dialog.css?tduby00.0 ms960 B
www.usgs.gov/core/misc/dialog/dialog-deprecation.js?v=10.5.60.0 ms936 B
www.usgs.gov/core/assets/vendor/jquery.ui/ui/focusable-min.js?v=10.5.60.0 ms927 B
www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/controlgroup.css?tduby00.0 ms885 B
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/search.png0.0 ms874 B
www.usgs.gov/core/assets/vendor/jquery.ui/ui/form-reset-mixin-min.js?v=10.5.60.0 ms872 B
/modules/contrib/jquery_ui/assets/vendor/jquery.ui/themes...0.0 ms871 B
www.usgs.gov/core/misc/drupal.init.js?v=10.5.60.0 ms867 B
www.usgs.gov/core/modules/ckeditor5/js/ckeditor5.dialog.fix.js?v=10.5.60.0 ms843 B
www.usgs.gov/core/misc/components/ajax-progress.module.css?tduby00.0 ms840 B
www.usgs.gov/modules/contrib/extlink/css/extlink.css?tduby00.0 ms834 B
www.usgs.gov/themes/custom/usgs_tantalum/assets/js/usgs-masonry.js?v=10.0 ms824 B
www.usgs.gov/core/assets/vendor/jquery.ui/ui/scroll-parent-min.js?v=10.5.60.0 ms822 B
www.usgs.gov/themes/custom/usgs_tantalum/assets/js/group-topic-view.js?v=10.0 ms812 B
www.usgs.gov/modules/custom/usgs_search/js/search_keywords_cleanup.js?v=1.x0.0 ms812 B
www.usgs.gov/core/assets/vendor/jquery.ui/ui/labels-min.js?v=10.5.60.0 ms807 B
www.usgs.gov/core/assets/vendor/jquery.ui/ui/keycode-min.js?v=10.5.60.0 ms770 B
www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/resizable.css?tduby00.0 ms769 B
www.usgs.gov/core/assets/vendor/jquery.ui/ui/disable-selection-min.js?v=10.5.60.0 ms767 B
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/icon-https.svg0.0 ms765 B
/modules/contrib/jquery_ui/assets/vendor/jquery.ui/ui/key...0.0 ms765 B
www.usgs.gov/core/misc/drupalSettingsLoader.js?v=10.5.60.0 ms762 B
www.usgs.gov/core/assets/vendor/jquery.ui/ui/unique-id-min.js?v=10.5.60.0 ms745 B
www.usgs.gov/core/assets/vendor/jquery.ui/ui/jquery-patch-min.js?v=10.5.60.0 ms743 B
/modules/contrib/jquery_ui/assets/vendor/jquery.ui/ui/uni...0.0 ms738 B
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/icon-dot-gov.svg0.0 ms734 B
www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/checkboxradio.css?tduby00.0 ms723 B
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/usa-icons/linkedin.svg0.0 ms716 B
www.usgs.gov/core/misc/components/progress.module.css?tduby00.0 ms712 B
www.usgs.gov/modules/custom/usgs_filters/js/usgs-chosen.js?tduby00.0 ms707 B
www.usgs.gov/core/modules/system/css/components/js.module.css?tduby00.0 ms705 B
www.usgs.gov/core/misc/jquery.tabbable.shim.js?v=10.5.60.0 ms697 B
www.usgs.gov/core/assets/vendor/jquery.ui/ui/plugin-min.js?v=10.5.60.0 ms690 B
www.usgs.gov/core/assets/vendor/jquery.ui/ui/data-min.js?v=10.5.60.0 ms687 B
www.usgs.gov/core/modules/system/css/components/system-status-counter.css?tduby00.0 ms675 B
www.usgs.gov/themes/custom/usgs_tantalum/assets/js/usgs-transcript.js?v=10.0 ms673 B
/core/modules/system/css/components/system-status-report-...0.0 ms667 B
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/usa-icons/youtube.svg0.0 ms666 B
www.usgs.gov/themes/custom/usgs_tantalum/assets/js/back-to-top.js?tduby00.0 ms661 B
www.usgs.gov/themes/custom/usgs_tantalum/assets/js/usgs-truncate.js?tduby00.0 ms646 B
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/usa-icons/x.svg0.0 ms605 B
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/usa-icons/facebook.svg0.0 ms603 B
/modules/contrib/jquery_ui/assets/vendor/jquery.ui/ui/saf...0.0 ms597 B
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/us_flag_small.png0.0 ms585 B
www.usgs.gov/core/modules/system/css/components/clearfix.module.css?tduby00.0 ms579 B
www.usgs.gov/core/modules/system/css/components/align.module.css?tduby00.0 ms576 B
www.usgs.gov/core/modules/system/css/components/tablesort.module.css?tduby00.0 ms569 B
/core/modules/system/css/components/reset-appearance.modu...0.0 ms544 B
www.usgs.gov/core/assets/vendor/jquery.ui/ui/version-min.js?v=10.5.60.0 ms542 B
/modules/contrib/jquery_ui/assets/vendor/jquery.ui/ui/ver...0.0 ms541 B
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/menu.png0.0 ms539 B
www.usgs.gov/modules/contrib/mathjax/js/config.js?v=10.5.60.0 ms538 B
/core/modules/system/css/components/system-status-report-...0.0 ms534 B
/core/modules/system/css/components/container-inline.modu...0.0 ms529 B
www.usgs.gov/core/modules/system/css/components/item-list.module.css?tduby00.0 ms517 B
www.usgs.gov/core/modules/system/css/components/resize.module.css?tduby00.0 ms516 B
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/usa-icons/expand_more.svg0.0 ms508 B
www.usgs.gov/core/modules/system/css/components/details.module.css?tduby00.0 ms479 B
www.usgs.gov/core/modules/system/css/components/nowrap.module.css?tduby00.0 ms463 B
/modules/contrib/responsive_table_filter/css/responsive-t...0.0 ms456 B
www.usgs.gov/core/modules/system/css/components/fieldgroup.module.css?tduby00.0 ms455 B
/core/modules/system/css/components/position-container.mo...0.0 ms452 B
www.usgs.gov/modules/contrib/paragraphs/css/paragraphs.unpublished.css?tduby00.0 ms429 B
www.usgs.gov/core/modules/ckeditor5/css/ckeditor5.dialog.fix.css?tduby00.0 ms428 B

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
/themes/custom/usgs_tantalum/assets/fonts/merriweather/La...465 ms
/themes/custom/usgs_tantalum/assets/fonts/public-sans/Pub...460 ms
/themes/custom/usgs_tantalum/assets/fonts/merriweather/La...440 ms
/themes/custom/usgs_tantalum/assets/fonts/public-sans/Pub...435 ms
/themes/custom/usgs_tantalum/assets/fonts/public-sans/Pub...430 ms
/themes/custom/usgs_tantalum/assets/fonts/merriweather/La...420 ms
/themes/custom/usgs_tantalum/assets/fonts/public-sans/Pub...420 ms
use.fontawesome.com/releases/v6.5.1/webfonts/fa-brands-400.woff2205 ms
use.fontawesome.com/releases/v6.5.1/webfonts/fa-regular-400.woff2205 ms
use.fontawesome.com/releases/v6.5.1/webfonts/fa-solid-900.woff2185 ms

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:29.536 source:map[column:22 line:19 type:source-location url:https://www.usgs.gov/core/misc/drupal.init.js?v=10.5.6 urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:69.657 source:map[type:text value:[unattributed]]] map[reflowTime:22.117 source:map[column:49615 line:1 type:source-location url:https://www.usgs.gov/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:4.309 source:map[column:50335 line:1 type:source-location url:https://www.usgs.gov/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:0.2 source:map[column:50393 line:1 type:source-location url:https://www.usgs.gov/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:0.149 source:map[column:50457 line:1 type:source-location url:https://www.usgs.gov/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:2.485 source:map[column:49637 line:1 type:source-location url:https://www.usgs.gov/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:0.276 source:map[column:51395 line:1 type:source-location url:https://www.usgs.gov/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 urlProvider:network]] map[reflowTime:0.084 source:map[column:2817 line:68 type:source-location url:https://www.usgs.gov/themes/custom/usgs_tantalum/assets/js/uswds.min.js?v=2.0.1 urlProvider:network]]]

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:3062.0810009765623 label:Time to first byte subpart:timeToFirstByte] map[duration:529.7079990234375 label:Resource load delay subpart:resourceLoadDelay] map[duration:976.766 label:Resource load duration subpart:resourceLoadDuration] map[duration:100.447 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-DIV
nodeLabel: NATIONAL NEWS RELEASE Prehistoric lake contributed to the birth of the Grand Ca…
path: 1,HTML,1,BODY,4,DIV,3,MAIN,1,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,1,DIV
selector: div.usgs-carousel > div.slick-list > div.slick-track > div#slick-slide10
snippet: <div class="paragraph--type--carousel-item slick-slide" style="background: url(&quot;https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladi…&quot;);" aria-label="Bidahochi Basin, dry bed of a prehistoric lake east of Flagstaff, Arizona.…" data-slick-index="0" aria-hidden="true" tabindex="-1" role="tabpanel" id="slick-slide10" aria-describedby="slick-slide-control10">

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-DIV
nodeLabel: NATIONAL NEWS RELEASE Prehistoric lake contributed to the birth of the Grand Ca…
path: 1,HTML,1,BODY,4,DIV,3,MAIN,1,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,1,DIV
selector: div.usgs-carousel > div.slick-list > div.slick-track > div#slick-slide10
snippet: <div class="paragraph--type--carousel-item slick-slide" style="background: url(&quot;https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladi…&quot;);" aria-label="Bidahochi Basin, dry bed of a prehistoric lake east of Flagstaff, Arizona.…" data-slick-index="0" aria-hidden="true" tabindex="-1" role="tabpanel" id="slick-slide10" aria-describedby="slick-slide-control10">

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLProtocol
www.usgs.gov/http/1.1
/assets/palladium/production/s3fs-public/styles/carousel/...http/1.1
/assets/palladium/production/s3fs-public/styles/carousel/...http/1.1
/assets/palladium/production/s3fs-public/styles/carousel/...http/1.1
/assets/palladium/production/s3fs-public/styles/carousel/...http/1.1
/assets/palladium/production/s3fs-public/styles/carousel/...http/1.1
/assets/palladium/production/s3fs-public/styles/carousel/...http/1.1

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
www.usgs.gov/themes/custom/usgs_tantalum/css/styles.css?tduby0106.1 KiB1.9 s
www.usgs.gov/modules/contrib/extlink/css/extlink.css?tduby0834 B711 ms
www.usgs.gov/modules/contrib/paragraphs/css/paragraphs.unpublished.css?tduby0429 B711 ms
/modules/contrib/jquery_ui/assets/vendor/jquery.ui/themes...3.4 KiB711 ms
/modules/custom/usgs_products/css/jquery.datetimepicker.m...4.7 KiB877 ms
www.usgs.gov/modules/custom/usgs_products/css/buttons.dataTables.min.css?tduby02.8 KiB711 ms
/modules/contrib/responsive_table_filter/css/responsive-t...456 B711 ms
/core/modules/system/css/components/system-status-report-...667 B711 ms
www.usgs.gov/modules/custom/usgs_products/css/jquery.dataTables.css?tduby03.2 KiB711 ms
www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/theme.css?tduby03.3 KiB711 ms
/core/modules/system/css/components/system-status-report-...534 B711 ms
/modules/contrib/jquery_ui/assets/vendor/jquery.ui/themes...1.0 KiB711 ms
www.usgs.gov/core/modules/system/css/components/resize.module.css?tduby0516 B711 ms
/modules/contrib/improved_multi_select/css/improved_multi...1.0 KiB711 ms
www.usgs.gov/core/modules/ckeditor5/css/ckeditor5.dialog.fix.css?tduby0428 B711 ms
www.usgs.gov/core/modules/system/css/components/system-status-counter.css?tduby0675 B711 ms
www.usgs.gov/core/modules/system/css/components/nowrap.module.css?tduby0463 B711 ms
www.usgs.gov/core/modules/system/css/components/js.module.css?tduby0705 B711 ms
www.usgs.gov/core/modules/system/css/components/tablesort.module.css?tduby0569 B711 ms
www.usgs.gov/core/modules/system/css/components/fieldgroup.module.css?tduby0455 B711 ms
www.usgs.gov/core/modules/system/css/components/item-list.module.css?tduby0517 B711 ms
/modules/contrib/jquery_ui/assets/vendor/jquery.ui/themes...871 B711 ms
/core/modules/system/css/components/reset-appearance.modu...544 B711 ms
www.usgs.gov/core/modules/system/css/components/align.module.css?tduby0576 B711 ms
/core/modules/system/css/components/position-container.mo...452 B711 ms
www.usgs.gov/core/misc/components/ajax-progress.module.css?tduby0840 B711 ms
www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/dialog.css?tduby0960 B1.0 s
www.usgs.gov/core/misc/components/progress.module.css?tduby0712 B711 ms
www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/checkboxradio.css?tduby0723 B1.0 s
www.usgs.gov/core/modules/system/css/components/hidden.module.css?tduby01015 B711 ms
www.usgs.gov/core/modules/system/css/components/clearfix.module.css?tduby0579 B711 ms
www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/button.css?tduby0994 B1.0 s
/core/modules/system/css/components/container-inline.modu...529 B711 ms
www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/resizable.css?tduby0769 B1.0 s
www.usgs.gov/core/modules/system/css/components/details.module.css?tduby0479 B711 ms
www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/controlgroup.css?tduby0885 B1.0 s
www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/core.css?tduby01.0 KiB711 ms
use.fontawesome.com/releases/v6.5.1/css/all.css24.4 KiB1.6 s

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
FEATURED STORY He Ahi, He ʻĀina: From Fire Comes Land Chronicling 75 years of e… div.usgs-carousel > div.slick-list > div.slick-track > div.paragraph--type--carousel-item
/assets/palladium/production/s3fs-public/styles/carousel/...184.7 KiB110.5 KiB
Critical Minerals The USGS leads national efforts to map mineral resources and… div.field > div.field-content > div.usgs-container__full-width > div.paragraph--type--full-width-section
/assets/palladium/production/s3fs-public/styles/carousel/...145.2 KiB71.0 KiB
NATIONAL NEWS RELEASE Prehistoric lake contributed to the birth of the Grand Ca… div.usgs-carousel > div.slick-list > div.slick-track > div.paragraph--type--carousel-item
/assets/palladium/production/s3fs-public/styles/carousel/...137.6 KiB63.4 KiB
Maps The USGS has over a century of experience producing maps and related info… div.field > div.field-content > div.usgs-container__full-width > div.paragraph--type--full-width-section
/assets/palladium/production/s3fs-public/styles/carousel/...120.8 KiB46.5 KiB
NATIONAL NEWS RELEASE New AI Tool Forecasts Drought 90 Days Ahead Nationwide Re… div.usgs-carousel > div.slick-list > div.slick-track > div.paragraph--type--carousel-item
/assets/palladium/production/s3fs-public/styles/carousel/...101.6 KiB27.3 KiB
Back to Top div.dialog-off-canvas-main-canvas > footer.usa-footer > div.usa-footer__return-to-top > a#back-to-top
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/back-top.png8.4 KiB7.7 KiB

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.6 s
URLTime Spent
usgs.gov/1.6 s
www.usgs.gov/0.0 ms

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.8 s
URLTime Spent
www.usgs.gov/1.9 s

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 170 ms 113.3 KiB
URLTransfer SizeEst Savings
www.usgs.gov/modules/custom/usgs_products/js/jquery.dataTables.js?v=1.0.0112.3 KiB78.2 KiB
www.usgs.gov/core/misc/ajax.js?v=10.5.616.7 KiB11.7 KiB
touchpoints.app.cloud.gov/touchpoints/5e10f821.js79.7 KiB9.6 KiB
www.usgs.gov/core/misc/jquery.form.js?v=4.3.012.9 KiB6.0 KiB
www.usgs.gov/core/misc/drupal.js?v=10.5.66.1 KiB4.8 KiB
www.usgs.gov/core/misc/position.js?v=10.5.65.5 KiB3.0 KiB

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 140 ms 175.4 KiB
URLTransfer SizeEst Savings
www.usgs.gov/themes/custom/usgs_tantalum/css/styles.css?tduby0105.8 KiB101.7 KiB
.fba-modal-dialog { font-family: Source Sans Pro Web, Helvetica Neue, Helvetica, Roboto, Arial, sa… } …52.1 KiB49.9 KiB
use.fontawesome.com/releases/v6.5.1/css/all.css24.0 KiB23.8 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 2.3 s 512.8 KiB
URLTransfer SizeEst Savings
cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js250.7 KiB121.7 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1147.2 KiB106.1 KiB
www.googletagmanager.com/gtm.js?id=GTM-KWRSKS135.7 KiB68.3 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L147.2 KiB61.2 KiB
www.googletagmanager.com/gtag/js?id=G-FH5X1PMV8C&cx=c&gtm=4e64h1157.0 KiB60.9 KiB
www.usgs.gov/modules/custom/usgs_products/js/jquery.dataTables.js?v=1.0.0112.3 KiB57.2 KiB
script.hotjar.com/modules.6a0f3932cb1341a35c18.js56.1 KiB37.5 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
Unattributable655 ms7.3 ms0.0 ms
www.usgs.gov/649 ms6.8 ms1.6 ms
cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js382 ms273 ms108 ms
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L313 ms275 ms38 ms
www.googletagmanager.com/gtm.js?id=GTM-KWRSKS306 ms248 ms30 ms
www.googletagmanager.com/gtag/js?id=G-FH5X1PMV8C&cx=c&gtm=4e64h1287 ms249 ms36 ms
www.usgs.gov/core/misc/drupal.init.js?v=10.5.6264 ms141 ms0.2 ms
touchpoints.app.cloud.gov/touchpoints/5e10f821.js177 ms70 ms52 ms
script.hotjar.com/modules.6a0f3932cb1341a35c18.js158 ms128 ms21 ms
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js96 ms92 ms1.7 ms
www.usgs.gov/themes/custom/usgs_tantalum/css/styles.css?tduby079 ms0.0 ms0.0 ms
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h174 ms28 ms46 ms
www.usgs.gov/core/assets/vendor/jquery/jquery.min.js?v=3.7.169 ms57 ms9.9 ms
www.usgs.gov/modules/custom/usgs_products/js/jquery.dataTables.js?v=1.0.065 ms26 ms39 ms
/Universal-Federated-Analytics-Min.js?agency=DOI&subagenc...53 ms48 ms3.3 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation1.8 s
Other846 ms
Style & Layout636 ms
Script Parsing & Compilation457 ms
Parse HTML & CSS183 ms
Rendering72 ms
Garbage Collection31 ms

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 5.6 KiB
URLTransfer SizeEst Savings
.fba-modal-dialog { font-family: Source Sans Pro Web, Helvetica Neue, Helvetica, Roboto, Arial, sa… } …52.1 KiB5.6 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js251.1 KiB
/assets/palladium/production/s3fs-public/styles/carousel/...185.1 KiB
www.googletagmanager.com/gtag/js?id=G-FH5X1PMV8C&cx=c&gtm=4e64h1157.1 KiB
use.fontawesome.com/releases/v6.5.1/webfonts/fa-solid-900.woff2153.5 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L147.3 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1147.2 KiB
/assets/palladium/production/s3fs-public/styles/carousel/...145.6 KiB
/assets/palladium/production/s3fs-public/styles/carousel/...138.1 KiB
www.googletagmanager.com/gtm.js?id=GTM-KWRSKS136.0 KiB
/assets/palladium/production/s3fs-public/styles/carousel/...121.1 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
Home div.usa-nav-container > div#logo > a.logo-img > img
www.usgs.gov/themes/custom/usgs_tantalum/usgs_logo.png
Agency logo div.usa-footer__logo > a > div.mobile-lg:grid-col-auto > img.usa-footer__logo-img
www.usgs.gov/themes/custom/usgs_tantalum/usgs_logo.png
U.S. flag header.usa-banner__header > div.usa-banner__inner > div.grid-col-auto > img.usa-banner__header-flag
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/us_flag_small.png
U.S. flag footer.usa-banner__header > div.usa-banner__inner > div.grid-col-auto > img.usa-banner__header-flag
touchpoints.app.cloud.gov/img/us_flag_small.png
Facebook div.usa-footer__social-links > div.grid-col-auto > a.usa-social-link > img.usa-social-link__icon
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/usa-icons/facebook.svg
Twitter div.usa-footer__social-links > div.grid-col-auto > a.usa-social-link > img.usa-social-link__icon
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/usa-icons/x.svg
YouTube div.usa-footer__social-links > div.grid-col-auto > a.usa-social-link > img.usa-social-link__icon
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/usa-icons/youtube.svg
Instagram div.usa-footer__social-links > div.grid-col-auto > a.usa-social-link > img.usa-social-link__icon
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/usa-icons/instagram.svg
LinkedIn div.usa-footer__social-links > div.grid-col-auto > a.usa-social-link > img.usa-social-link__icon
www.usgs.gov/themes/custom/usgs_tantalum/assets/img/usa-icons/linkedin.svg

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Layout shift culprits
●Optimize DOM size
●Optimize viewport for mobile
●User Timing marks and measures 18 user timings
●Avoid long main-thread tasks 16 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 180 ms
●Server Backend Latencies 550 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Avoid large layout shifts 1 layout shift found
○INP breakdown
○Avoid non-composited animations
96

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

ARIA

Focusable descendents within an `[aria-hidden="true"]` element prevent those interactive elements from being available to users of assistive technologies like screen readers. Learn how `aria-hidden` affects focusable elements.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Failing Elements
VOLCANO Great Sitkin ORANGE - WATCH 2026-04-20 19:59:32 (UTC) div#hp-carousel-0 > div.slick-list > div.slick-track > div.grid-col-4

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Latest Earthquake and Volcano Notifications div.api-carousel > div.grid-container > div.c-usgs-hp-api > h4
EARTHQUAKES div.tablet:grid-col-12 > div.paragraph--type--image-card > div.c-usgs-image-card > h4.d-title
INTRO TO MAPPING div.tablet:grid-col-12 > div.paragraph--type--image-card > div.c-usgs-image-card > h4.d-title
CORE SCIENCE SYSTEMS div.tablet:grid-col-12 > div.paragraph--type--image-card > div.c-usgs-image-card > h4.d-title
WHAT ARE CRITICAL MINERALS? div.tablet:grid-col-12 > div.paragraph--type--image-card > div.c-usgs-image-card > h4.d-title
ORDER A PASS div.tablet:grid-col-12 > div.paragraph--type--image-card > div.c-usgs-image-card > h4.d-title

These are opportunities to improve keyboard navigation in your application.

○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
●`[role]`s are contained by their required parent element
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●Input buttons have discernible text.
●Form elements have associated labels
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●`[accesskey]` values are unique
●`button`, `link`, and `menuitem` elements have accessible names
●ARIA attributes are used as specified for the element's role
●Elements use only permitted ARIA attributes
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links have a discernible name
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Skip links are focusable.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Elements with visible text labels have matching accessible names.
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○`<input type="image">` elements have `[alt]` text
○Links are distinguishable without relying on color.
○Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
○List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
100

Best Practices

●Uses HTTPS
●Avoids deprecated APIs
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No browser errors logged to the console
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Use a strong HSTS policy
○Mitigate clickjacking with XFO or CSP
92

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destinationLink Text
www.usgs.gov/news/science-snippet/loneliest-seismometers-earthRead More
/news/national-news-release/new-research-shows-prehistori...Read More
www.usgs.gov/news/featured-story/he-ahi-he-aina-fire-comes-landRead More
www.usgs.gov/news/science-snippet/loneliest-seismometers-earthRead More
/news/national-news-release/new-research-shows-prehistori...Read More
www.usgs.gov/news/featured-story/he-ahi-he-aina-fire-comes-landRead More
www.usgs.gov/news/science-snippet/loneliest-seismometers-earthRead More
www.usgs.gov/nmicLearn More

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links are crawlable
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`
○robots.txt is valid

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