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cisn.org screenshot

Report Summary

  • 65

    Performance

    Renders faster than
    78% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 87% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

cisn.org

CISN: Home

Page Load Speed

2.3 sec in total

First Response

205 ms

Resources Loaded

1.6 sec

Page Rendered

478 ms

cisn.org screenshot

About Website

Welcome to cisn.org homepage info - get ready to check CISN best content for United States right away, or after learning these important things about cisn.org

Visit cisn.org

Key Findings

We analyzed Cisn.org page load time and found that the first response time was 205 ms and then it took 2.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

cisn.org performance score

65

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.8 s

55/100

10%

LCP (Largest Contentful Paint)

Value42.6 s

0/100

25%

SI (Speed Index)

Value5.2 s

60/100

10%

TBT (Total Blocking Time)

Value10 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.6 s

81/100

10%

Network Requests Diagram

cisn.org

205 ms

www.cisn.org

379 ms

bootstrap.min.css

202 ms

main.css

202 ms

cisn_map_thumbnail.png

889 ms

Our browser made a total of 14 requests to load all elements on the main page. We found that 86% of them (12 requests) were addressed to the original Cisn.org, 7% (1 request) were made to Seismo.berkeley.edu and 7% (1 request) were made to Code.jquery.com. The less responsive or slowest element that took the longest time to load (1000 ms) belongs to the original domain Cisn.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 524.1 kB (6%)

Content Size

8.8 MB

After Optimization

8.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cisn.org main page is 8.8 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 15% of websites need less resources to load. Images take 8.6 MB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 9.0 kB

  • Original 11.7 kB
  • After minification 8.4 kB
  • After compression 2.7 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 3.3 kB, which is 28% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 9.0 kB or 77% of the original size.

Image Optimization

-4%

Potential reduce by 386.1 kB

  • Original 8.6 MB
  • After minification 8.2 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. CISN images are well optimized though.

JavaScript Optimization

-73%

Potential reduce by 27.2 kB

  • Original 37.0 kB
  • After minification 37.0 kB
  • After compression 9.9 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 27.2 kB or 73% of the original size.

CSS Optimization

-84%

Potential reduce by 101.8 kB

  • Original 121.5 kB
  • After minification 121.2 kB
  • After compression 19.7 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Cisn.org needs all CSS files to be minified and compressed as it can save up to 101.8 kB or 84% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

12

After Optimization

12

  • Images
  • JavaScript
  • CSS

The browser has sent 12 CSS, Javascripts, AJAX and image requests in order to completely render the main page of CISN. According to our analytics all requests are already optimized.

Network Requests Diagram

cisn.org

cisn.org

205 ms

www.cisn.org

www.cisn.org

379 ms

bootstrap.min.css

bootstrap.min.css

202 ms

main.css

main.css

202 ms

cisn_map_thumbnail.png

cisn_map_thumbnail.png

889 ms

CISN_logo.v1.png

CISN_logo.v1.png

269 ms

ShakeOut_Global_GetReady_728x90.png

ShakeOut_Global_GetReady_728x90.png

340 ms

ParkfieldDeformingBridgePlatesSign.JPG

ParkfieldDeformingBridgePlatesSign.JPG

1000 ms

shake_map_napa.jpg

shake_map_napa.jpg

340 ms

jquery.js

jquery.js

22 ms

bootstrap.min.js

bootstrap.min.js

332 ms

eew_kids_under_table.png

eew_kids_under_table.png

402 ms

Qingkai_holdphone.png

Qingkai_holdphone.png

603 ms

main_logo_banner_V3.png

main_logo_banner_V3.png

531 ms

Accessibility Review

cisn.org accessibility score

95

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

cisn.org best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

cisn.org SEO score

92

Search Engine Optimization Advices

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cisn.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Cisn.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

cisn.org

Open Graph description is not detected on the main page of CISN. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: