tsunami.gov
U.S. Tsunami Warning Centers
Last scanned Aug 4, 2026, 10:00 PM · 11 views
Overall score
Great
Summary
This website uses PHP hosted on BBIL-AP - BHARTI Airtel Ltd., IN. SEO is fair (55/100) and accessibility is good (80/100). Security scores excellent (100/100) and performance excellent (90/100). Top issue: Missing meta description.
- United States
- Hosted on BBIL-AP - BHARTI Airtel Ltd., IN
Top issues to fix
8 issues found · 2 high priority
Missing meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
Missing OpenGraph tags
SEOAdd og:title/og:description/og:image so shared links render a proper preview card.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
+2 more issues — details in the sections below.
SEO
6 issue(s) found
Performance
269 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Score history
+7 overall since Jul 27, 2026
- Overall
- 80
- SEO
- 55
- Security
- 100
- Performance
- 90
- Accessibility
- 80
Organization
Company details published in this site's own structured data.
Contact
Email, phone, and address published on this site's own pages.
- ntwc@noaa.gov
Meta tags
- Title
- U.S. Tsunami Warning Centers
- Description
- Canonical
- Language
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=0.7, user-scalable=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- BBIL-AP - BHARTI Airtel Ltd., IN
- CDN provider
- —
- IP address
- 23.46.9.10
- ASN
- AS9498 (BBIL-AP - BHARTI Airtel Ltd., IN)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME |
|
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- weather.gov
- Valid from
- Aug 3, 2026
- Valid to
- Nov 1, 2026
- Days until expiry
- 88
- SAN domains
- amdar.ncep.noaa.gov, amdar.noaa.gov, amdarqa.ncep.noaa.gov, api.weather.gov, forecast.weather.gov, hads.ncep.noaa.gov, hadsqa.ncep.noaa.gov, inws.ncep.noaa.gov, inwsqa.ncep.noaa.gov, iris.ncep.noaa.gov, irisqa.ncep.noaa.gov, madis.ncep.noaa.gov, madisqa-data.ncep.noaa.gov, madisqa.ncep.noaa.gov, marine.weather.gov, ntwc.arh.noaa.gov, ntwc.ncep.noaa.gov, opengeo.ncep.noaa.gov, preview-api.weather.gov, preview-forecast.weather.gov, preview-marine.weather.gov, preview-opengeo.ncep.noaa.gov, preview-ra4-gifs.weather.gov, preview-radar.weather.gov, preview-spot.weather.gov, preview.weather.gov, ra4-gifs-idp.weather.gov, ra4-gifs.weather.gov, radar.weather.gov, ripcurrents.noaa.gov, spot.weather.gov, tsunami.gov, weather.gov, www.nws.noaa.gov, www.ripcurrents.noaa.gov, www.tsunami.gov, www.weather.gov, www.wrh.noaa.gov
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyEnabled
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 0 · H2 0 · H3 0
Links
106 internal · 29 external · 1 broken
Images
34 total · 4 missing alt
Scripts / Styles
81 scripts · 10 stylesheets
JS / CSS size
436 KB · 780 KB
Page size
48.6 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 10
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing meta description
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
- No H1 heading found
- Missing <html lang> attribute
Scan details
- Requested URL
- https://tsunami.gov
- Final URL
- https://www.tsunami.gov/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 269 ms
- HTML size
- 48.6 KB
- Redirect chain
- https://tsunami.gov → https://www.tsunami.gov/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does tsunami.gov use?
- tsunami.gov is built with PHP, jQuery, Google Analytics, Apache.
- Is tsunami.gov secure (HTTPS)?
- Yes. tsunami.gov uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Nov 1, 2026.
- Who hosts tsunami.gov?
- tsunami.gov is hosted on BBIL-AP - BHARTI Airtel Ltd., IN.
- What is tsunami.gov's SEO score?
- tsunami.gov scored 55/100 for SEO in the latest analysis (fair).
- What is tsunami.gov's overall website score?
- tsunami.gov has an overall SiteGraph score of 80/100, combining SEO, performance, security, and accessibility.
- Has tsunami.gov's score changed over time?
- tsunami.gov's overall score has improved by 7 points (from 73 to 80) since Jul 27, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card