volcano.si.edu | Website SEO Review

Response time

6.03 s

File size

18.00 kB

Words

515

Media files

4

Number of links

65 internal / 5 external

Meta specifications 61% achieved

Title

(Critically important)

Smithsonian Institution - Global Volcanism Program: Worldwide Holocene Volcano and Eruption Information

The page title should be shorter than 580 pixels. It is 960 pixels long. Optimize title

There are no duplicate words in the title

Meta Title

Meta description

(Critically important)

The Global Volcanism Program (GVP) seeks better understanding of all volcanoes through documenting their eruptions--small as well as large--during the past 12,000 years. The range of volcanic behavior is great enough, and volcano lifetimes are long enough, that we must integrate observations of contemporary activity with historical and geological records of the recent past in order to prepare wisely for the future. The contemporary focus of the GVP is evident in the central role we play in the rapid dissemination of on-going eruption reports from local observers through our monthly Bulletin of the Global Volcanism Network. Our retrospective effort to document Earth's volcanic eruptions of the last 12,000 years has led to development of comprehensive databases and an archive of relevant maps, photos, and documents. Through these two complementary approaches we attempt to provide a context in which any individual volcano's benefits and dangers can be usefully assessed.

The meta description is too long: 6088 pixels from max. 1000 pixels. Optimize description

Meta Description

Crawlability

(Critically important)

There are no problems in accessing the website.

Search Engine Crawlers

Canonical URL

(Important)

No canonical link is specified.

Canonical Tag

Language

(Somewhat important)

Language detected in text: en

Language defined in HTML: en

Server location: United States of America

The following language is defined by HTML: en

Declaring language in HTML

Alternate/Hreflang Links

(Somewhat important)

There are no alternate links specified on this page.

Hreflang

Other meta tags

(Somewhat important)

There is no rel next meta tag on this page.

There is no rel prev meta tag on this page.

Meta Tags

Domain

(Somewhat important)

The domain is no subdomain.

The domain length is good.

The domain does not contain non-latin characters.

Domain for SEO

Page URL

(Somewhat important)

No parameters were found in the URL.

No session ID was found in the URL.

The URL does not have too many subdirectories.

SEO-friendly URLs

Charset encoding

(Somewhat important)

The charset encoding (UTF-8) is set correctly.

Character Encoding

Doctype

(Nice to have)

The doctype XHTML 1.1 is set correctly.

The doctype is placed at first in the HTML code.

HTML Doctype

Favicon

(Nice to have)

The favicon is linked correctly.

Favicon

Meta tags

Name	Value
Description	The Global Volcanism Program (GVP) seeks better understanding of all volcanoes through documenting their eruptions--small as well as large--during the past 12,000 years. The range of volcanic behavior is great enough, and volcano lifetimes are long enough, that we must integrate observations of contemporary activity with historical and geological records of the recent past in order to prepare wisely for the future. The contemporary focus of the GVP is evident in the central role we play in the rapid dissemination of on-going eruption reports from local observers through our monthly Bulletin of the Global Volcanism Network. Our retrospective effort to document Earth's volcanic eruptions of the last 12,000 years has led to development of comprehensive databases and an archive of relevant maps, photos, and documents. Through these two complementary approaches we attempt to provide a context in which any individual volcano's benefits and dangers can be usefully assessed.
Author	Smithsonian Institution
Keywords	gvp, volcano, volcanoes, volcanology, volcanism, eruption, eruptive, erupting, Holocene
DC.Title	Global Volcanism Program
DC.Title.Alternative	Smithsonian Institution's Global Volcanism Program
DC.Format.MIME	text/html
DC.Contributor.CorporateName	Smithsonian Institution. Global Volcanism Program.
DC.Publisher	Global Volcanism Program, National Museum of Natural History, MRC 119, Smithsonian Institution,
DC.Publisher.Place	Washington, DC:
DC.Date.Issued	1996-
DC.Description	The Global Volcanism Program (GVP) seeks better understanding of all volcanoes through documenting their eruptions during the past 12,000 years.
DC.Description.Summary	This site is the homepage for the Global Volcanism Program at the Smithsonian Institution. It provides current volcanic activity notices, historical volcanic activity reports published by the Smithsonian since 1968, and basic data about over 1500 Holocene volcanoes.
DC.Description.Contents	Volcanic Activity Reports -- Volcanoes of the World
DC.Identifier.URL	https://volcano.si.edu/
DC.Language	english
DC.Subject	volcano, volcanoes, volcanology, volcanism, eruption, eruptive, erupting, Holocene
DC.Relation.Requires	Mode of access: World Wide Web. Host: volcano.si.edu/
lang	en
twitter:site	@SmithsonianGVP
twitter:card	summary_large_image
og:site_name	Smithsonian Institution \| Global Volcanism Program
og:title	Global Volcanism Program
og:url	https://volcano.si.edu/
og:description	The Global Volcanism Program (GVP) seeks better understanding of all volcanoes through documenting their eruptions during the past 12,000 years.
og:type	website
og:image	https://volcano.si.edu/includes/images/GVP_LogoBanner.jpg
og:image:secure_url	https://volcano.si.edu/includes/images/GVP_LogoBanner.jpg
og:image:type	image/jpeg
og:image:alt	Smithsonian GVP Logo
Content-Type	application/xhtml+xml; charset=UTF-8

Page quality 60% achieved

Content

(Critically important)

Some words from the page title are not used within the pages content

The average number of words per sentence of 26.4 words is high.

This page contains 515 words. That's ok.

23.7% of the text are stop words.

The page contains a listing, which indicates a good text layout.

7 paragraphs were found on this page.

No placeholders texts or images were found.

There are no duplicates on the site.

Content is King

Frames

(Critically important)

This page does not use a frameset.

Frames and framesets

Mobile optimization

(Somewhat important)

No viewpoint tag is provided.

No Apple touch icon is specified.

This page loads 6 JavaScript files. This may affect the load time negatively.

Mobile Optimization

Bold and strong tags

(Somewhat important)

The usage of strong and bold tags is perfect. We recommend the use of up to 10 tags for this page.

Strong and Bold Tags

Image SEO

(Somewhat important)

2 images have no alt attribute. The content of alt attributes is used by search engines.

Image SEO

There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.

Social Sharing

Additional markup

(Nice to have)

No additional page markup was found.

HTTPS

(Somewhat important)

This website uses HTTPS to protect privacy and integrity of the exchanged data.

All included files are also transferred via HTTPS.

HTTPS

Media list

URL	Alt attribute	Title
/includes/images/GVP_logo.png	Logo link to homepage
/includes/images/volcano_icon_24.png	No alt attribute provided
/includes/images/volcano_icon_24.png	No alt attribute provided
/gallery/photos/GVP-12276.jpg	Volcano photo slideshow

Page structure 79% achieved

H1 heading

(Critically important)

There is no H1 heading specified.

H1-H6 headings

Headings

(Important)

The structure of headings is missing one or more levels. Do not skip heading levels.

H1-H6 headings

Heading structure

Heading level	Content
H3	Site & Database News
H3	Who We Are
H5	New Activity / Highlights
H5	Recent Bulletin Reports
H5	Frequently Asked Questions (more questions are available)

Link structure 25% achieved

Internal links

(Important)

Some internal links have dynamic parameters. All internal URLs, which are not marked as nofollow, should not contain dynamic parameters.

Some anchor texts are used more than once.

The number of internal links is ok.

None of the anchor texts is too long.

Internal Linking

External links

(Nice to have)

There are 5 external links on this page.

External Links

Found links on this page

Link	Attributes	Anchor text
https://volcano.si.edu/		IMG-ALT Logo link to homepage
/faq/Pacific_Ring_of_Fire.cfm		What volcanic regions form the "Pacific Ring of Fire"?
https://volcano.si.edu/		Home
/gvp_currenteruptions.cfm		Current Eruptions
/reports_weekly.cfm		Smithsonian / USGS Weekly Volcanic Activity Report
/reports_bgvn.cfm		Bulletin of the Global Volcanism Network
/projects/wvar20/		Weekly Report 20th Anniversary
/volcanolist_holocene.cfm		Holocene Volcano List
/search_volcano.cfm		Holocene Volcano Search
/search_eruption.cfm		Holocene Eruption Search
/volcanolist_pleistocene.cfm		Pleistocene Volcano List
/volcanolist_countries.cfm		Country Volcano Lists
/volcanolist_regions.cfm		Volcanic Regions List
/database/webservices.cfm		Webservices
/gvp_votw.cfm		Database Information
/gallery/ImageCollection.cfm		Image Collections
/gallery/VideoCollection.cfm		Video Collections
/gallery/ThemeCollection.cfm		Theme Collections
/gallery/KeywordCollection.cfm		Keyword Collections
/projects/StudentArtGallery/		Student Art Gallery 2024
/projects/sthelens40/		St. Helens 40th Anniversary
/faq/index.cfm		Frequent Questions
/resource_infosources.cfm		Information Sources
/ge/PlacemarkLinks.cfm		Google Earth Placemarks
/resource_dynamicplanet.cfm		This Dynamic Planet
https://volcano.si.edu/E3/		Eruptions, Earthquakes & Emissions Application
/faq/gvp_vnums.cfm		Volcano Numbers
/faq/gvp_volcano_naming.cfm		Volcano Naming
/gvp_contact.cfm		Contact Us
/gvp_cite.cfm		How to Cite
/gvp_about.cfm		About GVP
/gvp_termsofuse.cfm		Terms of Use
/reports_weekly.cfm		Kilauea
/reports_weekly.cfm		Lewotobi
/reports_weekly.cfm		Poas
/reports_weekly.cfm		Kirishimayama
/reports_weekly.cfm		Home Reef
/reports_weekly.cfm		Full Weekly Volcanic Activity Report
/gvp_currenteruptions.cfm		Current Eruptions (02 May 2025):
/faq/index.cfm?question=erupti...		Eruptions in 2025 (New/Total):
/faq/index.cfm?question=erupti...		Eruptions in 2024 (New/Total):
/faq/index.cfm?question=erupti...		Eruptions Avg 2010-2023 (N/T):
/volcano.cfm?vn=390020		Erebus
/volcano.cfm?vn=345020		Rincon de la Vieja
/volcano.cfm?vn=300250		Bezymianny
/volcano.cfm?vn=332010	Text duplicate	Kilauea
/volcano.cfm?vn=223020		Nyamulagira
/volcano.cfm?vn=255020		Bagana
/volcano.cfm?vn=273030		Mayon
/volcano.cfm?vn=284096		Nishinoshima
/volcano.cfm?vn=262000		Krakatau
/volcano.cfm?vn=263250		Merapi
/volcano.cfm?vn=357120		Villarrica
/volcano.cfm?vn=290380		Ebeko
/faq/index.cfm		questions
/faq/index.cfm?question=countries		What volcanoes and volcanic regions form the "Pacific Ring of Fire"?
/faq/index.cfm?question=countries		Which countries have the most volcanoes?
/faq/index.cfm?question=active...		How many volcanoes are erupting?
/faq/index.cfm?question=active...		How many Holocene volcanoes are there?
/faq/index.cfm?question=histor...		Has volcanic activity been increasing?
/faq/index.cfm?question=erupti...		What was erupting in the year...?
/faq/index.cfm?question=longes...		What volcanoes have had the longest eruptions?
/faq/index.cfm?question=popula...		What volcanoes have the most people living nearby?
/faq/index.cfm?question=eov_no...		What volcanoes are the most noteworthy?
https://volcano.si.edu/	Subdomain	Global Volcanism Program
https://mineralsciences.si.edu/	External Subdomain	Department of Mineral Sciences
https://naturalhistory.si.edu/	External Subdomain	National Museum of Natural History
https://www.si.edu/	External Subdomain	Smithsonian Institution
https://www.si.edu/termsofuse/	External Subdomain	© 2013 & Terms of Use A-TITLE Link to Copyright Notice and Terms of Use
https://www.si.edu/privacy/	External Subdomain	Privacy Policy A-TITLE Link to Privacy Notice

Server configuration 31% achieved

HTTP redirects

(Critically important)

This page redirects to "https://volcano.si.edu/"

WWW Redirect

HTTP header

(Important)

The HTML page should be transferred using GZip compression.

No X-Powered HTTP header is sent.

HTTP headers

Performance

(Somewhat important)

The page response time is very slow (6.03 seconds). The response time should be less than 0.4 seconds. Slow websites are bad for search engine bots and also result in bad user experience.

This page loads 4 CSS files. This may affect the page load time negatively.

This page loads 6 JavaScript files. This may affect the load time negatively.

The file size of the HTML document is fine (18 kB).

Page Speed

HTTP Response Header

Name	Value
content-type	text/html;charset=UTF-8
date	Tue, 03 Jun 2025 19:04:18 GMT
connection	close
set-cookie	161 Characters
statuscode	200
http_version	HTTP/1.1

External factors 100% achieved

Backlinks

(Critically important)

This page is referenced by wikipedia.

This website has excellent links from other websites.

This page has backlinks from 1,288 referring domains.

This page has 506,221 backlinks.

This page has backlinks from 513 different ip addresses.

Backlinks

Links from Wikipedia

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Robots.txt

User-agent: *
Disallow: /projects/provinces/
Disallow: /projects/eruptionstats/
Disallow: /projects/services/
Disallow: /projects/DailyReport/
Disallow: /projects/StudentArtGallery/

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volcano.si.edu

Smithsonian Institution - Global Volcanism Program: Worldwide Holoc...

The Global Volcanism Program (GVP) seeks better understanding of all volcanoes through documenting their eruptions--small as well as large--during the past 12,000 years. The range of volcanic behavior is great enough, and volcano lifetimes are long enough, that we must integrate observations of contemporary activity with historical and geological records of the recent past in order to prepare wisely for the future. The contemporary focus of the GVP is evident in the central role we play in the rapid dissemination of on-going eruption reports from local observers through our monthly Bulletin of the Global Volcanism Network. Our retrospective effort to document Earth's volcanic eruptions of the last 12,000 years has led to development of comprehensive databases and an archive of relevant maps, photos, and documents. Through these two complementary approaches we attempt to provide a context in which any individual volcano's benefits and dangers can be usefully assessed.

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

Keyword	Result	Recheck
Volcano	72%	Check
Holocene Volcano	59%	Check
Global	58%	Check
Global Volcanism	58%	Check
Global Volcanism Program	58%	Check
Volcanism	56%	Check
Program	53%	Check
Global Volcanism Network	53%	Check
Volcano List	52%	Check
Eruption Information	52%	Check
Activity	50%	Check
Database	50%	Check
Reports	50%	Check
Report	50%	Check
Bulletin	50%	Check
Recent	50%	Check
past 12	49%	Check
GVP	48%	Check
Volcanic Activity	48%	Check
Eruptions	46%	Check
Volcanoes	46%	Check
volcanic	46%	Check
Smithsonian	46%	Check
past	46%	Check
years	46%	Check

Show more keywords and terms

Volcano.si.edu - SEO Checker

Task list of SEO Improvements 12 Tasks

Meta specifications 61% achieved

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Page quality 60% achieved

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Media list

Page structure 79% achieved

(Critically important)

(Important)

Heading structure

Link structure 25% achieved

(Important)

(Nice to have)

Found links on this page

Server configuration 31% achieved

(Critically important)

(Important)

(Somewhat important)

HTTP Response Header

External factors 100% achieved

(Critically important)

Links from Wikipedia

Robots.txt

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