Every Volcano Wikidata Knows Screensaver
The Every Volcano Wikidata Knows screensaver shows active volcanoes by elevation, queried live against the Wikidata Query Service in SPARQL. The query is deliberately cheap: WDQS enforces a hard timeout and unbounded property paths blow through it, so this matches instance-of directly on an indexed property and returns in about a second. Elevations are only as good as the last editor to touch them. It's free, runs in your browser, and ESC exits.
How the Every Volcano Wikidata Knows screensaver works
The saver reads the source described above and draws it on a canvas — no account, no tracking.
Active volcanoes by elevation, queried live against the Wikidata Query Service in SPARQL. The query is deliberately cheap: WDQS enforces a hard timeout and unbounded property paths blow through it, so this matches instance-of directly on an indexed property and returns in about a second. Elevations are only as good as the last editor to touch them.
It refreshes on a schedule, so what you see stays current.
Colours can be changed in settings; nothing is stored beyond your own browser.
A worked example
Active volcanoes by elevation, queried live against the Wikidata Query Service in SPARQL. The query is deliberately cheap: WDQS enforces a hard timeout and unbounded property paths blow through it, so this matches instance-of directly on an indexed property and returns in about a second. Elevations are only as good as the last editor to touch them.
Settings & tips
- Accent and Background recolour the display.
- Every value on screen comes from the live source — nothing is simulated.
- Press ESC to leave fullscreen.
Frequently asked questions
- Is this real data?
- Yes — it comes from the source named on this page and is refreshed on a schedule.
- Is a key needed?
- No. This source is fully key-less.
- Is it free?
- Yes, and it runs entirely in your browser.