#ultraviolet
Live, measured metrics for the hashtag #ultraviolet from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #ultraviolet
This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.
Day-by-day usage
measured · fosstodon.org (Mastodon public tags API) · fetched 2026-09-28 14:46 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · fosstodon.org (Mastodon public search API) · fetched 2026-09-28 14:46 UTCLive pulse
measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-09-28 14:46 UTCEverything below is measured over the latest 40 public posts (spanning ~5365 hours).
Posting hours (UTC) — busiest: 05:00
Languages: English (19) · French (1) · Dutch (1)
Avg boosts / post: 1.3
Top of the latest posts
🪱 NEW: Researchers in #Vienna found that the jaws of the ragworm 'Perinereis cultrifera' are made of #proteins bonded with metal ions including #zinc, producing a #material hard like metal yet elastic like #polymer. Other bristle #worms sw
Thunderstorms often illuminate the night sky with flashes of #lightning. They also seem to make treetops glow and sparkle—although the phenomenon is pretty much invisible to the naked eye. Now scientists have provided the first direct obser
Just binged the first (and unfortunately sole) season of #Ultraviolet (1998) with #IdrisElba. He plays a #vampire hunter. It's a British series that also stars #StephenMoyer from True Blood. It was a little slow but deserved more seasons.
What “ultraviolet” means
WikipediaUltraviolet radiation is electromagnetic radiation of wavelengths of 100–400 nanometers, shorter than that of visible light, but longer than X-rays. Wavelengths between 10 and 100 nanometers are called extreme ultraviolet and share some properties with soft X-rays. UV radiation is present in sunlight and constitutes about 10% of the total electromagnetic radiation output from the Sun. It is also produced by electric arcs, Cherenkov radiation, and specialized lights, such as mercury-vapor lamps,
“Ultraviolet” on Wikipedia (CC BY-SA) →#ultraviolet across platforms
every network with a public tag surfaceFollow #ultraviolet straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.
Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/ultraviolet