#GW190521
Live, measured metrics for the hashtag #GW190521 from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #gw190521
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Day-by-day usage
measured · mastodon.online (Mastodon public tags API) · fetched 2026-10-12 09:23 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · mastodon.online (Mastodon public search API) · fetched 2026-10-12 09:23 UTCNo related tags with measured usage found for #gw190521.
Live pulse
measured · mastodon.online (Mastodon tag timeline) · fetched 2026-10-12 09:23 UTCEverything below is measured over the latest 13 public posts (spanning ~41193 hours).
Posting hours (UTC) — busiest: 09:00
Languages: German (9) · English (3) · Italian (1)
Avg boosts / post: 1.8
Top of the latest posts
On this day six years ago, the @LIGO and Virgo gravitational-wave detectors observed the signal GW190521. At the time it was their most massive and most distant binary black hole merger observed. The black-hole collision formed a 142 solar-
An diesem Tag vor sechs Jahren haben die Gravitationswellen-Detektoren von @LIGO und Virgo das Signal GW190521 beobachtet. Zu dieser Zeit war es die massereichste und entfernteste Verschmelzung zweier Schwarzer Löcher, die jemals beobachtet
Look at the current main story on nature.com! It's the recently published @mpi_grav researchers' work about a massive black hole's ringdown: ➡️ https://www.nature.com/articles/d41586-023-03813-w ℹ️ https://www.aei.mpg.de/749477/for-whom-the
#gw190521 across platforms
every network with a public tag surfaceFollow #gw190521 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/gw190521