Earthquake swarm of almost 2,500 tremors at Yellowstone supervolcano since June is one of the longest on record Prison Planet.com Posted on October 5, 2017 Posted in Aggregated No Comments Tagged with Sci Tech Daily Mail | An earthquake swarm at Yellowstone is now one of the biggest ever, with 2,475 tremors recorded since it began in in June. Share this:Share Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email