Over the past 3½ months, almost 2,500 earthquakes have been recorded in Yellowstone National Park.
The ongoing earthquake swarm, which started on June 12, now rivals a swarm in 1987, the longest swarm ever recorded at the massive supervolcano. During that swarm, more than 3,000 earthquakes struck the area in three months.
But don’t worry. “The swarm in no way signals an impending eruption,” reports newsweek.com
See more:
http://www.newsweek.com/yellowstone-supervolcano-earthquake-swarm-longest-ever-recorded-677387