STAR VALLEY, WYO – The earthquake swarm just east of Soda Springs seems to have finally abated some. After first bubbling to life on September 2, and ringing up numerous measurable (2.5M+) tremblers for a 10-day period, the events have tapered since yesterday.
Scientists first thought the swarm would slack by the end of last week. Not only were they wrong, activity picked up. Sunday, September 10 was the most active day yet, with 47 quakes registering at least 2.5 in magnitude, including a pair of the biggest bangers to shake the region—a 4.9 at 3:47am and a 4.6 at 5:12am.
The biggest earthquake was on Day 1 (September 2) when a 5.3 shook some residents in the Star Valley area. The latest aftershocks, including a 4.7M at 7:26am on Monday, September 11, have been felt farther north in the southern portions of the Jackson Hole valley.
In all, the number of tremors 2.5M or larger is approaching 300. It’s been quiet since yesterday. Only one bump was recorded on September 12 (2.8M at 12:23pm) and a pair of 2.5M’s today. It may be over. It may be storing up for another run.