4.1-magnitude aftershock recorded near Stanley, shake felt in Boise
Some Boise residents felt an earthquake Tuesday morning after a shake was reported in the mountains, with the epicenter being located roughly nine miles northwest of Stanley.
The U.S. Geological Survey recorded a 4.1-magnitude earthquake around 7:54 a.m. Tuesday, according to its website. The USGS has recorded three shakes of over 2.5-magnitude in Idaho in the past 24 hours.
Aftershocks have been frequent around Idaho since a 6.5-magnitude earthquake shook multiple Western states on March 31, one of the strongest earthquakes ever recorded in the Gem State.
Tuesday’s aftershock was not the largest since the March earthquake, but it is the ninth aftershock of a 4-magnitude or higher since the March shake, according to the USGS. Other aftershocks were felt in Boise on May 13, April 20 and April 3.
The largest aftershock was a 4.8-magnitude shake recorded just a day after the main earthquake.
Following the March earthquake and subsequent aftershocks, avalanches were reported in the Sawtooths, as well as damaged buildings in Custer County. The earthquake and aftershocks also caused landslides that blocked roads.
Warmer weather revealed that the earthquakes caused a beach at Stanley Lake to collapse. The damage wasn’t recognized earlier because of the nearby snowpack and ice.
Aftershocks can follow larger earthquakes for a year or more, Andrew Michael, a geophysicist with the USGS, told the Statesman in April.
