M 2.5 in Magna, Widely Felt In the Salt Lake Valley


University of Utah Seismograph Stations

Released: November 18, 2020 05:00 PM MST

The University of Utah Seismograph Stations reports that a small earthquake of magnitude 2.5 occurred this afternoon at 3:17 PM, November 18, 2020 (MST).  The shock was located 6.2 miles beneath the northwestern part of the Salt Lake Valley, 3 mi east northeast of the town of Magna, UT.  This earthquake was an aftershock of the magnitude 5.7 earthquake that occurred in the same area on March 18.  Today’s aftershock was felt by more than one hundred residents of the Salt Lake Valley. To date, the University of Utah Seismograph Stations has located 2,531 aftershocks from the March 18 earthquake, including 75 of magnitude 2.5 or larger and 40 of magnitude 3.0 and larger. In recent weeks there have been, on the average, approximately six aftershocks per week large enough to locate, most of them smaller than magnitude 2.0.  Aftershock activity is expected to continue for months, but with the rate continuing to decrease with time.

Anyone who felt the earthquake is encouraged to fill out a survey form on the US Geological Survey website: earthquake.usgs.gov.

Earthquake Summary:

Date (UTC):   November 18, 2020   Time (UTC):   22:17

Date (local): November 18, 2020   Time (local): 03:17 PM MST

Latitude: 40.7285° N

Longitude: 112.0663° W

Preferred magnitude: 2.5 Ml