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

PRESS RELEASE

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

M 3.8 near Bedrock, CO

PRESS RELEASE

University of Utah Seismograph Stations

Released: November 08, 2020 06:30 AM MST

The University of Utah Seismograph Stations reports that a minor earthquake of magnitude 3.8 occurred at 04:19 AM on November 08, 2020 (MST).  The epicenter of the shock was located in western Colorado, 7 miles south-southeast of the town of Paradox, Colorado, and 40 mi southeast of the town of Moab, Utah.  This earthquake occurred within an area of frequent small, shallow earthquake activity triggered by underground saltwater injection.  A total of 10 earthquakes of magnitude 3.0 or greater have occurred within 15 miles of the epicenter of this event since 1997, including a magnitude 3.4 earthquake on September 16 of this year. The largest of these events was a magnitude 4.5 on March 4, 2019, which was in the same area as today’s earthquake.

Anyone who felt the earthquake is encouraged to fill out a survey form either on the Seismograph Stations website: www.quake.utah.edu or the US Geological Survey website: earthquake.usgs.gov.

Earthquake Summary:

Date (UTC):   November 08, 2020         Time (UTC):   11:19

Date (local): November 08, 2020         Time (local): 04:19 AM MST

Latitude:     38 16.29′ N

Longitude:    108 55.44′ W

Magnitude:    ML 3.8

M 2.3, widely felt near Magna, UT

PRESS RELEASE

University of Utah Seismograph Stations

Released: October 10, 2020 07:00 AM MDT

The University of Utah Seismograph Stations reports that a small earthquake of magnitude 2.3 occurred at 11:18 PM yesterday evening, October 9, 2020 (MDT).  The shock was located 6.6 miles beneath the northwestern part of the Salt Lake Valley, 2.9 mi E 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 hundreds of residents of the Salt Lake Valley. To date, the University of Utah Seismograph Stations has located 2,498 aftershocks from the March 18 earthquake, including 115 of magnitude 2.3 or larger and 40 of magnitude 3.0 and larger. In recent weeks there has been, on the average, approximately one aftershock per day 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):   October 10, 2020       Time (UTC):   05:18

Date (local): October 09, 2020       Time (local): 11:18 PM MDT

Latitude:     40 42.71′ N

Longitude:    112 3.24′ W

Preferred magnitude: 2.3 Ml