Sulphur Peak Earthquake Information

On September 02, 2017, in eastern ​Idaho ​near ​the ​town of ​Soda Springs a magnitude 5.3 earthquake was widely felt through our southeastern Idaho and Northern Utah.  Seismicity has continued to be very active including 158 earthquakes larger than M 3. These earthquakes occur slightly outside of the University of Utah Seismograph Stations area of responsibility, but the area is of interest to UUSS and the USGS Earthquake Hazards Program.

UUSS in partnership with USGS have deployed two UUSS 3-channel strong-motion systems and six USGS 6-channel seismic systems (broadband and strong-motion) within 5-40 km of the seismicity.  These stations can be seen on the map below as well as links to the webicorders for the temporary stations.

The following page includes information about the earthquake sequence and webicorders for the temporary stations.  We will update the page with more information over time.

Magnitude 5.3 near Soda Springs, ID

Press Release

University of Utah Seismograph Stations

Released: September 02, 2017 8:00 PM MDT

The University of Utah Seismograph Stations reports that a moderate
earthquake of magnitude 5.3 occurred at 05:57 PM on September 02, 2017
(MDT), as computed by the USGS. The epicenter of the shock was located
11 mi E of Soda Springs, ID. This event was preceded by a magnitude 4.3
foreshock and followed by numerous aftershocks, including seven with
magnitudes between 3.2 and 4.1 (all USGS magnitudes).
The 5.3 mainshock was reported felt in Idaho, Wyoming, and also across
northern Utah in the cities of Logan, Bringham City, Ogden, Salt Lake City,
Draper, and Provo.

Since 1962, a total of 87 earthquakes of magnitude 3.0 or greater have
occurred within 16 mi of the epicenter of today’s magnitude 5.3 event.
The largest of these events was a magnitude 4.7 on October 13, 1982,
9 mi NNW of Georgetown, ID.

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 (USGS parameters):

Date (UTC): September 02, 2017 Time (UTC): 23:57

Date (local): September 02, 2017 Time (local): 05:57 PM MDT

Latitude: 42 37.44′ N

Longitude: 111 23.46′ W

Preferred magnitude: 5.3 Mw