Utah earthquakes

M2.9 earthquake 4 km WSW of Richfield, Utah

A magnitude 2.9 earthquake struck 4 km WSW of Richfield, Utah on Thu, Feb 5, 2015, 12:27 AM MST (07:27 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M3.2 9 km S of Marysvale, Utah. This one was a foreshock.

Richfield forecast More in Utah

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude: 2.9 (ML, local (Richter)), micro
Magnitude from: University of Utah Seismograph Stations
Local time: Thu, Feb 5, 2015, 12:27 AM MST
UTC: 2015-02-05 07:27:26 UTC
Depth: 9.0 km (5.6 mi), shallow
Epicenter: 38.758° N, 112.127° W
Region: Utah
Felt reports: 38
Strongest shaking: III, weak shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
2.92	ML, local (Richter)	University of Utah Seismograph Stations	Preferred · Final · ±0.123 · 20 stations
2.9	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.123 · 20 stations

What happened

The USGS’s account of the effects of this earthquake.

Felt (III) at Richfield.

From the USGS event page for uu60101052. U.S. Geological Survey text and figures are in the public domain.

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: III, weak shaking
Peak ground acceleration: 144.0% of gravity
Peak ground velocity: 0.5 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

38 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 0.5 km horizontally, 1.0 km in depth
Magnitude uncertainty: ±0.12
Depth from: FROM_LOCATION
Station coverage gap: 43°
Stations used: 30

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 26 in the 60 days after this one and 21 in the 30 days before it.

After

Before

Earthquakes today Utah earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60101052 (also filed as usc000tlvm, nn00481072). Read Mon, Oct 5, 2026, 6:54 AM UTC.