M3.3 earthquake 6 km NNE of Magna, Utah
A magnitude 3.3 earthquake struck 6 km NNE of Magna, Utah on Wed, Mar 8, 1978, 11:30 PM MST (06:30 UTC), 9 km (6 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.3 (ml), minor
- Local time
- UTC
- 1978-03-09 06:30:51 UTC
- Depth
- 9.0 km (5.6 mi), shallow
- Epicenter
- 40.761° N, 112.081° W
- Region
- Utah
- Strongest shaking
- III, weak shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
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
- 1.1% of gravity
- Peak ground velocity
- -1.1 cm/s
- Map
- Automatic
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Stations used
- 28
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 2.57 km NNE of Magna, Utah · 17729 days ago · 7 km deep · 1 km away
- 2.8Utah · 17725 days ago · 13 km deep · 0 km away
Before
Earthquakes todayUtah earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000tab (also filed as ushis3466). Read Tue, Sep 22, 2026, 2:47 PM UTC.