M2.7 earthquake 9 km NW of Alton, Utah
A magnitude 2.7 earthquake struck 9 km NW of Alton, Utah on Sun, Nov 22, 1987, 5:22 AM MST (12:22 UTC), 3 km (2 mi) below the surface.
A larger quake followed: M2.9 7 km E of Hildale, Utah. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.7 (md), micro
- Local time
- UTC
- 1987-11-22 12:22:15 UTC
- Depth
- 3.0 km (1.9 mi), shallow
- Epicenter
- 37.497° N, 112.560° W
- Region
- Utah
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 1.3 km horizontally, 3.8 km in depth
- Depth from
- From location
- Station coverage gap
- 168°
- Stations used
- 11
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 0 in the 30 days before it.
After
- 1.511 km NW of Alton, Utah · 14184 days ago · 6 km deep · 2 km away
- 2.55 km SW of Hatch, Utah · 14181 days ago · 6 km deep · 15 km away
- 1.813 km NW of Summit, Utah · 14155 days ago · 5 km deep · 61 km away
- 2.97 km E of Hildale, Utah · 14143 days ago · 4 km deep · 60 km away
- 2.99 km SW of Cedar City, Utah · 14143 days ago · 5 km deep · 52 km away
- 2.47 km NE of Cedar City, UT · 14143 days ago · -3 km deep · 52 km away
- 3.17 km N of Cane Beds, Arizona · 14143 days ago · 11 km deep · 61 km away
- 2.6Arizona · 14142 days ago · 5 km deep · 64 km away
- 2.413 km SSE of Minersville, Utah · 14127 days ago · 7 km deep · 73 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uu50034700. Read Tue, Sep 22, 2026, 12:19 PM UTC.