M2.9 earthquake 5 km N of Helper, Utah
A magnitude 2.9 earthquake struck 5 km N of Helper, Utah on Wed, Jul 15, 1987, 12:06 PM MDT (18:06 UTC), 1 km (1 mi) below the surface.
A larger quake followed: M3.2 15 km W of Huntington, Utah. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.9 (md), micro
- Local time
- UTC
- 1987-07-15 18:06:30 UTC
- Depth
- 1.1 km (0.7 mi), shallow
- Epicenter
- 39.737° N, 110.842° 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 1.1 km horizontally, 16.4 km in depth
- Depth from
- From location
- Station coverage gap
- 147°
- Stations used
- 14
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 2 in the 30 days before it.
After
- 2.68 km NW of Helper, Utah · 14295 days ago · 2 km deep · 8 km away
- 2.09 km NW of Helper, Utah · 14295 days ago · 3 km deep · 7 km away
- 1.61 km SSW of Charleston, Utah · 14291 days ago · 5 km deep · 96 km away
- 1.63 km NNW of Salem, Utah · 14289 days ago · 3 km deep · 82 km away
- 1.72 km SSE of Charleston, Utah · 14276 days ago · 1 km deep · 95 km away
- 1.95 km SSE of Wallsburg, Utah · 14258 days ago · 5 km deep · 82 km away
- 3.215 km W of Huntington, Utah · 14258 days ago · 6 km deep · 50 km away
- 2.014 km NNW of Orangeville, Utah · 14258 days ago · 12 km deep · 51 km away
Before
Earthquakes todayUtah earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uu50032905 (also filed as usp00036p4). Read Tue, Sep 22, 2026, 2:28 PM UTC.