M1.7 earthquake 27km WSW of Lompoc, CA
A magnitude 1.7 earthquake struck 27km WSW of Lompoc, CA on Fri, May 29, 1987, 4:51 PM PDT (23:51 UTC), 5 km (3 mi) below the surface.
A larger quake followed: M2.6 26km SSW of Solvang, CA. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.7 (Mh), micro
- Magnitude from
- Southern California Seismic Network
- Local time
- UTC
- 1987-05-29 23:51:25 UTC
- Depth
- 5.3 km (3.3 mi), shallow
- Epicenter
- 34.531° N, 120.718° W
- Region
- California
- 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 2.5 km horizontally, 31.6 km in depth
- Depth from
- Operator assigned
- Station coverage gap
- 258°, poorly surrounded by stations
- Stations used
- 8
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 2 in the 30 days before it.
After
- 2.09km NNW of Los Alamos, CA · 14357 days ago · 5 km deep · 47 km away
- 2.626km SSW of Solvang, CA · 14349 days ago · 5 km deep · 50 km away
- 1.94km SSE of Santa Ynez, CA · 14311 days ago · 11 km deep · 60 km away
Before
Earthquakes todayCalifornia earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event ci723028. Read Thu, Oct 1, 2026, 11:10 PM UTC.