M4.3 earthquake 21 km E of Hakodate, Japan
A magnitude 4.3 earthquake struck 21 km E of Hakodate, Japan on Thu, Mar 12, 1987, 2:45 AM JST (17:45 UTC), 142 km (88 mi) below the surface.
A larger quake followed: M4.5 31 km NNW of Misawa, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mb), light
- Local time
- UTC
- 1987-03-11 17:45:02 UTC
- Depth
- 141.9 km (88.2 mi), intermediate-depth
- Epicenter
- 41.797° N, 140.999° E
- Region
- Japan
- 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.
- Depth from
- FROM_LOCATION
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0003375. Read Tue, Sep 22, 2026, 10:31 PM UTC.