M4.7 earthquake 35 km ENE of Mutsu, Japan
A magnitude 4.7 earthquake struck 35 km ENE of Mutsu, Japan on Tue, Oct 20, 1981, 5:46 PM JST (08:46 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.9 96 km ENE of Hachinohe, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb), light
- Local time
- UTC
- 1981-10-20 08:46:16 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 41.401° N, 141.611° 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
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 2 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 usp0001gk6. Read Tue, Sep 22, 2026, 7:42 AM UTC.