M4.2 earthquake 84 km SE of Hasaki, Japan
A magnitude 4.2 earthquake struck 84 km SE of Hasaki, Japan on Sun, Sep 13, 1981, 5:18 AM JST (20:18 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.6 74 km SE of Hasaki, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mb), light
- Local time
- UTC
- 1981-09-12 20:18:36 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 35.129° N, 141.394° 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 1.5 and up: 4 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.674 km SE of Hasaki, Japan · 16444 days ago · 33 km deep · 16 km away
- 4.767 km SSE of Hasaki, Japan · 16431 days ago · 33 km deep · 18 km away
- 5.251 km E of ?hara, Japan · 16425 days ago · 38 km deep · 41 km away
- 4.449 km SE of Hasaki, Japan · 16405 days ago · 33 km deep · 37 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001fua. Read Tue, Sep 22, 2026, 10:23 PM UTC.