M4.3 earthquake 42 km SE of Hasaki, Japan
A magnitude 4.3 earthquake struck 42 km SE of Hasaki, Japan on Sat, Apr 25, 1981, 2:13 AM JST (17:13 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.7 58 km SE of Katsuura, 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
- 1981-04-24 17:13:51 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 35.513° N, 141.221° 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: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.68 km ESE of Chiba, Japan · 16590 days ago · 80 km deep · 92 km away
- 4.758 km SE of Katsuura, Japan · 16573 days ago · 33 km deep · 85 km away
- 4.491 km SE of Hasaki, Japan · 16541 days ago · 33 km deep · 51 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001db1. Read Wed, Sep 30, 2026, 8:20 AM UTC.