M3.8 earthquake 76 km SW of Yonakuni, Japan
A magnitude 3.8 earthquake struck 76 km SW of Yonakuni, Japan on Mon, Mar 30, 1981, 2:42 AM GMT+8 (18:42 UTC), 7 km (5 mi) below the surface.
A larger quake followed: M4.6 66 km NW of Yonakuni, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.8 (mb), minor
- Local time
- UTC
- 1981-03-29 18:42:17 UTC
- Depth
- 7.3 km (4.5 mi), shallow
- Epicenter
- 23.973° N, 122.476° 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.
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.666 km NW of Yonakuni, Japan · 16592 days ago · 22 km deep · 93 km away
- 4.370 km SW of Yonakuni, Japan · 16590 days ago · 7 km deep · 8 km away
- 4.213 km ESE of Hualien City, Taiwan · 16582 days ago · 60 km deep · 76 km away
- 3.946 km E of Yilan, Taiwan · 16578 days ago · 73 km deep · 84 km away
- 4.368 km SW of Yonakuni, Japan · 16568 days ago · 33 km deep · 12 km away
- 4.016 km ENE of Hualien City, Taiwan · 16567 days ago · 17 km deep · 74 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001cxx. Read Tue, Sep 22, 2026, 10:26 AM UTC.