M4.2 earthquake 57 km SW of Yonakuni, Japan
A magnitude 4.2 earthquake struck 57 km SW of Yonakuni, Japan on Mon, Oct 26, 1981, 7:22 AM GMT+8 (23:22 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.5 31 km NNW 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
- 4.2 (mb), light
- Local time
- UTC
- 1981-10-25 23:22:07 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 24.088° N, 122.609° 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 2 in the 30 days before it.
After
- 3.837 km ENE of Hualien City, Taiwan · 16381 days ago · 10 km deep · 66 km away
- 4.531 km NNW of Yonakuni, Japan · 16353 days ago · 140 km deep · 77 km away
- 4.536 km E of Yilan, Taiwan · 16349 days ago · 111 km deep · 95 km away
- 4.539 km NNW of Yonakuni, Japan · 16344 days ago · 128 km deep · 85 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001gp5. Read Tue, Sep 22, 2026, 9:57 AM UTC.