M4.3 earthquake 97 km S of Yonakuni, Japan
A magnitude 4.3 earthquake struck 97 km S of Yonakuni, Japan on Wed, Nov 20, 1985, 6:09 PM GMT+8 (10:09 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.9 80 km ESE of Hualien City, Taiwan. 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, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1985-11-20 10:09:30 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 23.595° N, 122.899° 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 3 in the 30 days before it.
After
- 4.572 km SW of Yonakuni, Japan · 14923 days ago · 43 km deep · 74 km away
- 4.980 km ESE of Hualien City, Taiwan · 14892 days ago · 45 km deep · 59 km away
- 3.769 km SW of Yonakuni, Japan · 14887 days ago · 10 km deep · 53 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002mz7. Read Fri, Oct 2, 2026, 11:47 PM UTC.