M6.4 earthquake 63 km SW of Yonakuni, Japan
A magnitude 6.4 earthquake struck 63 km SW of Yonakuni, Japan on Tue, Dec 21, 1948, 7:07 AM GMT+8 (23:07 UTC), 35 km (22 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.4 (mw), strong
- Local time
- UTC
- 1948-12-20 23:07:27 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 24.132° N, 122.487° 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.
- Magnitude uncertainty
- ±0.35
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem897684. Read Tue, Sep 22, 2026, 6:39 AM UTC.