M5.7 earthquake 48 km SW of Yonakuni, Japan
A magnitude 5.7 earthquake struck 48 km SW of Yonakuni, Japan on Wed, Mar 16, 1966, 7:31 AM GMT+8 (23:31 UTC), 47 km (29 mi) below the surface.
A larger quake followed: M6.2 51 km S 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
- 5.7 (mw), moderate
- Local time
- UTC
- 1966-03-15 23:31:50 UTC
- Depth
- 46.8 km (29.1 mi), shallow
- Epicenter
- 24.187° N, 122.628° 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
- ±0.28
- 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: 3 in the 60 days after this one and 2 in the 30 days before it.
After
- 6.251 km S of Yonakuni, Japan · 22098 days ago · 45 km deep · 39 km away
- 6.246 km WSW of Yonakuni, Japan · 22055 days ago · 50 km deep · 8 km away
- 5.574 km SSW of Yonakuni, Japan · 22054 days ago · 21 km deep · 45 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem849288. Read Tue, Sep 22, 2026, 7:26 AM UTC.