M7.5 earthquake 38 km SW of Yonakuni, Japan
A magnitude 7.5 earthquake struck 38 km SW of Yonakuni, Japan on Sun, Mar 13, 1966, 12:31 AM GMT+8 (16:31 UTC), 25 km (15 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 7.5 (mw), major
- Local time
- UTC
- 1966-03-12 16:31:19 UTC
- Depth
- 24.6 km (15.3 mi), shallow
- Epicenter
- 24.271° N, 122.688° E
- Region
- Japan
- Strongest shaking
- VI, strong shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- VI, strong shaking
- Peak ground acceleration
- 10.8% of gravity
- Peak ground velocity
- 2.8 cm/s
- Map
- Automatic
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
- ±0.20
- 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: 5 in the 60 days after this one and 0 in the 30 days before it.
After
- 5.551 km SW of Yonakuni, Japan · 22109 days ago · 49 km deep · 14 km away
- 5.748 km SW of Yonakuni, Japan · 22105 days ago · 47 km deep · 11 km away
- 6.251 km S of Yonakuni, Japan · 22098 days ago · 45 km deep · 40 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 · 52 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem849160 (also filed as atlas19660312163119). Read Tue, Sep 22, 2026, 10:49 AM UTC.