M6.9 earthquake 54 km NW of Yonakuni, Japan
A magnitude 6.9 earthquake struck 54 km NW of Yonakuni, Japan on Mon, Apr 27, 1959, 5:40 AM GMT+9 (20:40 UTC), 118 km (73 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.9 (mw), strong
- Local time
- UTC
- 1959-04-26 20:40:39 UTC
- Depth
- 118.0 km (73.3 mi), intermediate-depth
- Epicenter
- 24.802° N, 122.600° 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
- 13.2% of gravity
- Peak ground velocity
- 2.1 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
- ±0.40
- 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: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem881876. Read Tue, Sep 22, 2026, 10:59 AM UTC.