M5.6 earthquake 5 km SE of Nagano, Japan
A magnitude 5.6 earthquake struck 5 km SE of Nagano, Japan on Sat, May 28, 1966, 2:21 PM JST (05:21 UTC), 11 km (7 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.6 (mw), moderate
- Local time
- UTC
- 1966-05-28 05:21:23 UTC
- Depth
- 10.5 km (6.5 mi), shallow
- Epicenter
- 36.612° N, 138.219° 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: 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 iscgem847884. Read Tue, Sep 22, 2026, 8:50 PM UTC.