Earthquake details

Sunday, August 28, 1966 Earthquake

The earthquake hit Japan on Sunday, August 28, 1966 at 04:09 UTC with a magnitude of 5.6. The closest known location in the current dataset is Chikuma (Japan - JP), about 10.9 km away. The epicenter is located at longitude 138.209 and latitude 36.507.

Magnitude	5.6
Alert	Strong
Depth	15.0 km
Coordinates	36.507, 138.209
UTC time	1966-08-28 04:09:24.630

Location	Nagano
Country	Japan (JP)
Severity	Strong

Earthquake map 1966-08-28

Closest countries

The 12 closest cities near the epicenter.

Chikuma	10.9 km
Ueda	13.3 km
Nagano	16.1 km
Suzaka	18.6 km
Tōmi	21.6 km
Komoro	29.2 km
Nakano	30.5 km
Hotaka	34.7 km
Matsumoto	37.4 km
Azumino	37.8 km
Saku	40.6 km
Shiojiri	50.3 km

Nearby earthquakes

The latest 8 earthquakes within 100 km of this epicenter.

M 4.9 Chikuma Japan · 2026-04-18 05:54 UTC	27.0 km
M 4.9 Chikuma Japan · 2026-04-18 04:20 UTC	32.5 km
M 5.1 Matsumoto Japan · 2026-01-15 05:48 UTC	54.6 km
M 4.7 Azumino Japan · 2026-01-15 05:40 UTC	55.3 km
M 4.1 Chichibu Japan · 2025-08-23 10:22 UTC	86.0 km

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