M5.9 earthquake 115 km SE of Hasaki, Japan
A magnitude 5.9 earthquake struck 115 km SE of Hasaki, Japan on Sat, Apr 16, 1966, 7:13 PM JST (10:13 UTC), 20 km (12 mi) below the surface.
A larger quake followed: M6.1 113 km ESE of Hasaki, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.9 (Mw, moment), moderate
- Magnitude from
- ISC-GEM global catalog
- Local time
- UTC
- 1966-04-16 10:13:24 UTC
- Depth
- 20.1 km (12.5 mi), shallow
- Epicenter
- 35.011° N, 141.752° 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
- ±0.23
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.9 and up: 2 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem848450. Read Fri, Oct 2, 2026, 2:33 PM UTC.