M4.6 earthquake 148 km ESE of Iwaki, Japan
A magnitude 4.6 earthquake struck 148 km ESE of Iwaki, Japan on Tue, Dec 7, 1982, 12:33 PM JST (03:33 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.7 90 km ENE 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
- 4.6 (mb), light
- Local time
- UTC
- 1982-12-07 03:33:53 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 36.602° N, 142.450° 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.
- Depth from
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 4 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.689 km E of ?arai, Japan · 15971 days ago · 57 km deep · 85 km away
- 4.357 km E of Kitaibaraki, Japan · 15971 days ago · 52 km deep · 96 km away
- 4.790 km ENE of Hasaki, Japan · 15943 days ago · 55 km deep · 84 km away
- 5.056 km E of Kitaibaraki, Japan · 15943 days ago · 55 km deep · 96 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001ra7 (also filed as iscgemsup586469). Read Tue, Sep 22, 2026, 4:50 PM UTC.