M4.6 earthquake 45 km E of Iwaki, Japan
A magnitude 4.6 earthquake struck 45 km E of Iwaki, Japan on Fri, May 21, 1982, 5:15 PM JST (08:15 UTC), 68 km (42 mi) below the surface.
A larger quake followed: M4.9 114 km E of Namie, 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
- 1982-05-21 08:15:49 UTC
- Depth
- 67.6 km (42.0 mi), shallow
- Epicenter
- 37.098° N, 141.388° 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.
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.9114 km E of Namie, Japan · 16189 days ago · 33 km deep · 86 km away
- 4.7120 km E of Namie, Japan · 16189 days ago · 33 km deep · 94 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001men. Read Tue, Sep 22, 2026, 9:13 AM UTC.