M4.8 earthquake 54 km E of Iwaki, Japan
A magnitude 4.8 earthquake struck 54 km E of Iwaki, Japan on Mon, Mar 29, 1982, 9:05 PM JST (12:05 UTC), 51 km (32 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
- 4.8 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1982-03-29 12:05:26 UTC
- Depth
- 51.1 km (31.8 mi), shallow
- Epicenter
- 37.121° N, 141.493° E
- Region
- Japan
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 4.8 | mb, body-wave | USGS National Earthquake Information Center | Preferred · Reviewed · 14 stations |
| 5.17 | Mw, moment | ISC-GEM global catalog | Final · ±0.26 |
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 1.8 and up: 6 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.493 km ESE of Namie, Japan · 16241 days ago · 33 km deep · 39 km away
- 4.2106 km ESE of Kitaibaraki, Japan · 16239 days ago · 33 km deep · 84 km away
- 4.286 km ESE of Takahagi, Japan · 16239 days ago · 33 km deep · 75 km away
- 4.645 km E of Iwaki, Japan · 16208 days ago · 68 km deep · 10 km away
- 4.9114 km E of Namie, Japan · 16202 days ago · 33 km deep · 77 km away
- 4.7120 km E of Namie, Japan · 16202 days ago · 33 km deep · 84 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001kea (also filed as iscgem603253). Read Mon, Oct 5, 2026, 11:37 AM UTC.