M4.8 earthquake 43 km NE of Hasaki, Japan
A magnitude 4.8 earthquake struck 43 km NE of Hasaki, Japan on Sun, Sep 13, 1981, 10:20 AM JST (01:20 UTC), 39 km (24 mi) below the surface.
A larger quake followed: M5.2 51 km E of ?hara, 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 (Ms, surface-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1981-09-13 01:20:14 UTC
- Depth
- 39.0 km (24.2 mi), shallow
- Epicenter
- 36.039° N, 141.131° 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 | Ms, surface-wave | USGS National Earthquake Information Center | Preferred · Reviewed · 1 stations |
| 5.32 | Mw, moment | ISCGEMSUP | Final · ±0.33 |
What happened
The USGS’s account of the effects of this earthquake.
FELT (III JMA) IN CENTRAL JAPAN.
From the USGS event page for usp0001fur. U.S. Geological Survey text and figures are in the public domain.
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
- CONSTRAINED_BY_DEPTH_PHASES
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
- 4.599 km ESE of Takahagi, Japan · 16458 days ago · 33 km deep · 71 km away
- 4.674 km SE of Hasaki, Japan · 16456 days ago · 33 km deep · 90 km away
- 4.767 km SSE of Hasaki, Japan · 16444 days ago · 33 km deep · 91 km away
- 4.333 km ESE of Hitachi, Japan · 16440 days ago · 65 km deep · 47 km away
- 5.251 km E of ?hara, Japan · 16437 days ago · 38 km deep · 91 km away
- 4.449 km SE of Hasaki, Japan · 16417 days ago · 33 km deep · 67 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001fur (also filed as iscgemsup611403). Read Mon, Oct 5, 2026, 4:27 AM UTC.