M4.7 earthquake 135 km WSW of Itoman, Japan
A magnitude 4.7 earthquake struck 135 km WSW of Itoman, Japan on Tue, Jan 18, 1983, 4:06 AM JST (19:06 UTC), 51 km (31 mi) below the surface.
A larger quake followed: M5.0 132 km NNE of Hirara, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1983-01-17 19:06:05 UTC
- Depth
- 50.6 km (31.4 mi), shallow
- Epicenter
- 25.654° N, 126.424° 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 |
|---|---|---|---|
| 4.7 | mb, body-wave | USGS National Earthquake Information Center | Preferred · Reviewed · 12 stations |
| 5.01 | Mw, moment | ISCGEMSUP | Final · ±0.2 |
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 1.7 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 usp0001sb3 (also filed as iscgemsup585030). Read Fri, Oct 2, 2026, 2:33 AM UTC.