M4.6 earthquake 27 km ESE of Hirara, Japan
A magnitude 4.6 earthquake struck 27 km ESE of Hirara, Japan on Sun, Jun 21, 1981, 9:55 AM JST (00:55 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.9 36 km ENE 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
- 4.6 (mb), light
- Local time
- UTC
- 1981-06-21 00:55:06 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 24.697° N, 125.547° 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: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.59 km SSW of Hirara, Japan · 16524 days ago · 55 km deep · 29 km away
- 4.936 km ENE of Hirara, Japan · 16488 days ago · 83 km deep · 32 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001e8s. Read Tue, Sep 22, 2026, 7:33 AM UTC.