M5.5 earthquake 158 km SSE of Honchō, Japan
A magnitude 5.5 earthquake struck 158 km SSE of Honchō, Japan on Thu, Mar 4, 1971, 4:48 PM JST (07:48 UTC), 32 km (20 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.5 (mw), moderate
- Local time
- UTC
- 1971-03-04 07:48:40 UTC
- Depth
- 31.8 km (19.8 mi), shallow
- Epicenter
- 40.780° N, 143.554° 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.
- Magnitude uncertainty
- ±0.23
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 0 in the 60 days after this one and 1 in the 30 days before it.
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem786150. Read Tue, Sep 22, 2026, 3:36 PM UTC.