M5.5 earthquake 74 km S of Honchō, Japan
A magnitude 5.5 earthquake struck 74 km S of Honchō, Japan on Tue, Aug 13, 1968, 5:31 AM JST (20:31 UTC), 22 km (13 mi) below the surface.
A larger quake followed: M6.1 142 km SSE of Honchō, Japan. This one was a foreshock.
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
- 1968-08-12 20:31:49 UTC
- Depth
- 21.6 km (13.4 mi), shallow
- Epicenter
- 41.461° N, 142.828° 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
- ±0.20
- 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: 3 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 iscgem817948. Read Tue, Sep 22, 2026, 6:25 PM UTC.