M4.7 earthquake 70 km ENE of Mutsu, Japan
A magnitude 4.7 earthquake struck 70 km ENE of Mutsu, Japan on Mon, Apr 22, 1985, 2:21 PM JST (05:21 UTC), 72 km (45 mi) below the surface.
A larger quake followed: M5.8 72 km ENE of Mutsu, 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), light
- Local time
- UTC
- 1985-04-22 05:21:38 UTC
- Depth
- 71.8 km (44.6 mi), intermediate-depth
- Epicenter
- 41.444° N, 142.040° 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.
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 5 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.673 km ENE of Mutsu, Japan · 15123 days ago · 76 km deep · 18 km away
- 5.872 km ENE of Mutsu, Japan · 15123 days ago · 71 km deep · 4 km away
- 5.1Hokkaido, Japan region · 15089 days ago · 72 km deep · 16 km away
- 4.536 km SW of Shizunai-furukawach?, Japan · 15077 days ago · 56 km deep · 72 km away
- 4.371 km NE of Mutsu, Japan · 15071 days ago · 33 km deep · 38 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002e10. Read Wed, Sep 23, 2026, 8:41 PM UTC.