M4.8 earthquake 67 km ESE of Mutsu, Japan
A magnitude 4.8 earthquake struck 67 km ESE of Mutsu, Japan on Sun, Aug 9, 1987, 3:37 PM JST (06:37 UTC), 75 km (46 mi) below the surface.
A larger quake followed: M4.9 68 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
- 4.8 (mb), light
- Local time
- UTC
- 1987-08-09 06:37:28 UTC
- Depth
- 74.8 km (46.5 mi), intermediate-depth
- Epicenter
- 41.112° N, 141.986° 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 1.8 and up: 3 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.562 km ENE of Mutsu, Japan · 14288 days ago · 70 km deep · 45 km away
- 4.445 km NE of Mutsu, Japan · 14261 days ago · 33 km deep · 55 km away
- 4.968 km ENE of Mutsu, Japan · 14248 days ago · 74 km deep · 38 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00037ct. Read Tue, Sep 22, 2026, 8:01 AM UTC.