M4.9 earthquake 83 km E of Mutsu, Japan
A magnitude 4.9 earthquake struck 83 km E of Mutsu, Japan on Thu, May 25, 1978, 11:43 AM JST (02:43 UTC), 47 km (29 mi) below the surface.
A larger quake followed: M5.4 53 km SSE of Shizunai-furukawach?, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.9 (mb), light
- Local time
- UTC
- 1978-05-25 02:43:33 UTC
- Depth
- 47.0 km (29.2 mi), shallow
- Epicenter
- 41.182° N, 142.197° 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
- CONSTRAINED_BY_DEPTH_PHASES
- Stations used
- 77
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 and up: 3 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.729 km S of Mutsu, Japan · 17607 days ago · 33 km deep · 84 km away
- 4.455 km SSE of Shizunai-furukawach?, Japan · 17606 days ago · 65 km deep · 89 km away
- 5.453 km SSE of Shizunai-furukawach?, Japan · 17601 days ago · 62 km deep · 81 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000uqy. Read Tue, Sep 22, 2026, 10:33 PM UTC.