M3.9 earthquake 12 km ESE of It?, Japan
A magnitude 3.9 earthquake struck 12 km ESE of It?, Japan on Sun, Jul 27, 1980, 6:29 PM JST (09:29 UTC), 11 km (7 mi) below the surface.
A larger quake followed: M5.0 39 km SW of Tateyama, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.9 (mb), minor
- Local time
- UTC
- 1980-07-27 09:29:27 UTC
- Depth
- 11.0 km (6.8 mi), shallow
- Epicenter
- 34.914° N, 139.205° 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.
- Stations used
- 9
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 8 in the 30 days before it.
After
- 5.039 km SW of Tateyama, Japan · 16840 days ago · 103 km deep · 43 km away
- 6.07 km NNE of Kisarazu, Japan · 16799 days ago · 73 km deep · 91 km away
- 5.56 km S of Ichihara, Japan · 16799 days ago · 74 km deep · 100 km away
- 4.97 km WSW of Ichihara, Japan · 16799 days ago · 76 km deep · 97 km away
- 4.77 km SW of Ichihara, Japan · 16799 days ago · 75 km deep · 96 km away
Before
- 4.418 km SE of It?, Japan · 16858 days ago · 24 km deep · 9 km away
- 4.423 km ENE of Shimoda, Japan · 16886 days ago · 23 km deep · 21 km away
- 4.8near the south coast of Honshu, Japan · 16886 days ago · 22 km deep · 15 km away
- 4.516 km ESE of It?, Japan · 16886 days ago · 21 km deep · 5 km away
- 6.219 km SSE of It?, Japan · 16887 days ago · 15 km deep · 12 km away
- 4.414 km SE of It?, Japan · 16887 days ago · 12 km deep · 3 km away
- 4.517 km SSE of It?, Japan · 16888 days ago · 12 km deep · 11 km away
- 4.013 km ESE of It?, Japan · 16888 days ago · 21 km deep · 2 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000193s. Read Tue, Sep 22, 2026, 8:28 PM UTC.