M4.6 earthquake 9 km W of ?ami, Japan
A magnitude 4.6 earthquake struck 9 km W of ?ami, Japan on Mon, Oct 13, 1980, 7:55 PM JST (10:55 UTC), 78 km (48 mi) below the surface.
A larger quake followed: M4.7 8 km W of Hasaki, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1980-10-13 10:55:34 UTC
- Depth
- 78.0 km (48.5 mi), intermediate-depth
- Epicenter
- 35.531° N, 140.212° 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
- 24
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 5 in the 60 days after this one and 7 in the 30 days before it.
After
- 4.78 km W of Hasaki, Japan · 16769 days ago · 62 km deep · 53 km away
- 4.65 km ENE of Shiroi, Japan · 16753 days ago · 58 km deep · 34 km away
- 4.23 km WSW of Ushiku, Japan · 16746 days ago · 80 km deep · 48 km away
- 3.86 km E of Narita, Japan · 16736 days ago · 83 km deep · 33 km away
- 5.012 km NNW of Hasaki, Japan · 16731 days ago · 60 km deep · 61 km away
Before
- 4.75 km E of Ishige, Japan · 16787 days ago · 82 km deep · 67 km away
- 4.77 km SW of Ichihara, Japan · 16798 days ago · 75 km deep · 18 km away
- 4.97 km WSW of Ichihara, Japan · 16799 days ago · 76 km deep · 19 km away
- 5.56 km S of Ichihara, Japan · 16799 days ago · 74 km deep · 14 km away
- 6.07 km NNE of Kisarazu, Japan · 16799 days ago · 73 km deep · 24 km away
- 5.42 km SW of Hasuda, Japan · 16799 days ago · 89 km deep · 70 km away
- 4.7near the south coast of Honshu, Japan · 16802 days ago · 66 km deep · 71 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001a88. Read Tue, Sep 22, 2026, 6:10 AM UTC.