M3.9 earthquake 109 km E of Yamada, Japan
A magnitude 3.9 earthquake struck 109 km E of Yamada, Japan on Mon, Sep 10, 1973, 3:40 AM JST (18:40 UTC), 34 km (21 mi) below the surface.
A larger quake followed: M4.0 131 km E of Yamada, 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
- 1973-09-09 18:40:33 UTC
- Depth
- 34.0 km (21.1 mi), shallow
- Epicenter
- 39.425° N, 143.217° 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
- 8
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 15 in the 30 days before it.
After
- 4.0131 km E of Yamada, Japan · 19372 days ago · 37 km deep · 22 km away
- 4.3110 km E of Yamada, Japan · 19372 days ago · 29 km deep · 7 km away
- 4.1off the east coast of Honshu, Japan · 19372 days ago · 33 km deep · 26 km away
- 5.0112 km E of Yamada, Japan · 19372 days ago · 28 km deep · 5 km away
- 4.3131 km E of Yamada, Japan · 19371 days ago · 18 km deep · 23 km away
- 4.6130 km E of Yamada, Japan · 19371 days ago · 30 km deep · 22 km away
- 4.4104 km E of Yamada, Japan · 19370 days ago · 29 km deep · 19 km away
- 4.1131 km E of Yamada, Japan · 19356 days ago · 31 km deep · 22 km away
- 4.1113 km E of Yamada, Japan · 19321 days ago · 32 km deep · 10 km away
Before
- 5.9102 km E of Yamada, Japan · 19372 days ago · 23 km deep · 14 km away
- 4.6139 km E of Miyako, Japan · 19372 days ago · 23 km deep · 59 km away
- 4.0131 km ENE of Miyako, Japan · 19372 days ago · 25 km deep · 59 km away
- 4.1136 km ENE of Miyako, Japan · 19374 days ago · 33 km deep · 58 km away
- 4.1100 km E of Yamada, Japan · 19375 days ago · 28 km deep · 10 km away
- 4.097 km E of Yamada, Japan · 19375 days ago · 33 km deep · 14 km away
- 4.298 km E of Yamada, Japan · 19376 days ago · 33 km deep · 17 km away
- 4.097 km E of Yamada, Japan · 19376 days ago · 33 km deep · 12 km away
- 3.9104 km E of Yamada, Japan · 19376 days ago · 31 km deep · 8 km away
- 3.8111 km E of Yamada, Japan · 19376 days ago · 33 km deep · 7 km away
- 4.5116 km E of Yamada, Japan · 19376 days ago · 18 km deep · 9 km away
- 4.4105 km E of Yamada, Japan · 19376 days ago · 52 km deep · 12 km away
- 4.7106 km E of Yamada, Japan · 19376 days ago · 33 km deep · 6 km away
- 5.899 km E of Yamada, Japan · 19376 days ago · 41 km deep · 11 km away
- 4.3116 km E of Yamada, Japan · 19376 days ago · 45 km deep · 8 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00003cs. Read Wed, Sep 23, 2026, 2:06 PM UTC.