M4.9 earthquake 72 km SE of Yonakuni, Japan
A magnitude 4.9 earthquake struck 72 km SE of Yonakuni, Japan on Tue, Jan 30, 1973, 6:23 AM JST (21:23 UTC), 53 km (33 mi) below the surface.
A larger quake followed: M6.0 104 km S of Ishigaki, 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
- 1973-01-29 21:23:39 UTC
- Depth
- 53.0 km (32.9 mi), shallow
- Epicenter
- 23.948° N, 123.438° 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
- 30
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 and up: 5 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.053 km NW of Ishigaki, Japan · 19539 days ago · 98 km deep · 91 km away
- 6.0104 km S of Ishigaki, Japan · 19538 days ago · 16 km deep · 79 km away
- 5.058 km ESE of Yonakuni, Japan · 19537 days ago · 77 km deep · 43 km away
- 6.0118 km SSW of Ishigaki, Japan · 19535 days ago · 33 km deep · 75 km away
- 4.479 km SSE of Yonakuni, Japan · 19535 days ago · 33 km deep · 10 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00000b6 (also filed as iscgemsup765408). Read Tue, Sep 22, 2026, 9:15 AM UTC.