M4.7 earthquake 59 km SSW of Yonakuni, Japan
A magnitude 4.7 earthquake struck 59 km SSW of Yonakuni, Japan on Wed, Feb 8, 1978, 9:27 AM GMT+8 (01:27 UTC), 40 km (25 mi) below the surface.
A larger quake followed: M5.5 57 km SW of Yonakuni, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb), light
- Local time
- UTC
- 1978-02-08 01:27:04 UTC
- Depth
- 40.0 km (24.9 mi), shallow
- Epicenter
- 23.973° N, 122.767° 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
- 21
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.557 km SW of Yonakuni, Japan · 17724 days ago · 43 km deep · 17 km away
- 4.388 km SE of Hualien City, Taiwan · 17704 days ago · 35 km deep · 80 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000svf (also filed as iscgem686198). Read Tue, Sep 22, 2026, 11:18 AM UTC.