M4.1 earthquake 22 km WNW of Yonakuni, Japan
A magnitude 4.1 earthquake struck 22 km WNW of Yonakuni, Japan on Sat, May 13, 1978, 2:24 AM GMT+8 (18:24 UTC), 102 km (63 mi) below the surface.
A larger quake followed: M5.0 48 km SSE of Yilan, Taiwan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.1 (mb), light
- Local time
- UTC
- 1978-05-12 18:24:26 UTC
- Depth
- 102.0 km (63.4 mi), intermediate-depth
- Epicenter
- 24.570° N, 122.812° 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
- 14
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 2 in the 30 days before it.
After
- 5.048 km SSE of Yilan, Taiwan · 17647 days ago · 2 km deep · 85 km away
- 4.033 km SSE of Yilan, Taiwan · 17645 days ago · 33 km deep · 93 km away
- 4.575 km SSW of Yonakuni, Japan · 17641 days ago · 33 km deep · 84 km away
- 4.477 km NNE of Yonakuni, Japan · 17638 days ago · 164 km deep · 81 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000uh6. Read Tue, Sep 22, 2026, 11:19 AM UTC.