M4.1 earthquake 11 km NW of Ichihara, Japan
A magnitude 4.1 earthquake struck 11 km NW of Ichihara, Japan on Fri, May 26, 1978, 3:18 AM JST (18:18 UTC), 62 km (39 mi) below the surface.
A larger quake followed: M4.4 2 km WSW of Iwai, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.1 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1978-05-25 18:18:12 UTC
- Depth
- 62.0 km (38.5 mi), shallow
- Epicenter
- 35.574° N, 139.980° 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 1.5 and up: 1 in the 60 days after this one and 1 in the 30 days before it.
After
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000urb. Read Thu, Oct 1, 2026, 5:59 AM UTC.