M3.9 earthquake 4 km SSW of Hitachi, Japan
A magnitude 3.9 earthquake struck 4 km SSW of Hitachi, Japan on Sat, Apr 5, 1986, 9:29 AM JST (00:29 UTC), 60 km (37 mi) below the surface.
A larger quake followed: M4.2 7 km ENE of Sakai, 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
- 1986-04-05 00:29:45 UTC
- Depth
- 60.0 km (37.3 mi), shallow
- Epicenter
- 36.563° N, 140.636° 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.
- Depth from
- FROM_LOCATION
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.27 km ENE of Sakai, Japan · 14771 days ago · 65 km deep · 84 km away
- 4.750 km E of ?arai, Japan · 14754 days ago · 44 km deep · 51 km away
- 4.856 km E of ?arai, Japan · 14754 days ago · 42 km deep · 57 km away
- 4.852 km ESE of Iwaki, Japan · 14750 days ago · 77 km deep · 84 km away
- 4.27 km NNE of Naka, Japan · 14744 days ago · 87 km deep · 64 km away
- 4.987 km E of ?arai, Japan · 14740 days ago · 33 km deep · 87 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002sp2. Read Tue, Sep 22, 2026, 4:25 PM UTC.