M4.2 earthquake 37 km SSE of Anan, Japan
A magnitude 4.2 earthquake struck 37 km SSE of Anan, Japan on Tue, Jul 30, 1985, 5:28 PM JST (08:28 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.7 35 km SSE of Anan, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mb), light
- Local time
- UTC
- 1985-07-30 08:28:55 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 33.593° N, 134.780° 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
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 3.827 km SSE of Anan, Japan · 14982 days ago · 33 km deep · 10 km away
- 4.735 km SSE of Anan, Japan · 14975 days ago · 25 km deep · 3 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002h78. Read Sun, Sep 27, 2026, 6:13 AM UTC.