M4.3 earthquake 78 km SSE of Hasaki, Japan
A magnitude 4.3 earthquake struck 78 km SSE of Hasaki, Japan on Thu, Apr 6, 1978, 11:23 PM JST (14:23 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.2 55 km E of ?hara, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mb), light
- Local time
- UTC
- 1978-04-06 14:23:19 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 35.116° N, 141.247° 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
- Stations used
- 8
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 4 in the 30 days before it.
After
- 5.255 km E of ?hara, Japan · 17701 days ago · 38 km deep · 26 km away
- 5.958 km E of ?hara, Japan · 17700 days ago · 31 km deep · 22 km away
- 4.780 km SSE of Hasaki, Japan · 17700 days ago · 19 km deep · 4 km away
- 4.284 km SSE of Hasaki, Japan · 17700 days ago · 15 km deep · 6 km away
- 5.02 km WNW of Asahi, Japan · 17700 days ago · 57 km deep · 88 km away
- 4.516 km SSW of Hasaki, Japan · 17696 days ago · 55 km deep · 66 km away
- 4.583 km SSE of Hasaki, Japan · 17690 days ago · 33 km deep · 9 km away
- 4.5140 km ESE of ?hara, Japan · 17678 days ago · 33 km deep · 72 km away
- 4.55 km ESE of Mobara, Japan · 17652 days ago · 35 km deep · 88 km away
- 4.3135 km SE of Hasaki, Japan · 17652 days ago · 33 km deep · 74 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000ty4. Read Tue, Sep 22, 2026, 8:20 AM UTC.