M4.7 earthquake 80 km SSE of Hasaki, Japan
A magnitude 4.7 earthquake struck 80 km SSE of Hasaki, Japan on Fri, Apr 7, 1978, 9:01 AM JST (00:01 UTC), 19 km (12 mi) below the surface.
A larger quake followed: M5.0 2 km WNW of Asahi, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb), light
- Local time
- UTC
- 1978-04-07 00:01:22 UTC
- Depth
- 19.0 km (11.8 mi), shallow
- Epicenter
- 35.111° N, 141.290° 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
- 28
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 7 in the 60 days after this one and 7 in the 30 days before it.
After
- 4.284 km SSE of Hasaki, Japan · 17701 days ago · 15 km deep · 4 km away
- 5.02 km WNW of Asahi, Japan · 17700 days ago · 57 km deep · 91 km away
- 4.516 km SSW of Hasaki, Japan · 17696 days ago · 55 km deep · 69 km away
- 4.583 km SSE of Hasaki, Japan · 17691 days ago · 33 km deep · 5 km away
- 4.5140 km ESE of ?hara, Japan · 17678 days ago · 33 km deep · 70 km away
- 4.55 km ESE of Mobara, Japan · 17653 days ago · 35 km deep · 92 km away
- 4.3135 km SE of Hasaki, Japan · 17652 days ago · 33 km deep · 70 km away
Before
- 5.958 km E of ?hara, Japan · 17701 days ago · 31 km deep · 26 km away
- 5.255 km E of ?hara, Japan · 17701 days ago · 38 km deep · 30 km away
- 4.378 km SSE of Hasaki, Japan · 17701 days ago · 33 km deep · 4 km away
- 4.556 km E of ?hara, Japan · 17701 days ago · 45 km deep · 27 km away
- 5.058 km E of ?hara, Japan · 17701 days ago · 27 km deep · 25 km away
- 4.666 km SE of Katsuura, Japan · 17701 days ago · 70 km deep · 60 km away
- 4.856 km SSE of Hasaki, Japan · 17702 days ago · 40 km deep · 25 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000tyc. Read Tue, Sep 22, 2026, 4:01 PM UTC.