M4.5 earthquake 15 km SE of Hasaki, Japan
A magnitude 4.5 earthquake struck 15 km SE of Hasaki, Japan on Thu, Nov 21, 1985, 6:06 PM JST (09:06 UTC), 58 km (36 mi) below the surface.
A larger quake followed: M4.6 19 km NE of Hasaki, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1985-11-21 09:06:03 UTC
- Depth
- 57.9 km (36.0 mi), shallow
- Epicenter
- 35.645° N, 140.959° E
- Region
- Japan
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
What happened
The USGS’s account of the effects of this earthquake.
Felt (I JMA) at Choshi and Yokohama.
From the USGS event page for usp0002n0d. U.S. Geological Survey text and figures are in the public domain.
Did you feel it?
No one has reported feeling this quake to the USGS.
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 3 in the 30 days before it.
After
- 3.96 km E of Hasaki, Japan · 14921 days ago · 64 km deep · 11 km away
- 4.14 km SSW of Tsukuba, Japan · 14910 days ago · 89 km deep · 98 km away
- 4.473 km ESE of Hasaki, Japan · 14890 days ago · 33 km deep · 60 km away
- 4.210 km NNW of ?hara, Japan · 14880 days ago · 27 km deep · 67 km away
- 4.619 km NE of Hasaki, Japan · 14880 days ago · 53 km deep · 25 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002n0d. Read Thu, Oct 1, 2026, 2:55 PM UTC.