M3.6 earthquake 4 km N of Urayasu, Japan
A magnitude 3.6 earthquake struck 4 km N of Urayasu, Japan on Thu, Aug 23, 1973, 10:56 AM JST (01:56 UTC), 50 km (31 mi) below the surface.
A larger quake followed: M5.9 2 km ENE of Narut?, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.6 (mb), minor
- Local time
- UTC
- 1973-08-23 01:56:26 UTC
- Depth
- 50.0 km (31.1 mi), shallow
- Epicenter
- 35.712° N, 139.898° 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
- 8
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 3 in the 30 days before it.
After
- 5.111 km WSW of Kanuma, Japan · 19395 days ago · 115 km deep · 93 km away
- 5.92 km ENE of Narut?, Japan · 19358 days ago · 62 km deep · 51 km away
- 5.62 km NNE of Y?kaichiba, Japan · 19356 days ago · 56 km deep · 60 km away
- 4.01 km SW of Asahi, Japan · 19356 days ago · 61 km deep · 67 km away
- 4.16 km ESE of Asahi, Japan · 19352 days ago · 59 km deep · 73 km away
- 4.715 km SSE of Asahi, Japan · 19336 days ago · 60 km deep · 75 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000035v. Read Tue, Sep 29, 2026, 11:40 PM UTC.