M3.3 earthquake 6 km N of Ashikaga, Japan
A magnitude 3.3 earthquake struck 6 km N of Ashikaga, Japan on Thu, Jul 26, 1973, 7:39 PM JST (10:39 UTC), 14 km (9 mi) below the surface.
A larger quake followed: M4.6 7 km WNW of Tsukuba, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.3 (mb), minor
- Local time
- UTC
- 1973-07-26 10:39:35 UTC
- Depth
- 14.0 km (8.7 mi), shallow
- Epicenter
- 36.395° N, 139.449° 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
- 11
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 2 in the 30 days before it.
After
- 4.67 km WNW of Tsukuba, Japan · 19415 days ago · 81 km deep · 55 km away
- 4.15 km ESE of Sakai, Japan · 19391 days ago · 61 km deep · 50 km away
- 3.58 km NNW of Funaishikawa, Japan · 19390 days ago · 53 km deep · 99 km away
- 3.64 km N of Urayasu, Japan · 19388 days ago · 50 km deep · 86 km away
- 5.111 km WSW of Kanuma, Japan · 19388 days ago · 115 km deep · 20 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00002v6. Read Tue, Sep 22, 2026, 11:20 AM UTC.