LIGHT EARTHQUAKE
6 km N of Ashikaga, Japan
A magnitude 4.2 earthquake struck 6 km N of Ashikaga, Japan on 25 Aug 2026, 23:33 UTC. The hypocentre was 78.3 km below the surface — intermediate by seismological convention. 4 other earthquakes above our reporting threshold have been recorded within 250 km in the past 30 days.
- Depth
- 78.3 km
- Latitude
- 36.40°N
- Time
- 23:33 UTC
- Magnitude
- M4.2
intermediate
139.44°E longitude
25 Aug 2026
mb
EPICENTRE
MAGNITUDE 4.2
Noticeable shaking of indoor objects. Damage is unlikely.
The scale is logarithmic: this released about 63 times the energy of a magnitude 3.0, roughly the energy of 30 tonnes of TNT.
78.3 KM DEEP
At this depth the energy spreads before it reaches the surface. Shaking is usually weaker than a shallow earthquake of the same size, but it can be felt across a wider area.
NEARBY IN THE PAST 30 DAYS
4 earthquakes above our reporting threshold within 250 km of this one, the largest a magnitude 5.5.
OTHER RECENT EARTHQUAKES
02 Nov 2026, 05:19 UTC · 87.9 km deep
02 Nov 2026, 04:45 UTC · 10 km deep
02 Nov 2026, 04:28 UTC · 580.9 km deep
02 Nov 2026, 01:54 UTC · 510.1 km deep