Earthquake · 28 Oct 2026
M5.5 earthquake — 5 km ESE of Asahi, Japan
- Event
- Earthquake
- Magnitude
- M5.5 (Moderate)
- Severity
- High
- Time
- (6 days ago)
- Location
- 5 km ESE of Asahi, Japan
- Country
- Japan
- Coordinates
- 35.702°, 140.706°
- Source
- USGS Earthquake Hazards Program
What this means
This was a moderate earthquake of magnitude 5.5. Can damage poorly built structures near the epicenter, while well-designed buildings usually suffer slight damage at most. Roughly 1,300 earthquakes of this size occur worldwide each year.
Magnitude measures the energy released at the source. How strongly the ground shook at any particular place depends on distance from the epicenter, the depth of the quake, local geology and building construction, so the same magnitude can be harmless in one place and damaging in another. First magnitudes are preliminary and are often revised by a few tenths as more stations report.
Other events within 300 km (±14 days)
- M4.5 earthquake — 223 km SE of Katsuura, Japan — 259 km away, 31 Oct 2026, 00:32 UTC
- M4.3 earthquake — 10 km SSE of Hasaki, Japan — 17 km away, 28 Oct 2026, 20:22 UTC
- M4.7 earthquake — 6 km N of Asahi, Japan — 10 km away, 28 Oct 2026, 18:32 UTC
- M4.6 earthquake — 203 km SSE of Tateyama, Japan — 269 km away, 27 Oct 2026, 01:17 UTC
- M4.8 earthquake — 54 km E of Tomioka, Japan — 205 km away, 27 Oct 2026, 00:25 UTC
- M4.5 earthquake — 74 km SSE of Onagawa Chō, Japan — 259 km away, 25 Oct 2026, 06:04 UTC
- M4.5 earthquake — 2 km N of Honchō, Japan — 65 km away, 21 Oct 2026, 01:04 UTC
- M4.4 earthquake — 100 km ESE of Takahagi, Japan — 125 km away, 15 Oct 2026, 02:05 UTC
Smaller earthquakes close in time and space to a larger one are often aftershocks or foreshocks, though GlobalRisk does not classify them.
More from Japan
GlobalRisk has recorded 58 events in or near Japan in the data we hold. See the full Japan risk monitor.
Source and attribution
Source: USGS Earthquake Hazards Program. View the original report ↗
GlobalRisk republishes only basic facts (type, time, location, magnitude or alert level) and links to the original report. Details may be revised by the source after this page was generated on 3 Nov 2026, 04:07 UTC.
Related guides
- Earthquake Magnitude Explained: What M4, M6 and M7 Really Mean
- Earthquake Safety: What to Do Before, During and After
For situational awareness only, not an official warning. Follow local authorities. Open the live map