USGS · October 29, 2026
Magnitude 5.5 earthquake near Asahi, Japan
A magnitude 5.5 earthquake was recorded near 5 km ESE of Asahi, Japan on Oct 29, 2026, 12:07 AM (local time at the epicentre — UTC+9), at a depth of about 41.4 km, according to USGS.
USGSFelt by 34 people · community intensity IV (light)Shaking VPAGER GreenShallow (0–70 km)Reviewed by a seismologist
Updated 2026-10-28 17:39 UTC
The full record
- Magnitude
- M 5.5 · moment magnitude (W-phase)
- Location
- 5 km ESE of Asahi, Japan
- Local time at the epicentre
- Oct 29, 2026, 12:07 AM — UTC+9
- Time (UTC)
- 2026-10-28 15:07 UTC
- Depth
- 41.4 km · Shallow (0–70 km)
- Coordinates
- 35.702, 140.706
- Felt reports
- Felt by 34 people · community intensity IV (light)
- Estimated shaking
- V · Moderate
- PAGER impact alert
- Green — No casualties or significant damage expected.
- Tsunami
- No tsunami evaluation was flagged for this earthquake.
- Significance
- 478 / 1000 · notable event
- Solution quality
- 116 seismic stations used · 64° azimuthal gap (well-constrained epicentre)
- Review status
- Reviewed by a seismologist
- Catalog
- USGS
Epicentre and nearby recent earthquakes
The highlighted circle is this earthquake. Smaller circles are other events recorded nearby in the last 30 days.
What the shaking was like
Shallow earthquakes release their energy close to the surface, so they are felt more strongly nearby than a deeper earthquake of the same magnitude.
Estimated instrumental shaking V (Moderate): Felt by nearly everyone; unstable objects overturn and some plaster cracks.
People who reported it described intensity IV (Light): Felt indoors by many; dishes and windows rattle and parked cars rock.
Felt it yourself? USGS collects first-hand reports through “Did You Feel It?”, and those reports are what produce the community intensity above.
Who lives nearby
About 713,685 people live in towns within 30 km of the epicentre, and 34,854,985 within 100 km. Distances are from the epicentre to the town centre.
| Place | Distance | Population |
|---|---|---|
| Asahi | 5.3 km WNW | 64,690 |
| Choshi | 12.0 km ENE | 58,431 |
| Hasaki | 12.0 km ENE | 39,209 |
| Sōsa | 13.9 km W | 35,674 |
| Yōkaichiba | 14.1 km W | 32,651 |
| Sukayama | 15.1 km NNW | 13,228 |
| Omigawa | 18.4 km NNW | 25,763 |
| Yokoshiba | 20.9 km WSW | 22,075 |
| Tako | 21.9 km W | 14,387 |
| Kamisu | 22.0 km N | 95,454 |
Earthquake history in this area
11 earthquakes of magnitude 4.5+ have been recorded within 200 km of this epicentre since 1960, in Japan.
Other earthquakes near this epicentre
13 other events within 100 km in the last 30 days.
M 4.5 2 km N of Honchō, JapanFelt · 9
M 4.2 9 km W of Ōami, Japan
M 4.7 4 km SE of Narutō, Japan
M 4.3 3 km SSW of Funaishikawa, Japan
M 4.9 3 km WSW of Shibayama, JapanFelt · 4
M 4.5 3 km ESE of Sugito, JapanFelt · 4
M 3.3 5 km NW of Sukayama, Japan
M 3.6 5 km WNW of Asahi, Japan
M 5.2 0 km ENE of Yokoshiba, JapanFelt · 26
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Frequently asked questions
How strong was the 5 km ESE of Asahi, Japan earthquake?
Magnitude 5.5 (moment magnitude (W-phase)), at a depth of 41.4 km. Shallow earthquakes release their energy close to the surface, so they are felt more strongly nearby than a deeper earthquake of the same magnitude.
Exactly when did it happen?
Oct 29, 2026, 12:07 AM (local time at the epicentre — UTC+9). In universal time: 2026-10-28 15:07 UTC.
Was it felt?
Felt by 34 people · community intensity IV (light). Felt by nearly everyone; unstable objects overturn and some plaster cracks.
Was there a tsunami warning?
No tsunami evaluation was flagged for this earthquake.
Which towns are closest to the epicentre?
The closest is Asahi, 5.3 km WNW (population 64,690).
Are earthquakes normal in this area?
Yes. The largest earthquake recorded within 200 km since 1960 was magnitude 7.9 (47 km E of Ōarai, Japan, 2011), and 13 further events were recorded within 100 km in the last 30 days.
How do I get alerts for the next earthquake here?
Install the free SeismoWatch Android app, draw a box over this area, set a minimum magnitude, and turn alerts on.
About this page
Event data: U.S. Geological Survey (USGS), the European-Mediterranean Seismological Centre (EMSC), in Venezuela FUNVISIS and in Brazil the RSBR through the Centro de Sismologia da USP. Populated places and time zones: GeoNames (CC BY 4.0). Preliminary solutions are revised as more observations arrive.