USGS · August 15, 2026
Magnitude 4.7 earthquake — 24 km ENE of Iwaki, Japan
A magnitude 4.7 earthquake was recorded near 24 km ENE of Iwaki, Japan on Aug 15, 2026, 10:10 AM (local time at the epicentre — UTC+9), at a depth of about 57.7 km, according to USGS.
USGSFelt by 2 people · community intensity II (weak)Shallow (0–70 km)Reviewed by a seismologist
Updated 2026-09-04 18:17 UTC
The full record
- Magnitude
- M 4.7 · body-wave magnitude
- Location
- 24 km ENE of Iwaki, Japan
- Local time at the epicentre
- Aug 15, 2026, 10:10 AM — UTC+9
- Time (UTC)
- 2026-08-15 01:10 UTC
- Depth
- 57.7 km · Shallow (0–70 km)
- Coordinates
- 37.135, 141.133
- Felt reports
- Felt by 2 people · community intensity II (weak)
- Tsunami
- No tsunami evaluation was flagged for this earthquake.
- Significance
- 340 / 1000 · notable event
- Solution quality
- 50 seismic stations used · 139° 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.
People who reported it described intensity II (Weak): Felt by a few people at rest, mostly on upper floors.
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 368,559 people live in towns within 30 km of the epicentre, and 2,835,286 within 100 km. Distances are from the epicentre to the town centre.
| Place | Distance | Population |
|---|---|---|
| Ōyauchi | 15.2 km WNW | 5,412 |
| Ide | 22.0 km NW | 3,710 |
| Iwaki | 24.1 km WSW | 357,309 |
| Tomioka | 24.4 km NNW | 2,128 |
| Shimokawauchi | 34.5 km NW | 2,044 |
| Namie | 40.5 km NNW | 21,866 |
| Ono-niimachi | 47.5 km WNW | 9,471 |
| Kitakata | 49.0 km W | 5,826 |
| Kitaibaraki | 51.6 km SW | 41,801 |
| Takanuki | 52.4 km W | 4,825 |
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 4.0 17 km WNW of Tomioka, Japan
M 3.8 NEAR EAST COAST OF HONSHU, JAPAN
M 3.3 2 km SSE of Asakawa, Japan
M 4.0 29 km WNW of Iwaki, Japan
M 4.7 77 km E of Tomioka, JapanFelt · 1
M 4.4 90 km ESE of Tomioka, Japan
M 4.3 18 km E of Funaishikawa, JapanFelt · 1
M 3.6 4 km SW of Tokai, Japan
M 3.2 13 km E of Kitaibaraki, Japan
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Frequently asked questions
How strong was the 24 km ENE of Iwaki, Japan earthquake?
Magnitude 4.7 (body-wave magnitude), at a depth of 57.7 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?
Aug 15, 2026, 10:10 AM (local time at the epicentre — UTC+9). In universal time: 2026-08-15 01:10 UTC.
Was it felt?
Felt by 2 people · community intensity II (weak). Felt by a few people at rest, mostly on upper floors.
Was there a tsunami warning?
No tsunami evaluation was flagged for this earthquake.
Which towns are closest to the epicentre?
The closest is Ōyauchi, 15.2 km WNW (population 5,412).
Are earthquakes normal in this area?
Yes. The largest earthquake recorded within 200 km since 1960 was magnitude 9.1 (2011 Great Tohoku Earthquake, 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) and, in Venezuela, FUNVISIS. Populated places and time zones: GeoNames (CC BY 4.0). Preliminary solutions are revised as more observations arrive.