Reviewed by USGSJapan4d ago
M5.1 earthquake 88 km NNW of Uken, Japan
Tuesday, September 22, 2026, 10:46:22 UTC · 29.037°N, 128.894°E
A magnitude 5.1 earthquake struck 88 km NNW of Uken, Japan on Tuesday, September 22, 2026, 10:46:22 UTC, at a depth of 10.0 km (shallow). It is the strongest earthquake within 300 km since an M5.1 on September 20, 2026.
- Magnitude
- 5.1
- Moderate · mww
- Depth
- 10 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- —
- No ShakeMap
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquake
In context
How big was it, and why here?
Energy released
674 tons of TNT
That is about 1/22 of the Hiroshima bomb. It released about 1 times the energy of a magnitude 5.0.
Tectonic setting
14 km
from the nearest mapped plate boundary, between the Yangtze and Okinawa plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
10 km
Shallow earthquakes (under 70 km) produce the strongest surface shaking for their size, so they are the ones most likely to cause damage near the epicenter.
Did You Feel It?
Where it was felt
No “Did You Feel It?” reports have been published for this event yet. If you felt it, you can add your report on the USGS website.
I felt it — report to USGS ↗USGS PAGER estimate
Who was exposed to shaking
USGS publishes PAGER impact estimates for significant earthquakes, usually within an hour. No PAGER estimate is available for this event.
After the main event
Aftershocks within 75 km
USGS has not published any M2.5+ earthquake within 75 km since this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 705 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.9108 km NW of Naze, JapanJune 15, 1911 · 15 km NW of this epicenter
- 7.678 km S of Naze, JapanJune 16, 1938 · 163 km S of this epicenter
- 7.4152 km ESE of Koshima, JapanFebruary 1, 1916 · 294 km E of this epicenter
- 7.422 km N of Nishinoomote, JapanJuly 13, 1923 · 294 km NE of this epicenter
- 7.2Ryukyu Islands, JapanJune 24, 1901 · 158 km SE of this epicenter
- 7.2101 km NE of Naze, JapanNovember 5, 1923 · 138 km E of this epicenter
- 7.183 km SE of Naze, JapanOctober 18, 1995 · 176 km SE of this epicenter
- 7.0126 km ESE of Koshima, JapanJuly 18, 1961 · 280 km E of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 10 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 12 recorded deaths. The most severe:
- 1911M8.0
Ryukyu Islands
15 Jun 1911 · 158 km away
12 deathsSevere damage ($5–24M)tsunami
- 1901M7.9
Ryukyu Islands
24 Jun 1901 · 251 km away
Limited damage (under $1M)tsunami
- 1995M7.1
Ryuku Is.
18 Oct 1995 · 176 km away
Limited damage (under $1M)tsunami
- 1916M8.0
Duda
1 Feb 1916 · 258 km away
- 1904M7.9
Kyushu
24 Aug 1904 · 151 km away
- 1926M7.5
Ryukyu Islands
29 Jun 1926 · 293 km away
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.