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SeismoAtlas

M2.7 earthquake 4 km ESE of Uki, Kumamoto, Japan

A magnitude 2.7 earthquake struck 4 km ESE of Uki, Kumamoto, Japan at 23:23 local time (14:23 UTC) on 1 Sept 2026, at a depth of 0 km, according to JMA. The solution is preliminary and may be revised.

Data: JMA · updated 2026-09-01 14:26 UTC · automatic solution

Magnitude
2.7micro
JMA magnitude (Mj)
Depth
0 km
Status
Automatic
Origin time
2026-09-01 14:23:00 UTC
Local: 1 Sept 2026, 23:23:00 (Asia/Tokyo)
Epicentre
32.600° N, 130.700° E

Circles show this event and others within 30 km from 7 days before to 30 days after. Lines: plate boundaries and GEM active faults. Open on the live map

Nearby places

Distance and estimated shaking at nearby places
PlaceDistanceEst. shaking
UkiKumamoto, Japan · pop. 59,9284 kmIVLight
WakasuKumamoto, Japan · pop. 11,0946 kmIVLight
MatsubaseKumamoto, Japan · pop. 26,1636 kmIIIWeak
UtoKumamoto, Japan · pop. 37,4429 kmIIIWeak
HonmachiKumamoto, Japan · pop. 123,06715 kmIIWeak
KotōKumamoto, Japan · pop. 543,73021 kmIIWeak
KumamotoJapan · pop. 738,90723 kmIIWeak
NagasakiJapan · pop. 409,11879 kmINot felt

Shaking is an estimate from the intensity prediction equation of Allen, Wald & Worden (2012), not an observation. Local ground and buildings can change it by a level or more. Likely felt out to about 12 km.

Every agency's solution

Agencies locate earthquakes with their own stations and methods, so their numbers differ. We match reports of the same event by time, distance and magnitude and show them side by side. The headline uses JMA.

AgencyMagnitudeDepthEpicentreTime offsetStatus
JMAheadlineJMA via Japan Meteorological Agency2.7 Mj0 km32.60° N, 130.70° E–Automatic

How big was it?

Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.

It released roughly the energy of 169 kg of TNT. Magnitude is logarithmic: each whole step means about 32 times more energy and 10 times larger waves on a seismogram. Depth matters too: at 0 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M2.7 releases about 32× the energy of M1.7, and its waves are about 10× taller on a seismogram. Energy: 169 kg of TNT vs 5 kg of TNT.

Each square is the energy of one M1.7. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

46 later earthquakes within 30 km; the largest was M4.5 2 days ago. 4 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.7

46 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
1.582.310
30.523.210
33.352.510
41.502.110
60.522.910
63.902.910
69.282.910
88.103.110
90.052.40
112.932.50
143.973.810
158.523.510
165.653.310
173.932.810
183.583.010
200.872.90
202.952.510
209.873.10
217.482.310
218.772.510
226.732.810
237.272.610
308.224.00
319.853.010
340.522.610
358.201.00
379.022.30
382.483.210
383.282.910
386.682.520
405.182.310
410.602.810
415.582.510
422.682.710
473.902.310
482.273.50
489.073.010
514.073.310
551.253.010
551.382.710
569.682.00
587.134.510
587.332.910
587.973.610
596.322.60
631.102.810
  1. 4.55 km NNE of Shimada, Kumamoto, Japan09-26 01:31
  2. 4.011 km S of Honmachi, Kumamoto, Japan09-14 10:36
  3. 3.8Near Honmachi, Kumamoto, Japan09-07 14:21
  4. 3.65 km NNE of Shimada, Kumamoto, Japan09-26 02:21
  5. 3.59 km W of Honmachi, Kumamoto, Japan09-08 04:54
  6. 3.54 km ESE of Uki, Kumamoto, Japan09-21 16:39
  7. 3.3Near Honmachi, Kumamoto, Japan09-08 12:02
  8. 3.34 km NE of Uto, Kumamoto, Japan09-23 00:27
  9. 3.211 km N of Sashiki, Kumamoto, Japan09-02 20:54
  10. 3.24 km W of Wakasu, Kumamoto, Japan09-17 12:52
  11. 3.1Near Honmachi, Kumamoto, Japan09-05 06:29
  12. 3.1Near Honmachi, Kumamoto, Japan09-10 08:15
  13. 3.09 km W of Honmachi, Kumamoto, Japan09-09 05:58
  14. 3.0Near Honmachi, Kumamoto, Japan09-14 22:14
  15. 3.0Near Honmachi, Kumamoto, Japan09-21 23:27
  16. 3.0Near Honmachi, Kumamoto, Japan09-24 13:38
  17. 2.9Near Honmachi, Kumamoto, Japan09-04 02:54
  18. 2.94 km ESE of Uki, Kumamoto, Japan09-04 06:17
  19. 2.9Near Honmachi, Kumamoto, Japan09-04 11:40
  20. 2.9Near Honmachi, Kumamoto, Japan09-09 23:15
  21. 2.94 km NE of Uto, Kumamoto, Japan09-17 13:40
  22. 2.95 km NNE of Shimada, Kumamoto, Japan09-26 01:43
  23. 2.8Near Honmachi, Kumamoto, Japan09-08 20:19
  24. 2.8Near Mifune, Kumamoto, Japan09-11 01:07
  25. 2.84 km ESE of Uki, Kumamoto, Japan09-18 16:59

Did you feel it?

Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.

Reports close 14 days after an earthquake.

Reports on SeismoAtlas

No reports yet.

Event id jma20260901232344. First recorded here 28 Sept 2026, 17:32:06 UTC. Solutions: JMA (jma:20260901232344). Cite as: SeismoAtlas, “M2.7 earthquake 4 km ESE of Uki, Kumamoto, Japan”, https://seismoatlas.com/earthquake/jma20260901232344-m2-7-earthquake-4-km-ese-of-uki-kumamoto-japan, data from JMA.

JSON: /api/v1/events/jma20260901232344. SeismoAtlas is not an official warning service.