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M2.9 earthquake near Sashiki, Kumamoto, Japan

A magnitude 2.9 earthquake struck near Sashiki, Kumamoto, Japan at 14:27 local time (05:27 UTC) on 9 Sept 2026, at a depth of 10 km, according to JMA. The solution is preliminary and may be revised.

Data: JMA · updated 2026-09-09 05:30 UTC · automatic solution

Magnitude
2.9micro
JMA magnitude (Mj)
Depth
10 km
Status
Automatic
Origin time
2026-09-09 05:27:00 UTC
Local: 9 Sept 2026, 14:27:00 (Asia/Tokyo)
Epicentre
32.300° N, 130.500° 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
SashikiKumamoto, Japan · pop. 15,6810 kmIIIWeak
MinamataKumamoto, Japan · pop. 29,42813 kmIIWeak
HonmachiKumamoto, Japan · pop. 123,06724 kmIIWeak
HitoyoshiKumamoto, Japan · pop. 38,00625 kmIIWeak
IzumiKagoshima, Japan · pop. 51,99427 kmINot felt
KotōKumamoto, Japan · pop. 543,73058 kmINot felt
KumamotoJapan · pop. 738,90759 kmINot felt
NagasakiJapan · pop. 409,11877 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 10 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 Agency2.9 Mj10 km32.30° N, 130.50° E–Automatic

How big was it?

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

It released roughly the energy of 338 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 10 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M2.9 releases about 32× the energy of M1.9, and its waves are about 10× taller on a seismogram. Energy: 338 kg of TNT vs 11 kg of TNT.

Each square is the energy of one M1.9. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

35 later earthquakes within 30 km; the largest was M4.0 14 days ago. 16 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.9

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.523.010
17.802.90
19.882.510
26.803.10
35.702.510
51.472.210
54.202.610
100.832.310
125.154.00
136.783.010
147.452.510
147.572.30
157.452.610
159.704.010
175.131.00
195.952.30
210.072.30
222.122.310
233.352.510
265.471.510
275.502.50
281.672.110
293.252.210
294.182.00
306.003.010
319.402.510
328.402.210
347.102.210
368.183.010
378.432.810
405.832.20
410.632.10
413.252.60
417.452.20
448.032.810
  1. 4.011 km S of Honmachi, Kumamoto, Japan09-14 10:36
  2. 4.0Near Minamata, Kumamoto, Japan09-15 21:09
  3. 3.1Near Honmachi, Kumamoto, Japan09-10 08:15
  4. 3.09 km W of Honmachi, Kumamoto, Japan09-09 05:58
  5. 3.0Near Honmachi, Kumamoto, Japan09-14 22:14
  6. 3.0Near Honmachi, Kumamoto, Japan09-21 23:27
  7. 3.0Near Honmachi, Kumamoto, Japan09-24 13:38
  8. 2.9Near Honmachi, Kumamoto, Japan09-09 23:15
  9. 2.8Near Minamata, Kumamoto, Japan09-24 23:53
  10. 2.89 km W of Honmachi, Kumamoto, Japan09-27 21:29
  11. 2.611 km N of Sashiki, Kumamoto, Japan09-11 11:39
  12. 2.6Near Honmachi, Kumamoto, Japan09-15 18:54
  13. 2.6Near Honmachi, Kumamoto, Japan09-26 10:42
  14. 2.5Near Honmachi, Kumamoto, Japan09-10 01:20
  15. 2.511 km N of Sashiki, Kumamoto, Japan09-10 17:09
  16. 2.5Near Minamata, Kumamoto, Japan09-15 08:54
  17. 2.5Near Sashiki, Kumamoto, Japan09-18 22:48
  18. 2.5Near Minamata, Kumamoto, Japan09-20 16:57
  19. 2.5Near Sashiki, Kumamoto, Japan09-22 12:51
  20. 2.3Near Sashiki, Kumamoto, Japan09-13 10:17
  21. 2.3Near Minamata, Kumamoto, Japan09-15 09:01
  22. 2.311 km N of Sashiki, Kumamoto, Japan09-17 09:24
  23. 2.3Near Minamata, Kumamoto, Japan09-17 23:31
  24. 2.3Near Honmachi, Kumamoto, Japan09-18 11:34
  25. 2.210 km WSW of Minamata, Kumamoto, Japan09-11 08:55

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 jma20260909142740. First recorded here 28 Sept 2026, 17:32:06 UTC. Solutions: JMA (jma:20260909142740). Cite as: SeismoAtlas, “M2.9 earthquake near Sashiki, Kumamoto, Japan”, https://seismoatlas.com/earthquake/jma20260909142740-m2-9-earthquake-near-sashiki-kumamoto-japan, data from JMA.

JSON: /api/v1/events/jma20260909142740. SeismoAtlas is not an official warning service.