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M2.5 earthquake 11 km N of Sashiki, Kumamoto, Japan

A magnitude 2.5 earthquake struck 11 km N of Sashiki, Kumamoto, Japan at 22:46 local time (13:46 UTC) on 18 Oct 2026, at a depth of 10 km, according to JMA. The solution is preliminary and may be revised.

Data: JMA · updated 2026-10-18 13:49 UTC · automatic solution

Magnitude
2.5micro
JMA magnitude (Mj)
Depth
10 km
Status
Automatic
Origin time
2026-10-18 13:46:00 UTC
Local: 18 Oct 2026, 22:46:00 (Asia/Tokyo)
Epicentre
32.400° 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. 15,68111 kmIIWeak
HonmachiKumamoto, Japan · pop. 123,06715 kmIIWeak
MinamataKumamoto, Japan · pop. 29,42822 kmINot felt
Ōyanomachi-noboritateKumamoto, Japan · pop. 24,56323 kmINot felt
UkiKumamoto, Japan · pop. 59,92829 kmINot felt
KotōKumamoto, Japan · pop. 543,73048 kmINot felt
KumamotoJapan · pop. 738,90749 kmINot felt
NagasakiJapan · pop. 409,11870 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.

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 Agency2.5 Mj10 km32.40° 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 85 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.

M2.5 releases about 32× the energy of M1.5, and its waves are about 10× taller on a seismogram. Energy: 85 kg of TNT vs 3 kg of TNT.

Each square is the energy of one M1.5. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

31 later earthquakes within 30 km; the largest was M4.3 4 days ago. 12 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.5

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
8.472.310
13.872.710
80.982.910
101.852.010
101.871.410
107.752.60
113.282.710
192.802.60
198.051.80
202.132.110
208.773.010
215.382.210
220.772.210
234.522.710
241.133.010
242.302.410
302.772.410
304.553.010
320.402.80
338.583.110
346.802.510
348.183.00
364.071.610
375.402.110
392.702.510
489.623.010
492.124.310
492.582.810
502.022.00
545.472.310
551.622.510
  1. 4.34 km W of Wakasu, Kumamoto, Japan11-08 01:53
  2. 3.1Near Honmachi, Kumamoto, Japan11-01 16:21
  3. 3.0Near Honmachi, Kumamoto, Japan10-27 06:32
  4. 3.04 km W of Wakasu, Kumamoto, Japan10-28 14:54
  5. 3.04 km ESE of Uki, Kumamoto, Japan10-31 06:19
  6. 3.011 km N of Sashiki, Kumamoto, Japan11-02 01:57
  7. 3.0Near Honmachi, Kumamoto, Japan11-07 23:23
  8. 2.911 km S of Honmachi, Kumamoto, Japan10-21 22:45
  9. 2.8Near Honmachi, Kumamoto, Japan10-31 22:10
  10. 2.84 km W of Wakasu, Kumamoto, Japan11-08 02:21
  11. 2.711 km N of Sashiki, Kumamoto, Japan10-19 03:38
  12. 2.79 km N of Minamata, Kumamoto, Japan10-23 07:03
  13. 2.715 km NW of Sashiki, Kumamoto, Japan10-28 08:17
  14. 2.611 km N of Sashiki, Kumamoto, Japan10-23 01:31
  15. 2.6Near Minamata, Kumamoto, Japan10-26 14:34
  16. 2.5Near Sashiki, Kumamoto, Japan11-02 00:34
  17. 2.5Near Honmachi, Kumamoto, Japan11-03 22:28
  18. 2.5Near Sashiki, Kumamoto, Japan11-10 13:23
  19. 2.4Near Sashiki, Kumamoto, Japan10-28 16:04
  20. 2.4Near Sashiki, Kumamoto, Japan10-31 04:32
  21. 2.3Near Sashiki, Kumamoto, Japan10-18 22:14
  22. 2.310 km ESE of Minamata, Kumamoto, Japan11-10 07:14
  23. 2.2Near Minamata, Kumamoto, Japan10-27 13:09
  24. 2.2Near Minamata, Kumamoto, Japan10-27 18:32
  25. 2.19 km N of Minamata, Kumamoto, Japan10-26 23:54

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 jma20261018224626. First recorded here 18 Oct 2026, 13:51:54 UTC. Solutions: JMA (jma:20261018224626). Cite as: SeismoAtlas, “M2.5 earthquake 11 km N of Sashiki, Kumamoto, Japan”, https://seismoatlas.com/earthquake/jma20261018224626-m2-5-earthquake-11-km-n-of-sashiki-kumamoto-japan, data from JMA.

JSON: /api/v1/events/jma20261018224626. SeismoAtlas is not an official warning service.