Skip to content
SeismoAtlas

M2.5 earthquake 9 km N of Minamata, Kumamoto, Japan

A magnitude 2.5 earthquake struck 9 km N of Minamata, Kumamoto, Japan at 18:17 local time (09:17 UTC) on 16 Oct 2026, at a depth of 10 km, according to JMA. The solution is preliminary and may be revised.

Data: JMA · updated 2026-10-16 09:20 UTC · automatic solution

Magnitude
2.5micro
JMA magnitude (Mj)
Depth
10 km
Status
Automatic
Origin time
2026-10-16 09:17:00 UTC
Local: 16 Oct 2026, 18:17:00 (Asia/Tokyo)
Epicentre
32.300° N, 130.400° 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
MinamataKumamoto, Japan · pop. 29,4289 kmIIWeak
SashikiKumamoto, Japan · pop. 15,6819 kmIIWeak
IzumiKagoshima, Japan · pop. 51,99425 kmINot felt
AmakusaKumamoto, Japan · pop. 83,08227 kmINot felt
Hondomachi-hondoKumamoto, Japan · pop. 40,78728 kmINot felt
KotōKumamoto, Japan · pop. 543,73063 kmINot felt
KumamotoJapan · pop. 738,90763 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 km32.30° N, 130.40° 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

30 later earthquakes within 30 km; the largest was M3.1 11 days ago. 14 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.5

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
37.982.910
52.482.510
60.952.310
66.352.710
133.472.910
154.332.010
154.351.410
160.232.60
165.772.710
245.282.60
250.531.80
254.622.110
261.253.010
267.872.210
273.252.210
287.002.710
294.782.410
355.252.410
372.882.80
391.073.110
399.282.510
400.673.00
416.551.610
427.882.110
445.182.510
466.183.110
475.982.810
542.103.010
597.952.310
604.102.510
  1. 3.1Near Honmachi, Kumamoto, Japan11-01 16:21
  2. 3.1Near Takanosu, Kagoshima, Japan11-04 19:28
  3. 3.0Near Honmachi, Kumamoto, Japan10-27 06:32
  4. 3.011 km N of Sashiki, Kumamoto, Japan11-02 01:57
  5. 3.0Near Honmachi, Kumamoto, Japan11-07 23:23
  6. 2.99 km N of Minamata, Kumamoto, Japan10-17 23:16
  7. 2.911 km S of Honmachi, Kumamoto, Japan10-21 22:45
  8. 2.8Near Honmachi, Kumamoto, Japan10-31 22:10
  9. 2.8Near Takanosu, Kagoshima, Japan11-05 05:16
  10. 2.711 km N of Sashiki, Kumamoto, Japan10-19 03:38
  11. 2.79 km N of Minamata, Kumamoto, Japan10-23 07:03
  12. 2.715 km NW of Sashiki, Kumamoto, Japan10-28 08:17
  13. 2.611 km N of Sashiki, Kumamoto, Japan10-23 01:31
  14. 2.6Near Minamata, Kumamoto, Japan10-26 14:34
  15. 2.511 km N of Sashiki, Kumamoto, Japan10-18 13:46
  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 jma20261016181738. First recorded here 16 Oct 2026, 09:22:51 UTC. Solutions: JMA (jma:20261016181738). Cite as: SeismoAtlas, “M2.5 earthquake 9 km N of Minamata, Kumamoto, Japan”, https://seismoatlas.com/earthquake/jma20261016181738-m2-5-earthquake-9-km-n-of-minamata-kumamoto-japan, data from JMA.

JSON: /api/v1/events/jma20261016181738. SeismoAtlas is not an official warning service.