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M2.5 earthquake near Honmachi, Kumamoto, Japan

A magnitude 2.5 earthquake struck near Honmachi, Kumamoto, Japan at 16:19 local time (07:19 UTC) on 6 Sept 2026, at a depth of 0 km, according to JMA. The solution is preliminary and may be revised.

Data: JMA · updated 2026-09-06 07:22 UTC · automatic solution

Magnitude
2.5micro
JMA magnitude (Mj)
Depth
0 km
Status
Automatic
Origin time
2026-09-06 07:19:00 UTC
Local: 6 Sept 2026, 16:19:00 (Asia/Tokyo)
Epicentre
32.500° N, 130.600° 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
HonmachiKumamoto, Japan · pop. 123,0670 kmXExtreme
WakasuKumamoto, Japan · pop. 11,09412 kmIIWeak
UkiKumamoto, Japan · pop. 59,92814 kmIIWeak
MatsubaseKumamoto, Japan · pop. 26,16318 kmIIWeak
Ōyanomachi-noboritateKumamoto, Japan · pop. 24,56319 kmINot felt
KotōKumamoto, Japan · pop. 543,73034 kmINot felt
KumamotoJapan · pop. 738,90735 kmINot felt
NagasakiJapan · pop. 409,11873 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 9 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 Agency2.5 Mj0 km32.50° N, 130.60° 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 0 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

41 later earthquakes within 30 km; the largest was M4.0 14 days ago. 15 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.5

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
31.033.810
45.583.510
52.723.310
55.352.610
61.002.810
70.132.910
70.653.010
87.932.90
90.022.510
96.933.10
104.552.310
105.832.510
113.802.810
124.332.610
170.972.310
195.284.00
206.923.010
227.582.610
245.271.00
266.082.30
269.553.210
270.352.910
273.752.520
292.252.310
297.672.810
302.652.510
303.482.510
309.752.710
360.972.310
364.322.00
369.333.50
376.133.010
389.532.510
401.133.310
438.323.010
438.452.710
456.752.00
480.772.10
483.382.60
487.582.20
518.172.810
  1. 4.011 km S of Honmachi, Kumamoto, Japan09-14 10:36
  2. 3.8Near Honmachi, Kumamoto, Japan09-07 14:21
  3. 3.59 km W of Honmachi, Kumamoto, Japan09-08 04:54
  4. 3.54 km ESE of Uki, Kumamoto, Japan09-21 16:39
  5. 3.3Near Honmachi, Kumamoto, Japan09-08 12:02
  6. 3.34 km NE of Uto, Kumamoto, Japan09-23 00:27
  7. 3.24 km W of Wakasu, Kumamoto, Japan09-17 12:52
  8. 3.1Near Honmachi, Kumamoto, Japan09-10 08:15
  9. 3.09 km W of Honmachi, Kumamoto, Japan09-09 05:58
  10. 3.0Near Honmachi, Kumamoto, Japan09-14 22:14
  11. 3.0Near Honmachi, Kumamoto, Japan09-21 23:27
  12. 3.0Near Honmachi, Kumamoto, Japan09-24 13:38
  13. 2.9Near Sashiki, Kumamoto, Japan09-09 05:27
  14. 2.9Near Honmachi, Kumamoto, Japan09-09 23:15
  15. 2.94 km NE of Uto, Kumamoto, Japan09-17 13:40
  16. 2.8Near Honmachi, Kumamoto, Japan09-08 20:19
  17. 2.8Near Mifune, Kumamoto, Japan09-11 01:07
  18. 2.84 km ESE of Uki, Kumamoto, Japan09-18 16:59
  19. 2.89 km W of Honmachi, Kumamoto, Japan09-27 21:29
  20. 2.74 km NE of Uto, Kumamoto, Japan09-19 05:04
  21. 2.74 km NE of Uto, Kumamoto, Japan09-24 13:46
  22. 2.615 km NW of Sashiki, Kumamoto, Japan09-08 14:40
  23. 2.611 km N of Sashiki, Kumamoto, Japan09-11 11:39
  24. 2.6Near Honmachi, Kumamoto, Japan09-15 18:54
  25. 2.6Near Honmachi, Kumamoto, Japan09-26 10:42

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 jma20260906161929. First recorded here 28 Sept 2026, 17:32:06 UTC. Solutions: JMA (jma:20260906161929). Cite as: SeismoAtlas, “M2.5 earthquake near Honmachi, Kumamoto, Japan”, https://seismoatlas.com/earthquake/jma20260906161929-m2-5-earthquake-near-honmachi-kumamoto-japan, data from JMA.

JSON: /api/v1/events/jma20260906161929. SeismoAtlas is not an official warning service.