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M1.0 earthquake near Honmachi, Kumamoto, Japan

A magnitude 1.0 earthquake struck near Honmachi, Kumamoto, Japan at 21:35 local time (12:35 UTC) on 16 Sept 2026, at a depth of 0 km, according to JMA. The solution is preliminary and may be revised.

Data: JMA · updated 2026-09-16 12:39 UTC · automatic solution

Magnitude
1.0micro
JMA magnitude (Mj)
Depth
0 km
Status
Automatic
Origin time
2026-09-16 12:35:00 UTC
Local: 16 Sept 2026, 21:35:00 (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 kmVIStrong
WakasuKumamoto, Japan · pop. 11,09412 kmINot felt
UkiKumamoto, Japan · pop. 59,92814 kmINot felt
MatsubaseKumamoto, Japan · pop. 26,16318 kmINot felt
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 2 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 Agency1.0 Mj0 km32.50° N, 130.60° E–Automatic

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How big was it?

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

It released roughly the energy of 477 g 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.

The same size.

Each square is the energy of one M1.0. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

22 later earthquakes within 30 km; the largest was M3.5 7 days ago. 11 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.0

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
20.822.30
24.283.210
25.082.910
28.482.520
46.982.310
52.402.810
57.382.510
58.222.510
64.482.710
115.702.310
119.052.00
124.073.50
130.873.010
144.272.510
155.873.310
193.053.010
193.182.710
211.482.00
235.502.10
238.122.60
242.322.20
272.902.810
  1. 3.54 km ESE of Uki, Kumamoto, Japan09-21 16:39
  2. 3.34 km NE of Uto, Kumamoto, Japan09-23 00:27
  3. 3.24 km W of Wakasu, Kumamoto, Japan09-17 12:52
  4. 3.0Near Honmachi, Kumamoto, Japan09-21 23:27
  5. 3.0Near Honmachi, Kumamoto, Japan09-24 13:38
  6. 2.94 km NE of Uto, Kumamoto, Japan09-17 13:40
  7. 2.84 km ESE of Uki, Kumamoto, Japan09-18 16:59
  8. 2.89 km W of Honmachi, Kumamoto, Japan09-27 21:29
  9. 2.74 km NE of Uto, Kumamoto, Japan09-19 05:04
  10. 2.74 km NE of Uto, Kumamoto, Japan09-24 13:46
  11. 2.6Near Honmachi, Kumamoto, Japan09-26 10:42
  12. 2.54 km NE of Uto, Kumamoto, Japan09-17 17:04
  13. 2.54 km NE of Uto, Kumamoto, Japan09-18 21:58
  14. 2.5Near Sashiki, Kumamoto, Japan09-18 22:48
  15. 2.5Near Sashiki, Kumamoto, Japan09-22 12:51
  16. 2.311 km N of Sashiki, Kumamoto, Japan09-17 09:24
  17. 2.3Near Honmachi, Kumamoto, Japan09-18 11:34
  18. 2.3Near Mifune, Kumamoto, Japan09-21 08:17
  19. 2.2Near Sashiki, Kumamoto, Japan09-26 14:54
  20. 2.19 km N of Minamata, Kumamoto, Japan09-26 08:05
  21. 2.09 km N of Minamata, Kumamoto, Japan09-21 11:38
  22. 2.04 km ESE of Uki, Kumamoto, Japan09-25 08:04

Did you feel it?

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Reports on SeismoAtlas

No reports yet.

Event id jma20260916213537. First recorded here 28 Sept 2026, 17:32:06 UTC. Solutions: JMA (jma:20260916213537). Cite as: SeismoAtlas, “M1.0 earthquake near Honmachi, Kumamoto, Japan”, https://seismoatlas.com/earthquake/jma20260916213537-m1-0-earthquake-near-honmachi-kumamoto-japan, data from JMA.

JSON: /api/v1/events/jma20260916213537. SeismoAtlas is not an official warning service.