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SeismoAtlas

M2.2 earthquake 10 km WSW of Minamata, Kumamoto, Japan

A magnitude 2.2 earthquake struck 10 km WSW of Minamata, Kumamoto, Japan at 17:55 local time (08:55 UTC) on 11 Sept 2026, at a depth of 10 km, according to JMA. The solution is preliminary and may be revised.

Data: JMA · updated 2026-09-11 08:58 UTC · automatic solution

Magnitude
2.2micro
JMA magnitude (Mj)
Depth
10 km
Status
Automatic
Origin time
2026-09-11 08:55:00 UTC
Local: 11 Sept 2026, 17:55:00 (Asia/Tokyo)
Epicentre
32.200° N, 130.300° 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. 29,42810 kmIIWeak
TakanosuKagoshima, Japan · pop. 9,70511 kmINot felt
IzumiKagoshima, Japan · pop. 51,99415 kmINot felt
AkuneKagoshima, Japan · pop. 25,08922 kmINot felt
AmakusaKumamoto, Japan · pop. 83,08231 kmINot felt
NagasakiJapan · pop. 409,11873 kmINot felt
KagoshimaJapan · pop. 595,04974 kmINot felt
KumamotoJapan · pop. 738,90777 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 Agency2.2 Mj10 km32.20° N, 130.30° 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 30 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.

M2.2 releases about 32× the energy of M1.2, and its waves are about 10× taller on a seismogram. Energy: 30 kg of TNT vs 951 g of TNT.

Each square is the energy of one M1.2. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

21 later earthquakes within 30 km; the largest was M4.0 13 days ago. 7 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.2

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
2.732.610
49.372.310
87.072.30
95.982.510
96.102.30
108.234.010
144.482.30
158.602.30
181.882.510
214.001.510
224.032.50
230.202.110
241.782.210
242.722.00
267.932.510
276.932.210
295.632.210
326.972.810
354.372.20
359.172.10
365.982.20
  1. 4.0Near Minamata, Kumamoto, Japan09-15 21:09
  2. 2.8Near Minamata, Kumamoto, Japan09-24 23:53
  3. 2.611 km N of Sashiki, Kumamoto, Japan09-11 11:39
  4. 2.5Near Minamata, Kumamoto, Japan09-15 08:54
  5. 2.5Near Sashiki, Kumamoto, Japan09-18 22:48
  6. 2.5Near Minamata, Kumamoto, Japan09-20 16:57
  7. 2.5Near Sashiki, Kumamoto, Japan09-22 12:51
  8. 2.3Near Sashiki, Kumamoto, Japan09-13 10:17
  9. 2.3Near Akune, Kagoshima, Japan09-14 23:59
  10. 2.3Near Minamata, Kumamoto, Japan09-15 09:01
  11. 2.311 km N of Sashiki, Kumamoto, Japan09-17 09:24
  12. 2.3Near Minamata, Kumamoto, Japan09-17 23:31
  13. 2.2Near Minamata, Kumamoto, Japan09-21 10:42
  14. 2.2Near Minamata, Kumamoto, Japan09-22 21:51
  15. 2.2Near Minamata, Kumamoto, Japan09-23 16:33
  16. 2.2Near Minamata, Kumamoto, Japan09-26 03:17
  17. 2.2Near Sashiki, Kumamoto, Japan09-26 14:54
  18. 2.1Near Minamata, Kumamoto, Japan09-20 23:07
  19. 2.19 km N of Minamata, Kumamoto, Japan09-26 08:05
  20. 2.09 km N of Minamata, Kumamoto, Japan09-21 11:38
  21. 1.5Near Minamata, Kumamoto, Japan09-20 06:55

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 jma20260911175517. First recorded here 28 Sept 2026, 17:32:06 UTC. Solutions: JMA (jma:20260911175517). Cite as: SeismoAtlas, “M2.2 earthquake 10 km WSW of Minamata, Kumamoto, Japan”, https://seismoatlas.com/earthquake/jma20260911175517-m2-2-earthquake-10-km-wsw-of-minamata-kumamoto-japan, data from JMA.

JSON: /api/v1/events/jma20260911175517. SeismoAtlas is not an official warning service.