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SeismoAtlas

M2.3 earthquake near Mifune, Kumamoto, Japan

A magnitude 2.3 earthquake struck near Mifune, Kumamoto, Japan at 00:52 local time (15:52 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 2026-09-10 15:55 UTC · automatic solution

Magnitude
2.3micro
JMA magnitude (Mj)
Depth
10 km
Status
Automatic
Origin time
2026-09-10 15:52:00 UTC
Local: 11 Sept 2026, 00:52:00 (Asia/Tokyo)
Epicentre
32.700° N, 130.800° 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
MifuneKumamoto, Japan · pop. 16,9013 kmIIWeak
IwashitaKumamoto, Japan · pop. 10,1326 kmIIWeak
ShimadaKumamoto, Japan · pop. 32,5107 kmIIWeak
KotōKumamoto, Japan · pop. 543,73010 kmIIWeak
UtoKumamoto, Japan · pop. 37,44212 kmINot felt
MatsubaseKumamoto, Japan · pop. 26,16313 kmINot felt
KumamotoJapan · pop. 738,90716 kmINot felt
KurumeFukuoka, Japan · pop. 303,57974 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 Agency2.3 Mj10 km32.70° N, 130.80° 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 43 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.

M2.3 releases about 32× the energy of M1.3, and its waves are about 10× taller on a seismogram. Energy: 43 kg of TNT vs 1 kg of TNT.

Each square is the energy of one M1.3. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

22 later earthquakes within 30 km; the largest was M4.5 3 days ago. 12 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.3

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
9.252.810
102.373.010
123.032.610
140.721.00
165.003.210
165.802.910
169.202.520
187.702.310
193.122.810
198.102.510
205.202.710
256.422.310
264.783.50
271.583.010
296.583.310
333.773.010
333.902.710
352.202.00
369.654.510
369.852.910
370.483.610
378.832.60
  1. 4.55 km NNE of Shimada, Kumamoto, Japan09-26 01:31
  2. 3.65 km NNE of Shimada, Kumamoto, Japan09-26 02:21
  3. 3.54 km ESE of Uki, Kumamoto, Japan09-21 16:39
  4. 3.34 km NE of Uto, Kumamoto, Japan09-23 00:27
  5. 3.24 km W of Wakasu, Kumamoto, Japan09-17 12:52
  6. 3.0Near Honmachi, Kumamoto, Japan09-14 22:14
  7. 3.0Near Honmachi, Kumamoto, Japan09-21 23:27
  8. 3.0Near Honmachi, Kumamoto, Japan09-24 13:38
  9. 2.94 km NE of Uto, Kumamoto, Japan09-17 13:40
  10. 2.95 km NNE of Shimada, Kumamoto, Japan09-26 01:43
  11. 2.8Near Mifune, Kumamoto, Japan09-11 01:07
  12. 2.84 km ESE of Uki, Kumamoto, Japan09-18 16:59
  13. 2.74 km NE of Uto, Kumamoto, Japan09-19 05:04
  14. 2.74 km NE of Uto, Kumamoto, Japan09-24 13:46
  15. 2.6Near Honmachi, Kumamoto, Japan09-15 18:54
  16. 2.6Near Honmachi, Kumamoto, Japan09-26 10:42
  17. 2.54 km NE of Uto, Kumamoto, Japan09-17 17:04
  18. 2.54 km NE of Uto, Kumamoto, Japan09-18 21:58
  19. 2.3Near Honmachi, Kumamoto, Japan09-18 11:34
  20. 2.3Near Mifune, Kumamoto, Japan09-21 08:17
  21. 2.04 km ESE of Uki, Kumamoto, Japan09-25 08:04
  22. 1.0Near Honmachi, Kumamoto, Japan09-16 12:35

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 jma20260911005233. First recorded here 28 Sept 2026, 17:32:06 UTC. Solutions: JMA (jma:20260911005233). Cite as: SeismoAtlas, “M2.3 earthquake near Mifune, Kumamoto, Japan”, https://seismoatlas.com/earthquake/jma20260911005233-m2-3-earthquake-near-mifune-kumamoto-japan, data from JMA.

JSON: /api/v1/events/jma20260911005233. SeismoAtlas is not an official warning service.