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SeismoAtlas

M2.3 earthquake near Akune, Kagoshima, Japan

A magnitude 2.3 earthquake struck near Akune, Kagoshima, Japan at 08:59 local time (23:59 UTC) on 15 Sept 2026, at a depth of 0 km, according to JMA. The solution is preliminary and may be revised.

Data: JMA · updated 2026-09-15 00:01 UTC · automatic solution

Magnitude
2.3micro
JMA magnitude (Mj)
Depth
0 km
Status
Automatic
Origin time
2026-09-14 23:59:00 UTC
Local: 15 Sept 2026, 08:59:00 (Asia/Tokyo)
Epicentre
32.000° N, 130.200° 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
AkuneKagoshima, Japan · pop. 25,0892 kmIVLight
IzumiKagoshima, Japan · pop. 51,99418 kmINot felt
SendaiKagoshima, Japan · pop. 92,40322 kmINot felt
TsurudaKagoshima, Japan · pop. 20,24327 kmINot felt
KagoshimaJapan · pop. 595,04958 kmINot felt
NagasakiJapan · pop. 409,11889 kmINot felt
KotōKumamoto, Japan · pop. 543,730101 kmINot felt
KumamotoJapan · pop. 738,907101 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 8 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 Agency2.3 Mj0 km32.00° N, 130.20° 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 0 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

12 later earthquakes within 30 km; the largest was M4.0 13 days ago. 3 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.3

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
8.922.510
9.032.30
21.174.010
71.532.30
126.931.510
136.972.50
143.132.110
154.722.210
189.872.210
208.572.210
239.902.810
267.302.20
  1. 4.0Near Minamata, Kumamoto, Japan09-15 21:09
  2. 2.8Near Minamata, Kumamoto, Japan09-24 23:53
  3. 2.5Near Minamata, Kumamoto, Japan09-15 08:54
  4. 2.5Near Minamata, Kumamoto, Japan09-20 16:57
  5. 2.3Near Minamata, Kumamoto, Japan09-15 09:01
  6. 2.3Near Minamata, Kumamoto, Japan09-17 23:31
  7. 2.2Near Minamata, Kumamoto, Japan09-21 10:42
  8. 2.2Near Minamata, Kumamoto, Japan09-22 21:51
  9. 2.2Near Minamata, Kumamoto, Japan09-23 16:33
  10. 2.2Near Minamata, Kumamoto, Japan09-26 03:17
  11. 2.1Near Minamata, Kumamoto, Japan09-20 23:07
  12. 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 jma20260915085908. First recorded here 28 Sept 2026, 17:32:06 UTC. Solutions: JMA (jma:20260915085908). Cite as: SeismoAtlas, “M2.3 earthquake near Akune, Kagoshima, Japan”, https://seismoatlas.com/earthquake/jma20260915085908-m2-3-earthquake-near-akune-kagoshima-japan, data from JMA.

JSON: /api/v1/events/jma20260915085908. SeismoAtlas is not an official warning service.