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M1.6 earthquake 56 km SSE of Hōlualoa, Hawaii, United States

A magnitude 1.6 earthquake struck 56 km SSE of Hōlualoa, Hawaii, United States at 16:14 local time (02:14 UTC) on 25 Sept 2026, at a depth of 10 km, according to USGS.

revised from M1.8

Data: USGS · updated 2026-09-28 19:33 UTC · reviewed

Magnitude
1.6micro
local magnitude (Richter) (ml)
revised from 1.8
Depth
9.7 km
Status
Reviewed
Origin time
2026-09-26 02:14:18 UTC
Local: 25 Sept 2026, 16:14:18 (Pacific/Honolulu)
Epicentre
19.175° N, 155.691° W

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
HōlualoaHawaii, United States · pop. 8,53856 kmINot felt
Kailua-KonaHawaii, United States · pop. 11,97561 kmINot felt
HiloHawaii, United States · pop. 43,26388 kmINot felt
HonoluluHawaii, United States · pop. 350,964328 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 USGS · HV, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · HVheadlineHawaiian Volcano Observatory via U.S. Geological Survey1.6 mlwas 1.89.7 km19.18° N, 155.69° W–Reviewed · 1 revision

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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 5 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.

M1.6 releases about 9.4× the energy of M1.0, and its waves are about 4.5× taller on a seismogram. Energy: 5 kg of TNT vs 477 g of TNT.

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

Aftershocks and nearby activity

20 later earthquakes within 30 km; the largest was M2.8 11 h ago. 35 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.6

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
4.322.328
13.191.930
13.812.08
17.452.136
22.342.031
39.731.910
46.121.729
53.391.727
54.361.96
56.102.132
56.371.732
57.352.835
57.402.133
57.712.433
58.131.830
58.292.134
58.512.333
58.661.732
59.212.333
68.052.532
  1. 2.869 km SE of Hōlualoa, Hawaii, United States09-28 11:35
  2. 2.570 km SW of Hawaiian Paradise Park, United States09-28 22:17
  3. 2.471 km SE of Hōlualoa, Hawaii, United States09-28 11:57
  4. 2.369 km SE of Hōlualoa, Hawaii, United States09-26 06:33
  5. 2.371 km SE of Hōlualoa, Hawaii, United States09-28 12:45
  6. 2.371 km SE of Hōlualoa, Hawaii, United States09-28 13:27
  7. 2.171 km SE of Hōlualoa, Hawaii, United States09-28 12:31
  8. 2.172 km SE of Hōlualoa, Hawaii, United States09-28 11:38
  9. 2.171 km SE of Hōlualoa, Hawaii, United States09-28 10:20
  10. 2.166 km SE of Hōlualoa, Hawaii, United States09-26 19:41
  11. 2.057 km ESE of Hōlualoa, Hawaii, United States09-26 16:02
  12. 2.067 km SE of Hōlualoa, Hawaii, United States09-27 00:34
  13. 1.959 km ESE of Hōlualoa, Hawaii, United States09-27 17:58
  14. 1.928 km SSE of Hōlualoa, Hawaii, United States09-28 08:36
  15. 1.965 km SE of Hōlualoa, Hawaii, United States09-26 15:25
  16. 1.873 km SE of Hōlualoa, Hawaii, United States09-28 12:21
  17. 1.769 km SW of Hawaiian Paradise Park, United States09-28 00:21
  18. 1.767 km SE of Hōlualoa, Hawaii, United States09-28 07:37
  19. 1.773 km SE of Hōlualoa, Hawaii, United States09-28 10:36
  20. 1.773 km SE of Hōlualoa, Hawaii, United States09-28 12:54

Did you feel it?

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Reports on SeismoAtlas

No reports yet.

Event id hv75043817. First recorded here 28 Sept 2026, 17:32:09 UTC. Solutions: USGS · HV (usgs:hv75043817). Cite as: SeismoAtlas, “M1.6 earthquake 56 km SSE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75043817-m1-6-earthquake-56-km-sse-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75043817. SeismoAtlas is not an official warning service.