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M1.9 earthquake 66 km SE of Hōlualoa, Hawaii, United States

A magnitude 1.9 earthquake struck 66 km SE of Hōlualoa, Hawaii, United States at 22:58 local time (08:58 UTC) on 24 Sept 2026, at a depth of 35 km, according to USGS.

Data: USGS · updated 2026-09-25 19:29 UTC · reviewed

Magnitude
1.9micro
local magnitude (Richter) (ml)
Depth
35.1 km
Status
Reviewed
Origin time
2026-09-25 08:58:09 UTC
Local: 24 Sept 2026, 22:58:09 (Pacific/Honolulu)
Epicentre
19.202° N, 155.502° 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. 8,53866 kmINot felt
Hawaiian Paradise ParkHawaii, United States · pop. 11,40471 kmINot felt
HiloHawaii, United States · pop. 43,26373 kmINot felt
HonoluluHawaii, United States · pop. 350,964340 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 Survey1.9 ml35.1 km19.20° N, 155.50° W–Reviewed

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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 9 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 35 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.9 releases about 19× the energy of M1.0, and its waves are about 7.1× taller on a seismogram. Energy: 9 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

29 later earthquakes within 30 km; the largest was M2.8 10 h ago. 50 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.9

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.461.730
0.812.228
2.251.612
17.271.610
18.392.131
21.592.328
30.461.930
31.072.08
32.352.430
34.722.136
34.732.632
39.612.031
48.691.930
49.191.827
57.001.910
59.701.928
63.391.729
65.392.129
70.661.727
73.372.132
73.641.732
74.622.835
74.672.133
74.982.433
75.401.830
75.562.134
75.782.333
75.931.732
76.482.333
  1. 2.869 km SE of Hōlualoa, Hawaii, United States09-28 11:35
  2. 2.652 km SW of Hawaiian Paradise Park, United States09-26 19:41
  3. 2.471 km SE of Hōlualoa, Hawaii, United States09-28 11:57
  4. 2.457 km SW of Hawaiian Paradise Park, United States09-26 17:19
  5. 2.369 km SE of Hōlualoa, Hawaii, United States09-26 06:33
  6. 2.371 km SE of Hōlualoa, Hawaii, United States09-28 12:45
  7. 2.371 km SE of Hōlualoa, Hawaii, United States09-28 13:27
  8. 2.249 km SW of Hawaiian Paradise Park, United States09-25 09:46
  9. 2.171 km SE of Hōlualoa, Hawaii, United States09-28 12:31
  10. 2.172 km SE of Hōlualoa, Hawaii, United States09-28 11:38
  11. 2.164 km SW of Hawaiian Paradise Park, United States09-28 02:21
  12. 2.167 km SW of Hawaiian Paradise Park, United States09-26 03:21
  13. 2.171 km SE of Hōlualoa, Hawaii, United States09-28 10:20
  14. 2.166 km SE of Hōlualoa, Hawaii, United States09-26 19:41
  15. 2.057 km ESE of Hōlualoa, Hawaii, United States09-26 16:02
  16. 2.067 km SE of Hōlualoa, Hawaii, United States09-27 00:34
  17. 1.959 km ESE of Hōlualoa, Hawaii, United States09-27 17:58
  18. 1.965 km SE of Hōlualoa, Hawaii, United States09-26 15:25
  19. 1.957 km SW of Hawaiian Paradise Park, United States09-27 09:39
  20. 1.965 km SW of Hawaiian Paradise Park, United States09-27 20:39
  21. 1.855 km WSW of Hawaiian Paradise Park, United States09-27 10:09
  22. 1.873 km SE of Hōlualoa, Hawaii, United States09-28 12:21
  23. 1.769 km SW of Hawaiian Paradise Park, United States09-28 00:21
  24. 1.758 km WSW of Hawaiian Paradise Park, United States09-25 09:26
  25. 1.767 km SE of Hōlualoa, Hawaii, United States09-28 07:37

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Reports on SeismoAtlas

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Event id hv75043597. First recorded here 28 Sept 2026, 17:32:10 UTC. Solutions: USGS · HV (usgs:hv75043597). Cite as: SeismoAtlas, “M1.9 earthquake 66 km SE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75043597-m1-9-earthquake-66-km-se-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75043597. SeismoAtlas is not an official warning service.