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M1.8 earthquake 69 km SE of Hōlualoa, Hawaii, United States

A magnitude 1.8 earthquake struck 69 km SE of Hōlualoa, Hawaii, United States at 05:31 local time (15:31 UTC) on 24 Sept 2026, at a depth of 31 km, according to USGS.

Data: USGS · updated 2026-09-24 19:08 UTC · reviewed

Magnitude
1.8micro
local magnitude (Richter) (ml)
Depth
30.9 km
Status
Reviewed
Origin time
2026-09-24 15:31:30 UTC
Local: 24 Sept 2026, 05:31:30 (Pacific/Honolulu)
Epicentre
19.175° N, 155.496° 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. 8,53869 kmINot felt
Hawaiian Paradise ParkHawaii, United States · pop. 11,40472 kmINot felt
HiloHawaii, United States · pop. 43,26375 kmINot felt
HonoluluHawaii, United States · pop. 350,964342 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 Survey1.8 ml30.9 km19.18° 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 7 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 31 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.8 releases about 15× the energy of M1.0, and its waves are about 6× taller on a seismogram. Energy: 7 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

38 later earthquakes within 30 km; the largest was M2.8 10 h ago. 42 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.8

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
3.932.129
7.012.05
7.091.731
7.451.232
10.371.79
10.671.830
13.331.927
14.541.830
17.441.935
17.911.730
18.252.228
19.701.612
34.711.610
35.832.131
39.032.328
47.911.930
48.522.08
49.792.430
52.162.136
52.172.632
57.052.031
66.141.930
66.641.827
74.441.910
77.141.928
80.841.729
82.832.129
88.101.727
90.812.132
91.081.732
92.072.835
92.122.133
92.432.433
92.841.830
93.002.134
93.232.333
93.381.732
93.932.333
  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. 2.167 km SE of Hōlualoa, Hawaii, United States09-24 19:27
  10. 2.171 km SE of Hōlualoa, Hawaii, United States09-28 12:31
  11. 2.172 km SE of Hōlualoa, Hawaii, United States09-28 11:38
  12. 2.164 km SW of Hawaiian Paradise Park, United States09-28 02:21
  13. 2.167 km SW of Hawaiian Paradise Park, United States09-26 03:21
  14. 2.171 km SE of Hōlualoa, Hawaii, United States09-28 10:20
  15. 2.166 km SE of Hōlualoa, Hawaii, United States09-26 19:41
  16. 2.052 km SW of Hawaiian Paradise Park, United States09-24 22:32
  17. 2.057 km ESE of Hōlualoa, Hawaii, United States09-26 16:02
  18. 2.067 km SE of Hōlualoa, Hawaii, United States09-27 00:34
  19. 1.959 km ESE of Hōlualoa, Hawaii, United States09-27 17:58
  20. 1.974 km SW of Hawaiian Paradise Park, United States09-25 04:51
  21. 1.966 km SE of Hōlualoa, Hawaii, United States09-25 08:58
  22. 1.965 km SE of Hōlualoa, Hawaii, United States09-26 15:25
  23. 1.957 km SW of Hawaiian Paradise Park, United States09-27 09:39
  24. 1.965 km SW of Hawaiian Paradise Park, United States09-27 20:39
  25. 1.868 km SE of Hōlualoa, Hawaii, United States09-25 02:11

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Reports on SeismoAtlas

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Event id hv75043262. First recorded here 28 Sept 2026, 17:32:10 UTC. Solutions: USGS · HV (usgs:hv75043262). Cite as: SeismoAtlas, “M1.8 earthquake 69 km SE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75043262-m1-8-earthquake-69-km-se-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75043262. SeismoAtlas is not an official warning service.