Skip to content
SeismoAtlas

M2.3 earthquake 14 km SE of Hōlualoa, Hawaii, United States

A magnitude 2.3 earthquake struck 14 km SE of Hōlualoa, Hawaii, United States at 12:38 local time (22:38 UTC) on 17 Oct 2026, at a depth of 22 km, according to USGS.

revised from M2.0

Data: USGS · updated 2026-10-24 01:57 UTC · reviewed

Magnitude
2.3micro
local magnitude (Richter) (ml)
revised from 2.0
Depth
22.5 km
Status
Reviewed
Origin time
2026-10-17 22:38:09 UTC
Local: 17 Oct 2026, 12:38:09 (Pacific/Honolulu)
Epicentre
19.524° N, 155.863° 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. 8,53814 kmINot felt
Kailua-KonaHawaii, United States · pop. 11,97519 kmINot felt
HiloHawaii, United States · pop. 43,26384 kmINot felt
HonoluluHawaii, United States · pop. 350,964288 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 Survey2.3 mlwas 2.022.5 km19.52° N, 155.86° W–Reviewed · 1 revision

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 22 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

23 later earthquakes within 30 km; the largest was M3.1 8 days ago. 7 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.3

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
6.082.117
53.632.1-1
74.142.345
78.741.713
99.162.235
116.901.50
116.902.7-1
179.952.339
229.352.49
367.101.935
380.102.122
401.142.044
412.071.112
415.472.440
431.363.1-2
431.781.8-2
468.182.473
470.862.441
479.512.914
483.702.117
496.091.950
520.922.415
585.921.70
  1. 3.143 km SE of Hōlualoa, Hawaii, United States11-04 21:59
  2. 2.95 km NE of Kalaoa, Hawaii, United States11-06 22:08
  3. 2.742 km ESE of Hōlualoa, Hawaii, United States10-22 19:32
  4. 2.442 km ESE of Hōlualoa, Hawaii, United States11-04 06:06
  5. 2.435 km SSE of Hōlualoa, Hawaii, United States11-08 15:33
  6. 2.429 km SSE of Hōlualoa, Hawaii, United States11-06 10:48
  7. 2.439 km ESE of Hōlualoa, Hawaii, United States10-27 11:58
  8. 2.443 km ESE of Hōlualoa, Hawaii, United States11-06 13:29
  9. 2.342 km ESE of Hōlualoa, Hawaii, United States10-25 10:34
  10. 2.339 km ESE of Hōlualoa, Hawaii, United States10-21 00:46
  11. 2.238 km ESE of Hōlualoa, Hawaii, United States10-22 01:47
  12. 2.135 km SSE of Hōlualoa, Hawaii, United States10-18 04:43
  13. 2.117 km SE of Hōlualoa, Hawaii, United States11-02 18:44
  14. 2.128 km SSE of Hōlualoa, Hawaii, United States11-07 02:20
  15. 2.142 km ESE of Hōlualoa, Hawaii, United States10-20 04:16
  16. 2.028 km SSW of Kailua-Kona, Hawaii, United States11-03 15:46
  17. 1.941 km ESE of Hōlualoa, Hawaii, United States11-07 14:43
  18. 1.9Near Hōlualoa, Hawaii, United States11-02 05:44
  19. 1.842 km SE of Hōlualoa, Hawaii, United States11-04 22:25
  20. 1.724 km SSE of Hōlualoa, Hawaii, United States10-21 05:22
  21. 1.742 km SSE of Hōlualoa, Hawaii, United States11-11 08:33
  22. 1.541 km ESE of Hōlualoa, Hawaii, United States10-22 19:32
  23. 1.123 km E of Hōlualoa, Hawaii, United States11-04 02:42

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 hv75059891. First recorded here 17 Oct 2026, 22:43:09 UTC. Solutions: USGS · HV (usgs:hv75059891). Cite as: SeismoAtlas, “M2.3 earthquake 14 km SE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75059891-m2-3-earthquake-14-km-se-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75059891. SeismoAtlas is not an official warning service.