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SeismoAtlas

M2.3 earthquake 43 km ESE of Hōlualoa, Hawaii, United States

A magnitude 2.3 earthquake struck 43 km ESE of Hōlualoa, Hawaii, United States at 14:47 local time (00:47 UTC) on 18 Oct 2026, at a depth of 39 km, according to USGS.

Data: USGS · updated 2026-10-19 19:40 UTC · reviewed

Magnitude
2.3micro
local magnitude (Richter) (ml)
Depth
38.6 km
Status
Reviewed
Origin time
2026-10-19 00:47:26 UTC
Local: 18 Oct 2026, 14:47:26 (Pacific/Honolulu)
Epicentre
19.437° N, 155.588° 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. 8,53843 kmINot felt
Kailua-KonaHawaii, United States · pop. 11,97549 kmINot felt
HiloHawaii, United States · pop. 43,26361 kmINot felt
HonoluluHawaii, United States · pop. 350,964315 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 ml38.6 km19.44° N, 155.59° W–Reviewed

How big was it?

Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.

It released roughly the energy of 49 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 39 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 36× the energy of M1.3, and its waves are about 11× taller on a seismogram. Energy: 49 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

97 later earthquakes within 30 km; the largest was M3.1 8 days ago. 35 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.3

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
3.341.929
4.871.830
6.451.99
12.561.833
14.761.731
20.851.38
21.241.931
27.482.1-1
30.391.930
31.481.929
47.982.345
51.541.730
52.591.713
68.141.929
73.002.235
83.781.710
90.741.50
90.752.7-1
99.731.75
107.521.83
110.031.829
114.991.428
118.501.830
122.671.86
122.701.97
125.102.3-1
144.581.99
146.241.928
149.271.847
153.792.339
160.951.228
161.991.830
168.501.931
170.301.731
190.051.829
203.192.49
210.052.530
214.502.60
215.131.230
228.061.233
232.711.828
236.271.78
254.642.232
287.341.832
288.682.132
295.262.00
298.101.829
298.291.430
301.541.62
301.581.92
301.831.72
304.181.71
317.881.930
319.982.432
331.750.83
335.101.67
336.201.331
353.952.122
380.051.97
385.921.112
389.322.440
392.341.329
405.213.1-2
405.631.8-2
415.791.77
419.631.76
421.321.830
429.251.732
438.891.830
442.032.473
444.712.441
444.711.923
452.551.60
456.631.928
457.542.117
468.541.930
469.301.93
469.931.950
471.031.928
471.511.730
476.291.329
477.641.930
479.092.18
488.462.50
514.862.531
514.922.231
534.211.930
544.351.732
544.921.829
548.281.827
548.391.930
558.591.530
559.761.70
575.591.929
583.951.931
592.851.928
594.492.629
  1. 3.143 km SE of Hōlualoa, Hawaii, United States11-04 21:59
  2. 2.742 km ESE of Hōlualoa, Hawaii, United States10-22 19:32
  3. 2.667 km SE of Hōlualoa, Hawaii, United States11-12 19:17
  4. 2.646 km WSW of Hilo, Hawaii, United States10-27 23:17
  5. 2.566 km SE of Hōlualoa, Hawaii, United States10-27 18:50
  6. 2.547 km SW of Hilo, Hawaii, United States11-08 09:14
  7. 2.567 km SE of Hōlualoa, Hawaii, United States11-09 11:39
  8. 2.442 km ESE of Hōlualoa, Hawaii, United States11-04 06:06
  9. 2.468 km SE of Hōlualoa, Hawaii, United States11-01 08:46
  10. 2.429 km SSE of Hōlualoa, Hawaii, United States11-06 10:48
  11. 2.439 km ESE of Hōlualoa, Hawaii, United States10-27 11:58
  12. 2.443 km ESE of Hōlualoa, Hawaii, United States11-06 13:29
  13. 2.342 km ESE of Hōlualoa, Hawaii, United States10-25 10:34
  14. 2.339 km ESE of Hōlualoa, Hawaii, United States10-21 00:46
  15. 2.348 km WSW of Hilo, Hawaii, United States10-24 05:53
  16. 2.268 km SE of Hōlualoa, Hawaii, United States10-29 15:25
  17. 2.238 km ESE of Hōlualoa, Hawaii, United States10-22 01:47
  18. 2.267 km SE of Hōlualoa, Hawaii, United States11-09 11:42
  19. 2.167 km SE of Hōlualoa, Hawaii, United States10-31 01:28
  20. 2.117 km SE of Hōlualoa, Hawaii, United States11-02 18:44
  21. 2.152 km WSW of Hawaiian Paradise Park, United States11-07 23:53
  22. 2.128 km SSE of Hōlualoa, Hawaii, United States11-07 02:20
  23. 2.142 km ESE of Hōlualoa, Hawaii, United States10-20 04:16
  24. 2.067 km SW of Hawaiian Paradise Park, United States10-31 08:03
  25. 1.964 km SW of Hawaiian Paradise Park, United States11-12 17:38

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 hv75060631. First recorded here 19 Oct 2026, 19:42:19 UTC. Solutions: USGS · HV (usgs:hv75060631). Cite as: SeismoAtlas, “M2.3 earthquake 43 km ESE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75060631-m2-3-earthquake-43-km-ese-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75060631. SeismoAtlas is not an official warning service.