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M2.1 earthquake 38 km ESE of Hōlualoa, Hawaii, United States

A magnitude 2.1 earthquake struck 38 km ESE of Hōlualoa, Hawaii, United States at 12:47 local time (22:47 UTC) on 12 Oct 2026, at a depth of 37 km, according to USGS. The solution is preliminary and may be revised.

Data: USGS · updated 2026-10-12 22:51 UTC · automatic solution

Magnitude
2.1micro
duration magnitude (md)
Depth
36.6 km
Status
Automatic
Origin time
2026-10-12 22:47:57 UTC
Local: 12 Oct 2026, 12:47:57 (Pacific/Honolulu)
Epicentre
19.508° N, 155.609° 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. 8,53838 kmINot felt
Kailua-KonaHawaii, United States · pop. 11,97543 kmINot felt
HiloHawaii, United States · pop. 43,26360 kmINot felt
HonoluluHawaii, United States · pop. 350,964308 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.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · HVheadlineHawaiian Volcano Observatory via U.S. Geological Survey2.1 md36.6 km19.51° N, 155.61° W–Automatic

How big was it?

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

It released roughly the energy of 19 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 37 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M2.1 releases about 29× the energy of M1.1, and its waves are about 9.3× taller on a seismogram. Energy: 19 kg of TNT vs 674 g of TNT.

Each square is the energy of one M1.1. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

56 later earthquakes within 30 km; the largest was M3.1 8 days ago. 16 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.1

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
14.022.049
28.581.50
37.001.80
49.272.139
77.381.828
80.062.139
85.161.89
95.971.10
97.241.77
119.842.322
129.021.71
130.131.729
138.680.90
145.992.339
152.441.99
166.841.38
173.472.1-1
193.972.345
197.531.730
198.581.713
214.131.929
218.992.235
229.771.710
236.731.50
236.742.7-1
253.511.83
256.021.829
271.092.3-1
295.261.847
299.782.339
349.182.49
360.492.60
378.701.828
382.261.78
447.531.62
447.571.92
447.821.72
450.171.71
477.740.83
481.091.67
499.942.122
526.041.97
531.911.112
535.312.440
551.203.1-2
551.621.8-2
561.781.77
565.621.76
590.702.441
590.701.923
598.541.60
602.621.928
603.532.117
615.921.950
625.092.18
634.452.50
  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. 2.646 km WSW of Hilo, Hawaii, United States10-27 23:17
  4. 2.547 km SW of Hilo, Hawaii, United States11-08 09:14
  5. 2.442 km ESE of Hōlualoa, Hawaii, United States11-04 06:06
  6. 2.439 km ESE of Hōlualoa, Hawaii, United States10-27 11:58
  7. 2.443 km ESE of Hōlualoa, Hawaii, United States11-06 13:29
  8. 2.343 km ESE of Hōlualoa, Hawaii, United States10-19 00:47
  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. 2.314 km SE of Hōlualoa, Hawaii, United States10-17 22:38
  12. 2.348 km WSW of Hilo, Hawaii, United States10-24 05:53
  13. 2.238 km ESE of Hōlualoa, Hawaii, United States10-22 01:47
  14. 2.138 km SE of Hōlualoa, Hawaii, United States10-16 06:51
  15. 2.117 km SE of Hōlualoa, Hawaii, United States11-02 18:44
  16. 2.152 km WSW of Hawaiian Paradise Park, United States11-07 23:53
  17. 2.128 km SSE of Hōlualoa, Hawaii, United States11-07 02:20
  18. 2.137 km ESE of Hōlualoa, Hawaii, United States10-15 00:04
  19. 2.142 km ESE of Hōlualoa, Hawaii, United States10-20 04:16
  20. 2.044 km SE of Hōlualoa, Hawaii, United States10-13 12:49
  21. 1.951 km ESE of Hōlualoa, Hawaii, United States11-03 20:50
  22. 1.941 km ESE of Hōlualoa, Hawaii, United States11-07 14:43
  23. 1.952 km WSW of Hawaiian Paradise Park, United States10-19 07:14
  24. 1.945 km WSW of Hilo, Hawaii, United States10-31 14:22
  25. 1.958 km SW of Hawaiian Paradise Park, United States11-07 01:25

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 hv75054942. First recorded here 12 Oct 2026, 22:52:46 UTC. Solutions: USGS · HV (usgs:hv75054942). Cite as: SeismoAtlas, “M2.1 earthquake 38 km ESE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75054942-m2-1-earthquake-38-km-ese-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75054942. SeismoAtlas is not an official warning service.