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SeismoAtlas

M2.1 earthquake 67 km SE of Hōlualoa, Hawaii, United States

A magnitude 2.1 earthquake struck 67 km SE of Hōlualoa, Hawaii, United States at 15:28 local time (01:28 UTC) on 30 Oct 2026, at a depth of 32 km, according to USGS.

revised from M2.5

Data: USGS · updated 2026-11-02 20:23 UTC · reviewed

Magnitude
2.1micro
local magnitude (Richter) (ml)
revised from 2.5
Depth
31.8 km
Status
Reviewed
Origin time
2026-10-31 01:28:02 UTC
Local: 30 Oct 2026, 15:28:02 (Pacific/Honolulu)
Epicentre
19.207° N, 155.489° 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. 8,53867 kmINot felt
Hawaiian Paradise ParkHawaii, United States · pop. 11,40469 kmINot felt
HiloHawaii, United States · pop. 43,26372 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 Survey2.1 mlwas 2.531.8 km19.21° N, 155.49° 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 24 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 32 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 35× the energy of M1.1, and its waves are about 11× taller on a seismogram. Energy: 24 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

112 later earthquakes within 30 km; the largest was M3.1 8 days ago. 53 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.1

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
3.501.830
6.571.931
6.592.00
7.861.79
7.911.930
9.371.932
9.421.829
9.611.430
9.711.934
10.371.636
10.412.130
13.211.92
15.501.71
25.541.846
25.542.052
29.071.932
29.201.930
31.302.432
31.601.728
32.151.828
38.111.913
40.491.827
40.841.829
43.541.829
46.431.67
47.531.331
59.361.829
60.761.726
62.201.831
62.231.732
71.081.927
74.421.726
84.071.829
87.361.731
91.371.97
98.931.729
99.241.931
99.862.02
100.642.440
103.671.329
109.731.828
116.533.1-2
116.951.8-2
121.202.132
122.991.933
123.161.829
127.111.77
129.891.731
130.951.76
132.641.830
138.571.739
140.571.732
150.091.529
150.211.830
150.751.733
156.032.441
156.031.923
156.402.028
162.071.729
163.871.60
167.961.928
174.121.830
179.861.930
180.621.93
181.251.950
182.351.928
182.831.730
185.081.929
187.611.329
188.961.930
189.221.928
190.422.18
192.041.933
196.101.842
199.782.50
203.191.911
207.391.831
208.081.929
212.601.932
219.551.736
219.551.935
219.562.344
219.832.040
220.142.612
220.331.713
226.192.531
226.242.231
235.251.929
240.362.629
241.831.929
243.561.732
245.541.930
249.452.131
250.591.736
251.021.829
251.401.931
255.671.732
256.251.829
259.601.827
259.711.930
269.921.530
271.601.727
272.381.727
286.921.929
291.051.731
295.271.931
302.651.828
304.181.928
304.481.736
305.312.129
305.822.629
307.391.729
  1. 3.143 km SE of Hōlualoa, Hawaii, United States11-04 21:59
  2. 2.667 km SE of Hōlualoa, Hawaii, United States11-12 19:17
  3. 2.672 km SE of Hōlualoa, Hawaii, United States11-09 05:36
  4. 2.661 km SW of Hawaiian Paradise Park, United States11-10 01:49
  5. 2.547 km SW of Hilo, Hawaii, United States11-08 09:14
  6. 2.567 km SE of Hōlualoa, Hawaii, United States11-09 11:39
  7. 2.442 km ESE of Hōlualoa, Hawaii, United States11-04 06:06
  8. 2.468 km SE of Hōlualoa, Hawaii, United States11-01 08:46
  9. 2.443 km ESE of Hōlualoa, Hawaii, United States11-06 13:29
  10. 2.368 km SE of Hōlualoa, Hawaii, United States11-09 05:01
  11. 2.267 km SE of Hōlualoa, Hawaii, United States11-09 11:42
  12. 2.158 km SW of Hawaiian Paradise Park, United States11-12 18:46
  13. 2.174 km SW of Hawaiian Paradise Park, United States11-10 10:55
  14. 2.170 km SW of Hawaiian Paradise Park, United States11-05 02:40
  15. 2.152 km WSW of Hawaiian Paradise Park, United States11-07 23:53
  16. 2.175 km SW of Hawaiian Paradise Park, United States10-31 11:52
  17. 2.067 km SW of Hawaiian Paradise Park, United States10-31 08:03
  18. 2.058 km SW of Hawaiian Paradise Park, United States11-06 13:51
  19. 2.072 km SW of Hawaiian Paradise Park, United States11-09 05:17
  20. 2.056 km SSW of Hawaiian Paradise Park, United States11-01 03:00
  21. 2.040 km SW of Hawaiian Paradise Park, United States11-04 05:19
  22. 1.964 km SW of Hawaiian Paradise Park, United States11-12 17:38
  23. 1.975 km SW of Hawaiian Paradise Park, United States10-31 10:49
  24. 1.951 km ESE of Hōlualoa, Hawaii, United States11-03 20:50
  25. 1.941 km ESE of Hōlualoa, Hawaii, United States11-07 14:43

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Reports on SeismoAtlas

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Event id hv75066446. First recorded here 31 Oct 2026, 01:32:31 UTC. Solutions: USGS · HV (usgs:hv75066446). Cite as: SeismoAtlas, “M2.1 earthquake 67 km SE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75066446-m2-1-earthquake-67-km-se-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75066446. SeismoAtlas is not an official warning service.