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M2.1 earthquake 37 km SW of Hawaiian Paradise Park, United States

A magnitude 2.1 earthquake struck 37 km SW of Hawaiian Paradise Park, United States at 07:28 local time (17:28 UTC) on 18 Oct 2026, at a depth of 6 km, according to USGS.

revised from M2.4

Data: USGS · updated 2026-10-19 18:07 UTC · reviewed

Magnitude
2.1micro
local magnitude (Richter) (ml)
revised from 2.4
Depth
5.8 km
Status
Reviewed
Origin time
2026-10-18 17:28:34 UTC
Local: 18 Oct 2026, 07:28:34 (Pacific/Honolulu)
Epicentre
19.339° N, 155.208° 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
Hawaiian Paradise ParkHawaii, United States · pop. 11,40437 kmINot felt
HiloHawaii, United States · pop. 43,26345 kmINot felt
HonoluluHawaii, United States · pop. 350,964353 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. Likely felt out to about 3 km.

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 2.45.8 km19.34° N, 155.21° 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 25 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 6 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 27× the energy of M1.2, and its waves are about 8.9× taller on a seismogram. Energy: 25 kg of TNT vs 951 g of TNT.

Each square is the energy of one M1.2. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

107 later earthquakes within 30 km; the largest was M2.6 2 days ago. 78 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.1

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.301.70
0.861.62
2.041.76
5.072.241
10.651.929
12.191.830
13.771.99
28.551.931
38.791.929
39.061.80
39.201.736
39.201.942
44.071.828
57.131.46
58.851.730
70.341.23
70.351.63
75.451.929
100.672.22
102.141.97
110.301.51
114.841.83
117.351.829
120.261.631
120.361.130
122.341.81
124.311.9-1
125.151.82
125.481.838
136.081.4-1
143.671.838
153.841.76
156.581.847
168.261.228
168.421.937
174.211.740
174.952.11
175.321.9-1
175.811.931
187.781.840
193.261.835
195.311.828
200.211.841
207.601.939
219.581.325
222.441.230
235.371.233
240.031.828
243.061.47
250.982.026
253.741.929
263.061.41
263.062.01
271.811.930
274.451.84
275.381.91
287.771.90
290.471.928
303.861.79
305.411.829
305.611.430
309.201.92
318.031.72
318.042.22
321.531.846
321.532.052
323.531.836
336.481.827
339.531.829
342.421.67
353.802.02
355.351.829
356.751.726
367.071.927
383.351.731
395.231.931
395.852.02
399.661.329
403.902.02
426.951.76
428.631.830
436.332.51
446.081.529
452.392.028
459.861.60
463.951.928
468.252.338
475.851.930
476.611.93
481.071.929
483.601.329
484.951.930
485.211.928
486.412.18
492.091.842
495.772.50
508.591.932
515.891.811
536.352.629
539.551.732
551.661.732
568.371.727
579.671.93
582.911.929
596.672.036
600.171.928
601.302.129
  1. 2.661 km SW of Hawaiian Paradise Park, United States11-10 01:49
  2. 2.547 km SW of Hilo, Hawaii, United States11-08 09:14
  3. 2.540 km SW of Hawaiian Paradise Park, United States11-05 21:48
  4. 2.346 km SSW of Hawaiian Paradise Park, United States11-07 05:43
  5. 2.247 km SSW of Hawaiian Paradise Park, United States10-18 22:32
  6. 2.239 km SW of Hawaiian Paradise Park, United States10-31 23:31
  7. 2.243 km SW of Hawaiian Paradise Park, United States10-22 22:08
  8. 2.158 km SW of Hawaiian Paradise Park, United States11-12 18:46
  9. 2.152 km WSW of Hawaiian Paradise Park, United States11-07 23:53
  10. 2.137 km SW of Hawaiian Paradise Park, United States10-26 00:25
  11. 2.040 km SW of Hawaiian Paradise Park, United States10-29 16:32
  12. 2.034 km SSW of Hawaiian Paradise Park, United States11-04 13:22
  13. 2.058 km SW of Hawaiian Paradise Park, United States11-06 13:51
  14. 2.039 km SW of Hawaiian Paradise Park, United States11-02 11:16
  15. 2.019 km SW of Hawaiian Paradise Park, United States11-12 14:08
  16. 2.062 km SW of Hawaiian Paradise Park, United States10-29 04:27
  17. 2.056 km SSW of Hawaiian Paradise Park, United States11-01 03:00
  18. 2.040 km SW of Hawaiian Paradise Park, United States11-04 05:19
  19. 1.937 km SW of Hawaiian Paradise Park, United States10-26 00:47
  20. 1.964 km SW of Hawaiian Paradise Park, United States11-12 17:38
  21. 1.962 km SW of Hawaiian Paradise Park, United States11-08 22:04
  22. 1.951 km SW of Hawaiian Paradise Park, United States10-19 04:07
  23. 1.939 km SW of Hawaiian Paradise Park, United States10-31 14:40
  24. 1.952 km WSW of Hawaiian Paradise Park, United States10-19 07:14
  25. 1.954 km SW of Hawaiian Paradise Park, United States10-26 01:17

Did you feel it?

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Reports close 14 days after an earthquake.

Reports on SeismoAtlas

No reports yet.

Event id hv75060471. First recorded here 18 Oct 2026, 17:32:55 UTC. Solutions: USGS · HV (usgs:hv75060471). Cite as: SeismoAtlas, “M2.1 earthquake 37 km SW of Hawaiian Paradise Park, United States”, https://seismoatlas.com/earthquake/hv75060471-m2-1-earthquake-37-km-sw-of-hawaiian-paradise-park-united-states, data from USGS.

JSON: /api/v1/events/hv75060471. SeismoAtlas is not an official warning service.