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SeismoAtlas

M2.8 earthquake 70 km SE of Hōlualoa, Hawaii, United States

A magnitude 2.8 earthquake struck 70 km SE of Hōlualoa, Hawaii, United States at 17:28 local time (03:28 UTC) on 18 Sept 2026, at a depth of 14 km, according to USGS.

Data: USGS · updated 2026-09-19 04:05 UTC · reviewed

Magnitude
2.8micro
local magnitude (Richter) (ml)
Depth
13.8 km
Status
Reviewed
Origin time
2026-09-19 03:28:41 UTC
Local: 18 Sept 2026, 17:28:41 (Pacific/Honolulu)
Epicentre
19.169° N, 155.488° 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. 8,53870 kmINot felt
Hawaiian Paradise ParkHawaii, United States · pop. 11,40472 kmINot felt
HiloHawaii, United States · pop. 43,26375 kmINot felt
HonoluluHawaii, United States · pop. 350,964343 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 Survey2.8 ml13.8 km19.17° N, 155.49° W–Reviewed

How big was it?

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

It released roughly the energy of 256 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 14 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M2.8 releases about 34× the energy of M1.8, and its waves are about 10× taller on a seismogram. Energy: 256 kg of TNT vs 8 kg of TNT.

Each square is the energy of one M1.8. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

236 later earthquakes within 30 km; the largest was M3.6 38 days ago. 6 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.8

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
11.942.612
58.622.631
63.021.830
63.492.631
70.171.831
70.681.933
72.381.728
74.501.831
77.621.228
78.891.839
81.711.729
86.872.131
87.152.032
88.031.928
90.831.930
98.691.928
101.871.811
103.121.928
103.172.031
104.211.629
105.982.610
106.891.810
109.361.629
109.461.726
109.482.033
109.961.728
110.111.829
110.131.728
112.171.830
114.341.632
115.391.928
115.641.932
116.782.232
117.251.630
119.212.133
119.361.830
122.271.533
125.321.836
132.051.831
135.982.129
139.062.05
139.141.731
139.491.232
142.421.79
142.721.830
145.381.927
146.581.830
149.491.935
149.961.730
150.302.228
151.741.612
166.761.610
167.881.831
171.081.729
179.951.930
180.572.08
181.841.830
184.212.136
184.222.636
189.102.031
198.191.930
198.691.827
206.491.910
209.191.928
212.881.729
214.882.130
220.151.727
222.861.334
223.131.732
224.112.835
224.161.535
224.471.935
224.891.830
225.052.134
225.271.835
225.421.732
225.971.735
234.812.332
235.931.833
235.982.037
238.691.833
245.221.932
247.331.827
250.181.733
259.791.726
260.331.96
261.231.931
263.181.728
275.562.631
280.061.35
281.831.66
286.571.86
290.881.727
294.641.830
298.132.530
299.132.041
300.431.933
300.771.431
305.871.932
307.011.930
309.451.832
310.051.927
310.971.930
311.662.339
313.811.934
322.151.815
325.441.832
325.581.932
325.971.929
327.951.529
329.871.730
329.961.834
330.301.731
332.201.729
335.531.80
338.561.831
343.861.533
346.881.830
350.312.127
351.991.832
359.641.732
361.781.829
362.631.633
362.661.610
370.221.728
370.531.829
373.531.829
375.361.931
378.451.727
383.901.632
389.541.910
390.881.830
392.801.830
393.053.628
407.401.843
420.401.19
420.411.929
425.351.934
425.981.827
426.971.633
427.752.243
430.361.832
430.451.833
437.401.829
438.591.68
441.081.831
450.831.732
451.581.933
459.351.827
461.672.261
467.491.948
467.571.950
467.651.82
472.341.929
472.801.928
473.102.032
475.331.727
475.411.829
479.001.927
505.551.732
508.011.631
509.021.133
513.601.731
514.661.928
518.481.828
529.321.828
535.301.741
545.991.928
548.821.830
555.831.833
555.981.811
558.221.740
559.201.730
565.091.830
565.541.931
568.881.631
569.461.733
573.341.440
577.551.734
579.901.829
585.342.049
586.481.927
587.001.734
587.901.733
590.381.832
591.781.930
592.321.635
593.041.934
594.242.034
595.871.934
597.132.232
597.641.930
605.232.027
608.321.80
611.711.930
614.311.428
614.451.728
614.551.933
616.221.737
622.680.92
622.692.227
622.711.729
627.132.433
632.891.935
642.051.735
642.751.835
644.271.845
648.701.828
650.881.829
651.541.830
652.302.10
654.781.831
656.481.89
662.031.833
666.371.434
668.201.731
668.561.77
669.202.134
670.981.70
671.782.031
675.312.132
678.221.431
678.641.729
678.921.129
679.911.728
681.091.89
683.061.50
684.511.433
686.961.914
687.862.131
687.921.10
691.441.831
701.451.729
706.171.829
711.001.930
712.853.0-1
  1. 3.643 km SW of Hawaiian Paradise Park, United States10-05 12:31
  2. 3.056 km SSE of Hōlualoa, Hawaii, United States10-18 20:19
  3. 2.869 km SE of Hōlualoa, Hawaii, United States09-28 11:35
  4. 2.667 km SE of Hōlualoa, Hawaii, United States09-21 14:06
  5. 2.655 km SW of Hawaiian Paradise Park, United States09-30 15:02
  6. 2.655 km SW of Hawaiian Paradise Park, United States09-26 19:41
  7. 2.671 km SE of Hōlualoa, Hawaii, United States09-19 15:24
  8. 2.667 km SE of Hōlualoa, Hawaii, United States09-21 18:58
  9. 2.671 km SE of Hōlualoa, Hawaii, United States09-23 13:27
  10. 2.568 km SE of Hōlualoa, Hawaii, United States10-01 13:36
  11. 2.469 km SE of Hōlualoa, Hawaii, United States10-15 06:36
  12. 2.368 km SW of Hawaiian Paradise Park, United States09-28 22:17
  13. 2.373 km SSE of Hōlualoa, Hawaii, United States10-02 03:08
  14. 2.261 km SSE of Hōlualoa, Hawaii, United States10-08 09:08
  15. 2.249 km SW of Hawaiian Paradise Park, United States09-25 09:46
  16. 2.276 km SW of Hawaiian Paradise Park, United States09-24 00:15
  17. 2.266 km SW of Hawaiian Paradise Park, United States10-14 00:36
  18. 2.264 km SW of Hawaiian Paradise Park, United States10-15 02:10
  19. 2.243 km ESE of Hōlualoa, Hawaii, United States10-06 23:13
  20. 2.167 km SE of Hōlualoa, Hawaii, United States09-24 19:27
  21. 2.170 km SE of Hōlualoa, Hawaii, United States09-22 18:21
  22. 2.171 km SE of Hōlualoa, Hawaii, United States09-28 12:31
  23. 2.173 km SW of Hawaiian Paradise Park, United States10-03 17:47
  24. 2.169 km SE of Hōlualoa, Hawaii, United States10-17 00:40
  25. 2.177 km SW of Hawaiian Paradise Park, United States10-17 19:20

Did you feel it?

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Reports on SeismoAtlas

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Event id hv75039922. First recorded here 28 Sept 2026, 17:32:10 UTC. Solutions: USGS · HV (usgs:hv75039922). Cite as: SeismoAtlas, “M2.8 earthquake 70 km SE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75039922-m2-8-earthquake-70-km-se-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75039922. SeismoAtlas is not an official warning service.