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M4.1 earthquake 71 km SE of Hōlualoa, Hawaii, United States

A magnitude 4.1 earthquake struck 71 km SE of Hōlualoa, Hawaii, United States at 20:36 local time (06:36 UTC) on 17 Sept 2026, at a depth of 12 km, according to USGS.

106 reports to USGS “Did You Feel It?”

Data: USGS · updated 2026-09-19 21:03 UTC · reviewed

Magnitude
4.1light
local magnitude (Richter) (ml)
Depth
12.4 km
Status
Reviewed
Origin time
2026-09-18 06:36:43 UTC
Local: 17 Sept 2026, 20:36:43 (Pacific/Honolulu)
Epicentre
19.158° N, 155.476° 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. 8,53871 kmIIWeak
Hawaiian Paradise ParkHawaii, United States · pop. 11,40472 kmIIWeak
HiloHawaii, United States · pop. 43,26375 kmIIWeak
HonoluluHawaii, United States · pop. 350,964345 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 45 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 Survey4.1 ml12.4 km19.16° N, 155.48° W–Reviewed

How big was it?

Widely felt near the epicentre: rattling windows and objects. Significant damage is unlikely.

It released roughly the energy of 19 t 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 12 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M4.1 releases about 28× the energy of M3.1, and its waves are about 9.1× taller on a seismogram. Energy: 19 t of TNT vs 674 kg of TNT.

Each square is the energy of one M3.1. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

80 later earthquakes within 30 km; the largest was M3.0 10 days ago. 4 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M4.1

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
2.822.510
4.723.014
20.872.814
32.802.612
79.492.631
83.891.830
84.362.631
91.031.831
91.541.933
93.241.728
95.371.831
98.491.228
99.761.839
102.581.729
107.742.131
108.022.032
108.901.928
111.701.930
119.561.928
122.741.811
123.981.928
124.042.031
125.071.629
126.852.610
127.761.810
130.231.629
130.321.726
130.352.033
130.821.728
130.981.829
130.991.728
133.041.830
135.201.632
136.261.928
136.511.932
137.652.232
138.121.630
140.082.133
140.231.830
143.141.533
146.181.836
152.911.831
156.842.129
159.932.05
160.001.731
160.361.232
163.291.79
163.591.830
166.251.927
167.451.830
170.361.935
170.821.730
171.162.228
172.611.612
187.631.83
188.742.131
191.952.328
200.821.930
201.432.05
202.712.430
205.072.136
205.092.632
209.972.031
219.051.930
219.551.827
227.361.910
230.051.928
233.751.729
235.752.129
241.011.727
243.732.132
244.001.732
244.982.835
245.032.133
245.342.433
245.751.830
245.912.134
246.142.333
246.291.732
246.842.333
  1. 3.070 km SE of Hōlualoa, Hawaii, United States09-18 11:19
  2. 2.870 km SE of Hōlualoa, Hawaii, United States09-19 03:28
  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. 2.652 km SW of Hawaiian Paradise Park, United States09-26 19:41
  6. 2.671 km SE of Hōlualoa, Hawaii, United States09-19 15:24
  7. 2.667 km SE of Hōlualoa, Hawaii, United States09-21 18:58
  8. 2.671 km SE of Hōlualoa, Hawaii, United States09-23 13:27
  9. 2.570 km SE of Hōlualoa, Hawaii, United States09-18 09:26
  10. 2.471 km SE of Hōlualoa, Hawaii, United States09-28 11:57
  11. 2.457 km SW of Hawaiian Paradise Park, United States09-26 17:19
  12. 2.369 km SE of Hōlualoa, Hawaii, United States09-26 06:33
  13. 2.371 km SE of Hōlualoa, Hawaii, United States09-28 12:45
  14. 2.371 km SE of Hōlualoa, Hawaii, United States09-28 13:27
  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. 2.167 km SE of Hōlualoa, Hawaii, United States09-24 19:27
  18. 2.170 km SE of Hōlualoa, Hawaii, United States09-22 18:21
  19. 2.171 km SE of Hōlualoa, Hawaii, United States09-28 12:31
  20. 2.172 km SE of Hōlualoa, Hawaii, United States09-28 11:38
  21. 2.164 km SW of Hawaiian Paradise Park, United States09-28 02:21
  22. 2.167 km SW of Hawaiian Paradise Park, United States09-26 03:21
  23. 2.171 km SE of Hōlualoa, Hawaii, United States09-28 10:20
  24. 2.171 km SE of Hōlualoa, Hawaii, United States09-24 02:41
  25. 2.166 km SE of Hōlualoa, Hawaii, United States09-26 19:41

Did you feel it?

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Reports on SeismoAtlas

No reports yet.

USGS “Did You Feel It?” has 106 reports: add yours at USGS.

Event id hv75039212. First recorded here 28 Sept 2026, 17:32:11 UTC. Solutions: USGS · HV (usgs:hv75039212). Cite as: SeismoAtlas, “M4.1 earthquake 71 km SE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75039212-m4-1-earthquake-71-km-se-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75039212. SeismoAtlas is not an official warning service.