M1.8 earthquake 71 km SE of Hōlualoa, Hawaii, United States

Name: M1.8 earthquake 71 km SE of Hōlualoa, Hawaii, United States
Start: 2026-09-25T06:03:43.670Z
End: 2026-09-25T06:03:43.670Z
Location: 71 km SE of Hōlualoa, Hawaii, United States

A magnitude 1.8 earthquake struck 71 km SE of Hōlualoa, Hawaii, United States at 20:03 local time (06:03 UTC) on 24 Sept 2026, at a depth of 30 km, according to USGS.

Data: USGS · updated 2026-09-25 19:45 UTC · reviewed

Magnitude: 1.8micro
local magnitude (Richter) (ml)
Depth: 30 km
Status: Reviewed
Origin time: 2026-09-25 06:03:43 UTC; Local: 24 Sept 2026, 20:03:43 (Pacific/Honolulu)
Epicentre: 19.157° 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
Place	Distance	Est. shaking
HōlualoaHawaii, United States · pop. 8,538	71 km	INot felt
Hawaiian Paradise ParkHawaii, United States · pop. 11,404	73 km	INot felt
HiloHawaii, United States · pop. 43,263	76 km	INot felt
HonoluluHawaii, United States · pop. 350,964	344 km	INot 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.

Agency	Magnitude	Depth	Epicentre	Time offset	Status
USGS · HVheadlineHawaiian Volcano Observatory via U.S. Geological Survey	1.8 ml	30 km	19.16° 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 6 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 30 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

Compare M1.8 with M1.0

M1.8 releases about 13× the energy of M1.0, and its waves are about 5.6× taller on a seismogram. Energy: 6 kg of TNT vs 477 g of TNT.

Each square is the energy of one M1.0. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

31 later earthquakes within 30 km; the largest was M2.8 11 h ago. 50 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.8

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

Aftershocks
Time after mainshock (hours)	Magnitude	Depth (km)
2.91	1.9	35
3.37	1.7	30
3.71	2.2	28
5.16	1.6	12
20.18	1.6	10
21.29	2.1	31
24.50	2.3	28
33.37	1.9	30
33.98	2.0	8
35.26	2.4	30
37.62	2.1	36
37.64	2.6	32
42.52	2.0	31
51.60	1.9	30
52.10	1.8	27
59.91	1.9	10
62.60	1.9	28
66.30	1.7	29
68.30	2.1	29
73.56	1.7	27
76.28	2.1	32
76.55	1.7	32
77.53	2.8	35
77.58	2.1	33
77.89	2.4	33
78.30	1.8	30
78.46	2.1	34
78.69	2.3	33
78.84	1.7	32
79.39	2.3	33
88.22	2.5	32

Did you feel it?

Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.

Reports on SeismoAtlas

No reports yet.

Event id hv75043562. First recorded here 28 Sept 2026, 17:32:10 UTC. Solutions: USGS · HV (usgs:hv75043562). Cite as: SeismoAtlas, “M1.8 earthquake 71 km SE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75043562-m1-8-earthquake-71-km-se-of-holualoa-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75043562. SeismoAtlas is not an official warning service.