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M2.2 earthquake 16 km ESE of Waimea, Hawaii, United States

A magnitude 2.2 earthquake struck 16 km ESE of Waimea, Hawaii, United States at 04:48 local time (14:48 UTC) on 22 Sept 2026, at a depth of 44 km, according to USGS.

Data: USGS · updated 2026-09-23 03:17 UTC · reviewed

Magnitude
2.2micro
local magnitude (Richter) (ml)
Depth
43.8 km
Status
Reviewed
Origin time
2026-09-22 14:48:06 UTC
Local: 22 Sept 2026, 04:48:06 (Pacific/Honolulu)
Epicentre
19.974° N, 155.523° 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
WaimeaHawaii, United States · pop. 9,21216 kmINot felt
HiloHawaii, United States · pop. 43,26353 kmINot felt
KīheiHawaii, United States · pop. 20,881130 kmINot felt
KahuluiHawaii, United States · pop. 26,337142 kmINot felt
HonoluluHawaii, United States · pop. 350,964285 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 Survey2.2 ml43.8 km19.97° N, 155.52° W–Reviewed

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How big was it?

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

It released roughly the energy of 32 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 44 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M2.2 releases about 34× the energy of M1.2, and its waves are about 10× taller on a seismogram. Energy: 32 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

5 later earthquakes within 30 km; the largest was M2.9 2 days ago. 2 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.2

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.341.832
1.511.813
63.411.726
82.272.410
93.182.914
  1. 2.930 km NNW of Hilo, Hawaii, United States09-26 11:58
  2. 2.48 km SE of Waimea, Hawaii, United States09-26 01:04
  3. 1.813 km E of Waimea, Hawaii, United States09-22 15:08
  4. 1.821 km SSE of Waimea, Hawaii, United States09-22 16:18
  5. 1.721 km SSE of Waimea, Hawaii, United States09-25 06:12

Did you feel it?

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Reports on SeismoAtlas

No reports yet.

Event id hv75041927. First recorded here 28 Sept 2026, 17:32:12 UTC. Solutions: USGS · HV (usgs:hv75041927). Cite as: SeismoAtlas, “M2.2 earthquake 16 km ESE of Waimea, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75041927-m2-2-earthquake-16-km-ese-of-waimea-hawaii-united-states, data from USGS.

JSON: /api/v1/events/hv75041927. SeismoAtlas is not an official warning service.