M3.1 earthquake 28 km SSW of Hawaiian Paradise Park, United States

A magnitude 3.1 earthquake struck 28 km SSW of Hawaiian Paradise Park, United States at 03:30 local time (13:30 UTC) on 27 Sept 2026, at a depth of 8 km, according to USGS.

7 reports to USGS “Did You Feel It?”

Data: USGS · updated 2026-09-28 13:35 UTC · reviewed

Magnitude: 3.1minor
local magnitude (Richter) (ml)
Depth: 7.6 km
Status: Reviewed
Origin time: 2026-09-27 13:30:35 UTC; Local: 27 Sept 2026, 03:30:35 (Pacific/Honolulu)
Epicentre: 19.364° N, 155.081° 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
Hawaiian Paradise ParkHawaii, United States · pop. 11,404	28 km	IIWeak
HiloHawaii, United States · pop. 43,263	41 km	INot felt
HonoluluHawaii, United States · pop. 350,964	362 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. Likely felt out to about 16 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.

Agency	Magnitude	Depth	Epicentre	Time offset	Status
USGS · HVheadlineHawaiian Volcano Observatory via U.S. Geological Survey	3.1 ml	7.6 km	19.36° N, 155.08° W	–	Reviewed

How big was it?

Often felt by people at rest close to the epicentre, rarely causes damage.

It released roughly the energy of 697 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 8 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

Compare M3.1 with M2.1

M3.1 releases about 33× the energy of M2.1, and its waves are about 10× taller on a seismogram. Energy: 697 kg of TNT vs 21 kg of TNT.

Each square is the energy of one M2.1. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

193 later earthquakes within 30 km; the largest was M3.6 38 days ago. 24 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M3.1

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

Aftershocks
Time after mainshock (hours)	Magnitude	Depth (km)
17.79	2.1	23
41.39	1.9	1
44.15	2.4	6
60.67	1.9	0
62.86	1.7	2
65.10	1.6	3
65.77	2.3	1
78.02	1.3	5
83.44	1.8	0
83.74	1.3	0
83.93	0.8	0
84.24	2.0	0
86.16	1.7	0
86.25	2.1	0
86.28	1.8	0
86.34	1.6	0
86.34	1.6	1
86.39	1.8	0
89.01	1.6	0
89.28	2.5	0
89.28	2.1	1
90.03	2.6	0
90.36	3.4	0
91.51	1.8	0
91.55	1.8	0
91.65	1.9	0
91.72	1.8	0
91.84	2.1	0
91.94	2.4	0
92.03	1.6	0
92.07	1.9	0
92.13	1.0	0
92.14	2.0	0
92.20	2.1	0
92.23	2.2	0
92.28	2.2	0
92.33	2.3	0
92.38	2.1	0
92.40	2.2	-1
92.42	2.5	0
92.51	1.7	0
92.71	1.8	0
92.75	2.3	0
92.93	1.6	1
93.14	2.1	0
93.27	1.6	0
93.37	1.7	0
93.55	1.9	0
93.77	1.8	-1
93.78	1.7	0
93.82	2.1	0
93.85	1.9	0
93.88	1.6	0
94.01	1.9	0
94.22	1.9	0
94.24	1.9	1
94.42	1.4	6
94.60	1.6	0
104.17	1.9	0
104.46	2.0	0
105.57	1.9	0
111.40	1.4	0
114.00	2.0	-1
114.01	1.9	0
115.76	2.2	0
115.76	1.8	1
116.63	0.7	0
116.64	1.6	0
118.94	1.6	2
120.30	1.7	0
120.63	1.8	0
124.42	3.5	0
126.88	2.0	0
131.79	1.8	31
133.28	1.8	0
134.51	1.7	0
140.65	1.7	1
141.54	1.3	-1
144.63	1.3	0
146.30	2.3	1
146.34	2.3	0
148.38	1.5	0
151.74	0.8	1
156.73	1.8	1
165.05	1.3	37
165.21	1.8	44
169.54	2.2	0
169.60	2.1	0
184.45	1.5	7
191.02	3.6	28
225.24	1.5	8
227.05	0.7	27
228.33	1.8	32
228.42	1.8	33
231.15	3.0	8
242.58	1.6	2
254.87	1.6	2
257.34	1.0	26
265.54	1.9	50
270.31	1.9	29
301.33	1.9	1
314.83	1.7	1
317.67	1.9	0
318.63	1.8	1
320.14	1.8	1
325.53	1.7	12
342.42	1.8	6
345.29	0.8	1
345.65	1.6	2
345.87	1.5	2
345.95	1.6	2
345.97	1.8	2
346.06	0.9	1
346.90	1.8	2
349.05	1.8	1
349.56	1.1	37
350.31	1.4	1
367.97	0.5	1
367.97	1.8	2
369.97	1.7	2
371.31	1.4	40
371.64	3.1	6
371.83	0.5	2
375.94	1.6	7
376.24	1.7	5
376.33	1.4	3
379.82	1.2	7
387.60	2.4	2
389.02	0.8	2
389.96	2.7	34
391.64	2.1	2
391.91	2.0	2
395.05	0.9	2
395.40	1.0	1
396.61	1.9	5
400.58	2.0	2
403.15	1.8	40
405.28	1.3	37
405.34	1.8	39
405.43	1.7	38
407.12	1.6	28
420.65	0.9	2
432.63	2.0	2
447.15	1.6	25
449.74	1.6	7
450.52	1.5	2
452.05	1.5	7
453.97	1.9	35
464.78	1.8	0
466.16	1.7	31
473.75	1.7	41
480.82	1.7	7
484.01	2.2	0
484.28	1.0	2
485.35	1.9	0
485.55	1.8	1
485.89	1.3	1
487.39	1.8	0
499.42	1.7	29
504.88	2.1	8
505.03	1.4	8
507.97	2.1	6
508.27	1.7	0
508.83	1.6	2
510.01	1.7	6
513.04	2.2	41
518.62	1.9	29
546.76	1.9	29
547.02	1.8	0
547.16	1.7	36
547.16	1.9	42
565.09	1.4	6
578.31	1.2	3
578.32	1.6	3
608.64	2.2	2
610.11	1.9	7
618.26	1.5	1
628.22	1.6	31
628.33	1.1	30
630.30	1.8	1
633.11	1.8	2
633.45	1.8	38
644.05	1.4	-1
651.63	1.8	38
661.81	1.7	6
676.23	1.2	28
676.38	1.9	37
682.91	2.1	1
683.29	1.9	-1
695.74	1.8	40
701.23	1.8	35
708.18	1.8	41
715.56	1.9	39

Did you feel it?

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Reports on SeismoAtlas

No reports yet.

USGS “Did You Feel It?” has 7 reports: add yours at USGS.

Event id hv75044217. First recorded here 28 Sept 2026, 17:32:08 UTC. Solutions: USGS · HV (usgs:hv75044217). Cite as: SeismoAtlas, “M3.1 earthquake 28 km SSW of Hawaiian Paradise Park, United States”, https://seismoatlas.com/earthquake/hv75044217-m3-1-earthquake-28-km-ssw-of-hawaiian-paradise-park-united-states, data from USGS.

JSON: /api/v1/events/hv75044217. SeismoAtlas is not an official warning service.