M2.1 earthquake 66 km SE of Hōlualoa, Hawaii, United States
A magnitude 2.1 earthquake struck 66 km SE of Hōlualoa, Hawaii, United States at 09:41 local time (19:41 UTC) on 26 Sept 2026, at a depth of 36 km, according to USGS.
revised from M2.5
Data: USGS · updated 2026-09-28 17:36 UTC · reviewed
- Magnitude
- 2.1micro
local magnitude (Richter) (ml)
revised from 2.5 - Depth
- 35.6 km
- Status
- Reviewed
- Origin time
- 2026-09-26 19:41:06 UTC
- Local: 26 Sept 2026, 09:41:06 (Pacific/Honolulu)
- Epicentre
- 19.217° N, 155.484° 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
| Place | Distance | Est. shaking |
|---|---|---|
| HōlualoaHawaii, United States · pop. 8,538 | 66 km | INot felt |
| Hawaiian Paradise ParkHawaii, United States · pop. 11,404 | 68 km | INot felt |
| HiloHawaii, United States · pop. 43,263 | 70 km | INot felt |
| HonoluluHawaii, United States · pop. 350,964 | 340 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 | 2.1 mlwas 2.5 | 35.6 km | 19.22° N, 155.48° W | – | Reviewed · 1 revision |
How big was it?
Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.
It released roughly the energy of 19 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 36 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.
M2.1 releases about 28× the energy of M1.1, and its waves are about 9.1× taller on a seismogram. Energy: 19 kg of TNT vs 674 g of TNT.
Each square is the energy of one M1.1. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
313 later earthquakes within 30 km; the largest was M3.6 38 days ago. 60 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M2.1
313 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 0.01 | 2.6 | 36 |
| 4.89 | 2.0 | 31 |
| 9.32 | 1.0 | 2 |
| 13.98 | 1.9 | 30 |
| 14.48 | 1.8 | 27 |
| 22.28 | 1.9 | 10 |
| 24.98 | 1.9 | 28 |
| 28.68 | 1.7 | 29 |
| 30.67 | 2.1 | 30 |
| 35.94 | 1.7 | 27 |
| 38.65 | 1.3 | 34 |
| 38.92 | 1.7 | 32 |
| 39.91 | 2.8 | 35 |
| 39.96 | 1.5 | 35 |
| 40.27 | 1.9 | 35 |
| 40.68 | 1.8 | 30 |
| 40.84 | 2.1 | 34 |
| 41.07 | 1.8 | 35 |
| 41.22 | 1.7 | 32 |
| 41.77 | 1.7 | 35 |
| 50.60 | 2.3 | 32 |
| 51.72 | 1.8 | 33 |
| 51.78 | 2.0 | 37 |
| 54.48 | 1.8 | 33 |
| 59.22 | 1.9 | 1 |
| 60.34 | 1.6 | -1 |
| 61.01 | 1.9 | 32 |
| 63.12 | 1.8 | 27 |
| 65.97 | 1.7 | 33 |
| 75.59 | 1.7 | 26 |
| 76.12 | 1.9 | 6 |
| 77.02 | 1.9 | 31 |
| 78.97 | 1.7 | 28 |
| 80.68 | 1.7 | 2 |
| 82.93 | 1.6 | 3 |
| 83.60 | 1.8 | -1 |
| 84.42 | 2.2 | -3 |
| 85.31 | 2.2 | -1 |
| 91.35 | 2.6 | 31 |
| 95.85 | 1.3 | 5 |
| 97.62 | 1.6 | 6 |
| 101.26 | 1.8 | 0 |
| 101.56 | 1.3 | 0 |
| 101.76 | 0.8 | 0 |
| 102.06 | 2.0 | 0 |
| 102.37 | 1.8 | 6 |
| 103.98 | 1.7 | 0 |
| 104.07 | 2.1 | 0 |
| 104.11 | 1.8 | 0 |
| 104.17 | 1.6 | 0 |
| 104.17 | 1.6 | 1 |
| 104.21 | 1.8 | 0 |
| 106.67 | 1.7 | 27 |
| 109.96 | 1.0 | 0 |
| 110.43 | 1.8 | 30 |
| 113.92 | 2.5 | 30 |
| 114.92 | 2.0 | 41 |
| 116.22 | 1.9 | 33 |
| 116.56 | 1.4 | 31 |
| 122.80 | 1.9 | 30 |
| 125.25 | 1.8 | 32 |
| 125.84 | 1.9 | 27 |
| 126.77 | 1.9 | 30 |
| 129.61 | 1.9 | 34 |
| 136.77 | 1.6 | 2 |
| 137.95 | 1.8 | 15 |
| 141.23 | 1.8 | 32 |
| 141.37 | 1.9 | 32 |
| 141.76 | 1.9 | 29 |
| 143.75 | 1.5 | 29 |
| 145.66 | 1.7 | 30 |
| 145.75 | 1.8 | 34 |
| 146.09 | 1.7 | 31 |
| 147.99 | 1.7 | 29 |
| 151.32 | 1.8 | 0 |
| 154.35 | 1.8 | 31 |
| 158.47 | 1.7 | 1 |
| 159.36 | 1.3 | -1 |
| 159.65 | 1.5 | 33 |
| 162.67 | 1.8 | 30 |
| 166.10 | 2.1 | 27 |
| 167.79 | 1.8 | 32 |
| 169.57 | 0.8 | 1 |
| 175.43 | 1.7 | 32 |
| 177.57 | 1.8 | 29 |
| 178.43 | 1.6 | 33 |
| 178.45 | 1.6 | 10 |
| 186.01 | 1.7 | 28 |
| 186.33 | 1.8 | 29 |
| 189.32 | 1.8 | 29 |
| 189.56 | 2.5 | 42 |
| 191.16 | 1.9 | 31 |
| 194.25 | 1.7 | 27 |
| 199.70 | 1.6 | 32 |
| 205.33 | 1.9 | 10 |
| 206.67 | 1.8 | 30 |
| 207.17 | 1.7 | 38 |
| 208.59 | 1.8 | 30 |
| 208.84 | 3.6 | 28 |
| 211.60 | 2.1 | 27 |
| 223.19 | 1.8 | 43 |
| 233.18 | 1.6 | 0 |
| 236.19 | 1.1 | 9 |
| 236.21 | 1.9 | 29 |
| 241.14 | 1.9 | 34 |
| 241.77 | 1.8 | 27 |
| 242.76 | 1.6 | 33 |
| 243.54 | 2.2 | 43 |
| 246.15 | 1.8 | 32 |
| 246.24 | 1.8 | 33 |
| 253.19 | 1.8 | 29 |
| 254.38 | 1.6 | 8 |
| 256.88 | 1.8 | 31 |
| 260.40 | 1.6 | 2 |
| 262.88 | 2.4 | 42 |
| 266.62 | 1.7 | 32 |
| 267.37 | 1.9 | 33 |
| 270.63 | 1.8 | 2 |
| 272.70 | 1.6 | 2 |
| 275.14 | 1.8 | 27 |
| 277.46 | 2.2 | 61 |
| 278.27 | 1.7 | 42 |
| 283.28 | 1.9 | 48 |
| 283.36 | 1.9 | 50 |
| 283.44 | 1.8 | 2 |
| 288.13 | 1.9 | 29 |
| 288.59 | 1.9 | 28 |
| 288.90 | 2.0 | 32 |
| 291.12 | 1.7 | 27 |
| 291.20 | 1.8 | 29 |
| 294.79 | 1.9 | 27 |
| 319.15 | 1.9 | 1 |
| 321.34 | 1.7 | 32 |
| 323.81 | 1.6 | 31 |
| 324.82 | 1.1 | 33 |
| 325.27 | 2.2 | 41 |
| 329.39 | 1.7 | 31 |
| 330.46 | 1.9 | 28 |
| 332.65 | 1.7 | 1 |
| 334.27 | 1.8 | 28 |
| 335.36 | 1.9 | 42 |
| 335.50 | 1.9 | 0 |
| 336.46 | 1.8 | 1 |
| 345.11 | 1.8 | 28 |
| 351.10 | 1.7 | 41 |
| 353.58 | 2.1 | 32 |
| 361.79 | 1.9 | 28 |
| 363.11 | 0.8 | 1 |
| 363.47 | 1.6 | 2 |
| 363.70 | 1.5 | 2 |
| 363.78 | 1.6 | 2 |
| 363.79 | 1.8 | 2 |
| 363.88 | 0.9 | 1 |
| 364.61 | 1.8 | 30 |
| 364.73 | 1.8 | 2 |
| 366.87 | 1.8 | 1 |
| 368.14 | 1.4 | 1 |
| 371.62 | 1.8 | 33 |
| 371.77 | 1.8 | 11 |
| 374.02 | 1.7 | 40 |
| 375.00 | 1.7 | 30 |
| 380.89 | 1.8 | 30 |
| 381.33 | 1.9 | 31 |
| 384.67 | 1.6 | 31 |
| 385.25 | 1.7 | 33 |
| 385.79 | 0.5 | 1 |
| 385.79 | 1.8 | 2 |
| 387.80 | 1.7 | 2 |
| 389.13 | 1.4 | 40 |
| 393.34 | 1.7 | 34 |
| 395.69 | 1.8 | 29 |
| 401.13 | 2.0 | 49 |
| 402.27 | 1.9 | 27 |
| 402.79 | 1.7 | 34 |
| 403.70 | 1.7 | 33 |
| 405.42 | 2.4 | 2 |
| 406.18 | 1.8 | 32 |
| 406.84 | 0.8 | 2 |
| 407.58 | 1.9 | 30 |
| 408.12 | 1.6 | 35 |
| 408.83 | 1.9 | 34 |
| 409.46 | 2.1 | 2 |
| 410.04 | 2.0 | 34 |
| 411.66 | 1.9 | 34 |
| 412.88 | 0.9 | 2 |
| 412.92 | 2.2 | 32 |
| 413.22 | 1.0 | 1 |
| 413.43 | 1.9 | 30 |
| 415.69 | 1.5 | 0 |
| 418.40 | 2.0 | 2 |
| 421.02 | 2.0 | 27 |
| 424.11 | 1.8 | 0 |
| 427.51 | 1.9 | 30 |
| 430.10 | 1.4 | 28 |
| 430.24 | 1.7 | 28 |
| 430.34 | 1.9 | 33 |
| 432.01 | 1.7 | 37 |
| 438.48 | 0.9 | 2 |
| 438.49 | 2.2 | 27 |
| 438.51 | 1.7 | 29 |
| 442.92 | 2.4 | 33 |
| 448.68 | 1.9 | 35 |
| 450.45 | 2.0 | 2 |
| 457.84 | 1.7 | 35 |
| 458.54 | 1.8 | 35 |
| 460.06 | 1.8 | 45 |
| 464.49 | 1.8 | 28 |
| 466.67 | 1.8 | 29 |
| 467.18 | 2.1 | 39 |
| 467.34 | 1.8 | 30 |
| 468.09 | 2.1 | 0 |
| 468.34 | 1.5 | 2 |
| 470.58 | 1.8 | 31 |
| 472.28 | 1.8 | 9 |
| 477.82 | 1.8 | 33 |
| 482.16 | 1.4 | 34 |
| 482.60 | 1.8 | 0 |
| 483.09 | 1.1 | 0 |
| 483.99 | 1.7 | 31 |
| 484.35 | 1.7 | 7 |
| 484.99 | 2.1 | 34 |
| 486.77 | 1.7 | 0 |
| 487.57 | 2.0 | 31 |
| 491.10 | 2.1 | 32 |
| 494.01 | 1.4 | 31 |
| 494.43 | 1.7 | 29 |
| 494.71 | 1.1 | 29 |
| 495.71 | 1.7 | 28 |
| 496.88 | 1.8 | 9 |
| 498.85 | 1.5 | 0 |
| 500.30 | 1.4 | 33 |
| 503.17 | 1.9 | 0 |
| 503.37 | 1.8 | 1 |
| 503.66 | 2.1 | 31 |
| 503.71 | 1.1 | 0 |
| 503.72 | 1.3 | 1 |
| 505.21 | 1.8 | 0 |
| 507.23 | 1.8 | 31 |
| 517.25 | 1.7 | 29 |
| 522.70 | 2.1 | 8 |
| 525.79 | 0.9 | 0 |
| 526.09 | 1.7 | 0 |
| 526.79 | 1.9 | 30 |
| 528.65 | 3.0 | -1 |
| 533.11 | 2.3 | 39 |
| 536.44 | 1.9 | 29 |
| 537.98 | 1.8 | 30 |
| 539.56 | 1.9 | 9 |
| 545.66 | 1.8 | 33 |
| 547.86 | 1.7 | 31 |
| 553.95 | 1.3 | 8 |
| 554.34 | 1.9 | 31 |
| 560.59 | 2.1 | -1 |
| 561.07 | 2.3 | 37 |
| 563.49 | 1.9 | 30 |
| 564.58 | 1.9 | 29 |
| 569.86 | 1.8 | 28 |
| 570.03 | 1.9 | 31 |
| 572.84 | 2.8 | 34 |
| 581.09 | 2.3 | 45 |
| 584.65 | 1.7 | 30 |
| 594.49 | 1.2 | 34 |
| 601.25 | 1.9 | 29 |
| 613.89 | 1.6 | 32 |
| 613.94 | 1.8 | 29 |
| 614.48 | 2.1 | 32 |
| 615.02 | 1.8 | 29 |
| 616.88 | 1.7 | 10 |
| 617.54 | 1.9 | 33 |
| 617.78 | 1.9 | 35 |
| 618.14 | 1.9 | 35 |
| 618.33 | 1.8 | 35 |
| 621.28 | 1.7 | 35 |
| 622.62 | 1.7 | 33 |
| 623.85 | 1.5 | 0 |
| 623.85 | 2.7 | -1 |
| 626.46 | 2.2 | 2 |
| 626.58 | 1.8 | 30 |
| 632.83 | 1.7 | 5 |
| 634.04 | 1.8 | 40 |
| 636.09 | 1.5 | 1 |
| 636.14 | 1.8 | 31 |
| 640.63 | 1.8 | 3 |
| 641.23 | 2.0 | 30 |
| 642.59 | 2.2 | 29 |
| 643.14 | 1.8 | 29 |
| 644.19 | 3.3 | 29 |
| 645.75 | 2.0 | 32 |
| 646.05 | 1.6 | 31 |
| 646.15 | 1.1 | 30 |
| 648.09 | 1.4 | 28 |
| 650.10 | 1.9 | -1 |
| 650.94 | 1.8 | 2 |
| 651.61 | 1.8 | 30 |
| 655.78 | 1.8 | 6 |
| 655.80 | 1.9 | 7 |
| 660.76 | 1.9 | 49 |
| 661.87 | 1.4 | -1 |
| 676.41 | 1.9 | 36 |
| 676.52 | 1.9 | 40 |
| 677.68 | 1.9 | 9 |
| 678.51 | 2.1 | 33 |
| 679.35 | 1.9 | 28 |
| 682.37 | 1.8 | 47 |
| 682.61 | 2.1 | 32 |
| 686.90 | 2.3 | 39 |
| 694.05 | 1.2 | 28 |
| 695.10 | 1.8 | 30 |
| 700.00 | 1.7 | 40 |
| 701.60 | 1.9 | 31 |
| 703.41 | 1.7 | 31 |
| 705.60 | 1.8 | 32 |
| 713.86 | 2.1 | 29 |
- 3.643 km SW of Hawaiian Paradise Park, United States10-05 12:31
- 3.369 km SE of Hōlualoa, Hawaii, United States10-23 15:52
- 3.056 km SSE of Hōlualoa, Hawaii, United States10-18 20:19
- 2.875 km SW of Hawaiian Paradise Park, United States10-20 16:31
- 2.869 km SE of Hōlualoa, Hawaii, United States09-28 11:35
- 2.742 km ESE of Hōlualoa, Hawaii, United States10-22 19:32
- 2.655 km SW of Hawaiian Paradise Park, United States09-30 15:02
- 2.655 km SW of Hawaiian Paradise Park, United States09-26 19:41
- 2.542 km ESE of Hōlualoa, Hawaii, United States10-04 17:15
- 2.568 km SE of Hōlualoa, Hawaii, United States10-01 13:36
- 2.469 km SE of Hōlualoa, Hawaii, United States10-15 06:36
- 2.439 km SW of Hawaiian Paradise Park, United States10-13 17:06
- 2.442 km ESE of Hōlualoa, Hawaii, United States10-07 18:33
- 2.368 km SW of Hawaiian Paradise Park, United States09-28 22:17
- 2.343 km ESE of Hōlualoa, Hawaii, United States10-19 00:47
- 2.342 km ESE of Hōlualoa, Hawaii, United States10-25 10:34
- 2.339 km ESE of Hōlualoa, Hawaii, United States10-21 00:46
- 2.374 km SW of Hawaiian Paradise Park, United States10-20 04:45
- 2.241 km SE of Hōlualoa, Hawaii, United States09-30 08:59
- 2.261 km SSE of Hōlualoa, Hawaii, United States10-08 09:08
- 2.270 km SE of Hōlualoa, Hawaii, United States10-23 14:16
- 2.266 km SW of Hawaiian Paradise Park, United States10-14 00:36
- 2.242 km ESE of Hōlualoa, Hawaii, United States09-30 08:06
- 2.264 km SW of Hawaiian Paradise Park, United States10-15 02:10
- 2.243 km ESE of Hōlualoa, Hawaii, United States10-06 23:13
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Event id hv75043997. First recorded here 28 Sept 2026, 17:32:09 UTC. Solutions: USGS · HV (usgs:hv75043997). Cite as: SeismoAtlas, “M2.1 earthquake 66 km SE of Hōlualoa, Hawaii, United States”, https://seismoatlas.com/earthquake/hv75043997-m2-1-earthquake-66-km-se-of-holualoa-hawaii-united-states, data from USGS.
JSON: /api/v1/events/hv75043997. SeismoAtlas is not an official warning service.