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SeismoAtlas

M2.8 earthquake – Denali National Park, Alaska

A magnitude 2.8 earthquake struck in the Denali National Park, Alaska region at 15:22 local time (23:22 UTC) on 19 Oct 2026, at a depth of 118 km, according to USGS.

revised from M2.5

Data: USGS · updated 2026-10-23 16:31 UTC · reviewed

Magnitude
2.8micro
local magnitude (Richter) (ml)
revised from 2.5
Depth
117.7 km
Status
Reviewed
Origin time
2026-10-19 23:22:38 UTC
Local: 19 Oct 2026, 15:22:38 (America/Anchorage)
Epicentre
63.074° N, 150.953° 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
AnchorageAlaska, United States · pop. 289,600213 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 · AK, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · AKheadlineAlaska Earthquake Center via U.S. Geological Survey2.8 mlwas 2.6117.7 km63.07° N, 150.95° W–Reviewed · 3 revisions

How big was it?

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

It released roughly the energy of 239 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 118 km this was a intermediate-depth earthquake, which spreads shaking over a wider area but less intensely.

M2.8 releases about 32× the energy of M1.8, and its waves are about 10× taller on a seismogram. Energy: 239 kg of TNT vs 8 kg of TNT.

Each square is the energy of one M1.8. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

42 later earthquakes within 30 km; the largest was M3.5 3 days ago. 13 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.8

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
24.151.7117
24.872.1124
45.132.5115
84.491.892
101.682.8123
102.462.4106
113.872.1127
135.342.1132
143.681.55
149.301.8120
154.211.9134
158.591.9114
167.501.79
173.981.6107
174.552.04
223.502.396
230.141.75
230.852.2101
260.872.7128
269.352.2117
275.062.12
308.401.93
323.752.086
338.572.1124
346.272.3133
346.272.3135
353.271.9119
385.472.099
394.421.9121
400.832.192
439.752.6134
452.522.0139
456.831.82
464.492.1120
464.822.1122
467.762.692
472.451.7107
486.762.2104
487.011.45
489.103.5112
518.682.61
536.552.3122
  1. 3.5Petersville, Alaska11-09 08:28
  2. 2.8Denali National Park, Alaska10-24 05:03
  3. 2.7Petersville, Alaska10-30 20:14
  4. 2.6Denali National Park, Alaska11-07 07:07
  5. 2.6Petersville, Alaska11-08 11:08
  6. 2.6Denali National Park, Alaska11-10 14:03
  7. 2.5Petersville, Alaska10-21 20:30
  8. 2.4Petersville, Alaska10-24 05:50
  9. 2.3Petersville, Alaska10-29 06:52
  10. 2.3Denali National Park, Alaska11-03 09:38
  11. 2.3Denali National Park, Alaska11-03 09:38
  12. 2.3Denali National Park, Alaska11-11 07:55
  13. 2.2Petersville, Alaska10-29 14:13
  14. 2.2Denali National Park, Alaska10-31 04:43
  15. 2.2Petersville, Alaska11-09 06:08
  16. 2.1Denali National Park, Alaska10-21 00:14
  17. 2.1Petersville, Alaska10-24 17:14
  18. 2.1Denali National Park, Alaska10-25 14:43
  19. 2.1Denali National Park, Alaska10-31 10:26
  20. 2.1Petersville, Alaska11-03 01:56
  21. 2.1Petersville, Alaska11-05 16:12
  22. 2.1Denali National Park, Alaska11-08 07:52
  23. 2.1Denali National Park, Alaska11-08 08:11
  24. 2.0Denali National Park, Alaska10-27 05:55
  25. 2.0Petersville, Alaska11-02 11:07

Did you feel it?

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

Reports close 14 days after an earthquake.

Reports on SeismoAtlas

No reports yet.

Event id aka2026uthdkl. First recorded here 19 Oct 2026, 23:25:12 UTC. Solutions: USGS · AK (usgs:aka2026uthdkl). Cite as: SeismoAtlas, “M2.8 earthquake – Denali National Park, Alaska”, https://seismoatlas.com/earthquake/aka2026uthdkl-m2-8-earthquake-denali-national-park-alaska, data from USGS.

JSON: /api/v1/events/aka2026uthdkl. SeismoAtlas is not an official warning service.