QuakeIndex

Earthquake · reviewed by a seismologist

M 4.2ml

Earthquake near Kodiak, AK

No earthquake was likely felt in Kodiak in the 24 hours to 9:53 am AKST (18:53 UTC). The last one was M 5.5, 133 km (83 mi) NNW, at 10:34 am AKDT on 6 October 2026, estimated intensity III (weak) in town; 342 felt reports to USGS. Every earthquake near Kodiak

This page: a magnitude 4.2 earthquake was recorded 42 km (26 mi) south of Kodiak, AK, at 6:36 pm AKDT on 28 April 2026 (02:36 UTC), 48 km deep. 18 people have reported feeling it to USGS.

USGS: 24 km SSW of Chiniak, Alaska

6:36 pm AKDT, Apr 28, 2026 · · 48 km deep · released about 30 tons of TNT

Every earthquake near Kodiak Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kodiak Island Borough 95 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
6:36 pm AKDT on 28 April 2026 ()
Where
42 km (26 mi) south of Kodiak, AK · earthquakes near Kodiak
Magnitude
M 4.2 (ml)
Depth
48 km below the surface
Felt
18 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Kodiak Island Borough, 95 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 125 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

At this magnitude and depth, people at rest would likely notice it out to about 102 km (63 mi) from the epicentre. In Kodiak, 42 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Likely felt in: Kodiak Station 41 km, intensity II · Kodiak 42 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 30 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 5,600× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 250× the energy of this one
  3. Magna, Utah 2020 M 5.7 180× the energy of this one
  4. This earthquake M 4.2 about 30 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 63× more

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

For this area

The largest earthquake within 50 km (31 mi) since our catalogue begins in 2016. The previous largest was M 4.1 on 2017-03-05.

Before 2016, the USGS record lists 7 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.2 53 km ESE of Old Harbor, Alaska · 41 km S of this epicentre
  2. 5.9 25 km E of Old Harbor, Alaska · 39 km SW of this epicentre
  3. 5.6 39 km ESE of Chiniak, Alaska · 45 km E of this epicentre
  4. 5.6 45 km SSE of Chiniak, Alaska · 36 km ESE of this epicentre
  5. 5.6 13 km S of Chiniak, Alaska · 14 km NE of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 57.4090, -152.4320. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kodiak Island Borough, AK 95 km (59 mi) WNW earthquakes near Kodiak Island Borough

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

12 earthquakes have been recorded within 50 km since this one.

  1. 2.4 13 km S of Chiniak, Alaska
  2. 2.4 11 km ESE of Womens Bay, Alaska
  3. 2.3 30 km SSW of Chiniak, Alaska
  4. 2.4 25 km S of Womens Bay, Alaska
  5. 2.4 12 km ESE of Kodiak, Alaska
  6. 1.8 14 km SSE of Womens Bay, Alaska
  7. 2.1 17 km SSE of Chiniak, Alaska
  8. 3.0 8 km NNE of Kodiak Station, Alaska
  9. 2.4 35 km ESE of Old Harbor, Alaska
  10. 1.8 37 km E of Old Harbor, Alaska
  11. 2.7 22 km S of Chiniak, Alaska
  12. 2.4 17 km SW of Chiniak, Alaska

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.