QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

Earthquake near Kodiak, AK

No earthquake was likely felt in Kodiak in the 24 hours to 6:03 pm AKST (03:03 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 3.3 earthquake was recorded 24 km (15 mi) south of Kodiak, AK, at 6:42 am AKST on 15 January 2020 (15:42 UTC), 45 km deep. 4 people have reported feeling it to USGS.

USGS: 4 km SW of Chiniak, Alaska

6:42 am AKST, Jan 15, 2020 · · 45 km deep · released about 1.3 tons of TNT

Every earthquake near Kodiak Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kodiak Island Borough 96 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
6:42 am AKST on 15 January 2020 ()
Where
24 km (15 mi) south of Kodiak, AK · earthquakes near Kodiak
Magnitude
M 3.3 (ml)
Depth
45 km below the surface
Felt
4 reports · strongest reported intensity III
Nearest
Kodiak Island Borough, 96 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2410 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 26 km (16 mi) from the epicentre. In Kodiak, 24 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 24 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,000× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.8× 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 since 2016 was M 4.1 on 2017-03-05 — about 16 times the energy of this one.

Before 2016, the USGS record lists 8 earthquakes of M5 or more within 50 km; the five largest:

  1. 5.8 9 km ENE of Port Lions, Alaska · 43 km NNW of this epicentre
  2. 5.6 39 km ESE of Chiniak, Alaska · 41 km ESE of this epicentre
  3. 5.6 47 km ESE of Chiniak, Alaska · 49 km ESE of this epicentre
  4. 5.6 45 km SSE of Chiniak, Alaska · 44 km SE of this epicentre
  5. 5.6 13 km S of Chiniak, Alaska · 10 km SSE 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 57.5747, -152.3290. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kodiak Island Borough, AK 96 km (59 mi) W earthquakes near Kodiak Island Borough

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

Aftershocks so far

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

  1. 2.9 9 km SSE of Kodiak, Alaska
  2. 2.0 29 km ENE of Old Harbor, Alaska
  3. 1.9 24 km SW of Chiniak, Alaska
  4. 1.6 12 km SW of Womens Bay, Alaska
  5. 2.0 40 km S of Chiniak, Alaska
  6. 2.3 21 km E of Kodiak, Alaska
  7. 3.0 7 km NNE of Chiniak, Alaska
  8. 1.7 34 km E of Old Harbor, Alaska
  9. 1.8 27 km SW of Chiniak, Alaska
  10. 2.4 41 km E of Old Harbor, Alaska
  11. 1.9 3 km ESE of Womens Bay, Alaska
  12. 1.7 14 km SW of Chiniak, Alaska
  13. 1.9 19 km SSE of Womens Bay, Alaska
  14. 1.5 33 km SSW of Womens Bay, Alaska
  15. 1.8 42 km E of Old Harbor, 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.