QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

Earthquake near Kodiak, AK

No earthquake was likely felt in Kodiak in the 24 hours to 9:54 am AKST (18:54 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 2.1 earthquake was recorded 38 km (24 mi) northwest of Kodiak, AK, at 10:11 pm AKST on 30 December 2019 (07:11 UTC), 44 km deep.

USGS: 4 km SSE of Aleneva, Alaska

10:11 pm AKST, Dec 30, 2019 · · 44 km deep · released about 43 lb of TNT

Every earthquake near Kodiak Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kodiak Island Borough 71 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
10:11 pm AKST on 30 December 2019 ()
Where
38 km (24 mi) northwest of Kodiak, AK · earthquakes near Kodiak
Magnitude
M 2.1 (ml)
Depth
44 km below the surface
Felt
no reports yet
Nearest
Kodiak Island Borough, 71 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2501 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Kodiak, 38 km away, the estimate is intensity I (not felt). 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.

How big was it?

This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 lb of TNT

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 4.9 on 2019-01-02 — about 16,000 times the energy of this one.

Before 2016, the USGS record lists 9 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.8 17 km N of Ouzinkie, Alaska · 20 km ENE of this epicentre
  2. 6.2 27 km NNE of Ouzinkie, Alaska · 37 km ENE of this epicentre
  3. 6.2 37 km NNW of Aleneva, Alaska · 42 km NNW of this epicentre
  4. 5.8 9 km ENE of Port Lions, Alaska · 16 km SSE of this epicentre
  5. 5.7 40 km WNW of Aleneva, Alaska · 44 km WNW 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 58.0206, -152.8786. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kodiak Island Borough, AK 71 km (44 mi) WSW earthquakes near Kodiak Island Borough

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

Aftershocks so far

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

  1. 1.9 11 km NNW of Kodiak Station, Alaska
  2. 1.6 10 km WSW of Aleneva, Alaska
  3. 2.3 28 km NNE of Aleneva, Alaska
  4. 2.2 31 km N of Aleneva, Alaska
  5. 1.8 37 km N of Aleneva, Alaska
  6. 1.6 29 km NNW of Aleneva, Alaska
  7. 2.2 15 km WNW of Aleneva, Alaska
  8. 1.9 33 km SW of Port Lions, Alaska
  9. 1.7 11 km SW of Aleneva, Alaska
  10. 1.9 22 km W of Port Lions, Alaska
  11. 2.4 41 km N of Aleneva, Alaska
  12. 1.8 11 km NNE of Port Lions, Alaska
  13. 1.7 11 km SSW of Womens Bay, Alaska
  14. 2.1 24 km WNW of Aleneva, Alaska
  15. 1.6 14 km SW of Port Lions, 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.