QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

106 km ENE of Kodiak, Alaska

Yes. A magnitude 2.1 earthquake was recorded 106 km ENE of Kodiak, Alaska at 19:24 UTC on 2022-06-07, 10 km deep.

· 10 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N
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
Magnitude
M 2.1 (ml)
Depth
10 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1554 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 14 km (9 mi) from the epicentre. 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 5.0 on 2019-06-07 — about 22,000 times the energy of this one.

Before 2016, the USGS record lists 13 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.5 78 km ENE of Ouzinkie, Alaska · 35 km WNW of this epicentre
  2. 5.8 84 km ENE of Kodiak, Alaska · 22 km WSW of this epicentre
  3. 5.8 124 km ENE of Ouzinkie, Alaska · 27 km NNE of this epicentre
  4. 5.6 82 km ENE of Kodiak, Alaska · 25 km WSW of this epicentre
  5. 5.6 108 km ENE of Chiniak, Alaska · 14 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 58.1272, -150.7160. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.0 95 km ENE of Ouzinkie, Alaska
  2. 1.6 126 km ENE of Ouzinkie, Alaska
  3. 2.7 114 km SSE of Port Graham, Alaska
  4. 2.6 101 km NE of Ouzinkie, Alaska
  5. 2.3 101 km ENE of Ouzinkie, Alaska
  6. 1.9 102 km ENE of Ouzinkie, Alaska
  7. 2.4 83 km ENE of Ouzinkie, Alaska
  8. 1.9 109 km ENE of Ouzinkie, Alaska
  9. 1.9 Gulf of Alaska
  10. 1.9 110 km ENE of Ouzinkie, Alaska
  11. 2.0 92 km ENE of Ouzinkie, Alaska
  12. 2.1 113 km SSE of Port Graham, Alaska
  13. 2.0 119 km ENE of Ouzinkie, Alaska
  14. 1.8 93 km ENE of Ouzinkie, Alaska
  15. 2.4 121 km ENE of Kodiak, 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.