QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2ml

182 km W of Adak, Alaska

Yes. A magnitude 3.2 earthquake was recorded 182 km W of Adak, Alaska at 06:00 UTC on 2024-06-11, 161 km deep.

· 161 km deep · released about 1,900 lb of TNT

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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 3.2 (ml)
Depth
161 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 814 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 it was probably too small to be felt, even directly above it. 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 1,900 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 180,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,600× the energy of this one
  4. This earthquake M 3.2 about 1,900 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 2× 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 5.0 on 2016-11-08 — about 500 times the energy of this one.

Before 2016, the USGS record lists 18 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.6 174 km W of Adak, Alaska · 14 km SSE of this epicentre
  2. 6.4 187 km W of Adak, Alaska · 16 km SSW of this epicentre
  3. 6.2 230 km W of Adak, Alaska · 48 km W of this epicentre
  4. 6.2 146 km WNW of Adak, Alaska · 44 km ENE of this epicentre
  5. 5.9 194 km W of Adak, Alaska · 43 km SSW 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 51.9871, -179.2786. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.4 217 km W of Adak, Alaska
  2. 3.3 206 km W of Adak, Alaska
  3. 2.3 214 km W of Adak, Alaska
  4. 2.9 145 km W of Adak, Alaska
  5. 1.6 144 km W of Adak, Alaska
  6. 2.7 219 km W of Adak, Alaska
  7. 2.6 165 km W of Adak, Alaska
  8. 1.8 161 km WSW of Adak, Alaska
  9. 1.6 150 km W of Adak, Alaska
  10. 2.6 208 km W of Adak, Alaska
  11. 5.0 214 km W of Adak, Alaska
  12. 3.2 154 km W of Adak, Alaska
  13. 1.9 175 km W of Adak, Alaska
  14. 2.0 195 km W of Adak, Alaska
  15. 2.7 185 km W of Adak, 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.