QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

21 km SW of Chenega, Alaska

· 26 km deep · released about 950 lb of TNT

Felt it? Tell USGS Check my area
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 3.0 (ml)
Depth
26 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Chugach Census Area, 130 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2280 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 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.

Where

Epicentre 59.9205, -148.2671. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Chugach Census Area, AK 130 km (81 mi) WSW of here earthquakes near Chugach Census Area

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

Aftershocks so far

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

  1. 1.8 11 km NE of Chenega, Alaska
  2. 1.6 23 km NNE of Chenega, Alaska
  3. 2.0 29 km WSW of Chenega, Alaska
  4. 1.8 39 km ESE of Lowell Point, Alaska
  5. 1.6 13 km ENE of Chenega, Alaska
  6. 2.0 52 km SW of Chenega, Alaska
  7. 2.0 20 km S of Chenega, Alaska
  8. 1.5 35 km WSW of Chenega, Alaska
  9. 2.5 30 km WSW of Chenega, Alaska
  10. 1.6 7.1 km WNW of Chenega, AK
  11. 2.1 27 km WSW of Chenega, Alaska
  12. 1.9 6 km E of Chenega, Alaska
  13. 1.6 20 km NNE of Chenega, Alaska
  14. 1.6 25 km S of Chenega, Alaska
  15. 1.7 23 km SSW of Chenega, 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.