QuakeIndex

Earthquake · automatic estimate, may change

M 1.8ml

85 km E of Cordova, Alaska

· 0.0 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Chugach Census Area 111 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
Magnitude
M 1.8 (ml)
Depth
0.0 km below the surface
Felt
no reports yet
Nearest
Chugach Census Area, 111 km W
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 333 days ago

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

How big was it?

This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 60.6900, -144.2168. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Chugach Census Area, AK 111 km (69 mi) ENE 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

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

  1. 2.3 109 km E of Cordova, Alaska
  2. 1.7 112 km E of Cordova, Alaska
  3. 1.6 89 km E of Cordova, Alaska
  4. 1.6 77 km S of Chitina, Alaska
  5. 1.7 105 km SSW of McCarthy, Alaska
  6. 1.6 87 km SSW of McCarthy, Alaska
  7. 1.7 61 km ESE of Cordova, Alaska
  8. 1.8 112 km ESE of Cordova, Alaska
  9. 2.0 106 km E of Cordova, Alaska
  10. 1.6 104 km E of Cordova, Alaska
  11. 1.7 102 km E of Cordova, Alaska
  12. 1.5 92 km SSW of McCarthy, Alaska
  13. 1.8 81 km E of Cordova, Alaska
  14. 1.6 106 km E of Cordova, Alaska
  15. 1.5 95 km E of Cordova, 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.