QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

19 km WSW of Salamatof, Alaska

· 68 km deep · released about 5.4 lb of TNT

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10 km30 km60 km120 km N Kenai Peninsula Borough 42 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 1.5 (ml)
Depth
68 km below the surface
Felt
no reports yet
Nearest
Kenai Peninsula Borough, 42 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1151 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 60.5252, -151.6178. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kenai Peninsula Borough, AK 42 km (26 mi) ENE of here earthquakes near Kenai Peninsula Borough

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

Aftershocks so far

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

  1. 2.1 19 km W of Clam Gulch, Alaska
  2. 1.5 16 km N of Ninilchik, Alaska
  3. 1.5 41 km WNW of Salamatof, Alaska
  4. 1.5 26 km NW of Ninilchik, Alaska
  5. 1.8 36 km NW of Ninilchik, Alaska
  6. 1.8 38 km WNW of Clam Gulch, Alaska
  7. 1.9 48 km WNW of Nikiski, Alaska
  8. 1.5 18 km WNW of Clam Gulch, Alaska
  9. 1.7 20 km N of Nikiski, Alaska
  10. 2.1 12 km WSW of Salamatof, Alaska
  11. 1.9 35 km W of Salamatof, Alaska
  12. 1.6 39 km NW of Ninilchik, Alaska
  13. 1.8 47 km WSW of Salamatof, Alaska
  14. 1.8 12 km NW of Kalifornsky, Alaska
  15. 1.9 36 km WSW of Salamatof, 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.