QuakeIndex

Earthquake · reviewed by a seismologist

M 5.2mw

32 km WNW of Nikiski, Alaska

· 81 km deep · released about 950 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kenai Peninsula Borough 59 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 5.2 (mw)
Depth
81 km below the surface
Felt
711 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Kenai Peninsula Borough, 59 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 279 days ago

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre. 711 people have reported feeling it to USGS.

How big was it?

This earthquake released about 950 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 180× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7.9× the energy of this one
  3. Magna, Utah 2020 M 5.7 5.6× the energy of this one
  4. This earthquake M 5.2 about 950 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2,000× 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.

Where

Epicentre 60.8341, -151.8152. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kenai Peninsula Borough, AK 59 km (37 mi) NNE 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

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

  1. 1.6 33 km WNW of Nikiski, Alaska
  2. 1.8 27 km WNW of Nikiski, Alaska
  3. 2.1 65 km W of Tyonek, Alaska
  4. 1.5 15 km WNW of Beluga, Alaska
  5. 1.5 41 km WNW of Salamatof, Alaska
  6. 1.6 29 km WNW of Nikiski, Alaska
  7. 1.9 Southern Alaska
  8. 2.1 21 km NW of Nikiski, Alaska
  9. 1.6 24 km SW of Tyonek, Alaska
  10. 1.5 62 km WNW of Tyonek, Alaska
  11. 1.5 29 km WNW of Salamatof, Alaska
  12. 1.5 11 km SW of Salamatof, Alaska
  13. 1.8 23 km WNW of Beluga, Alaska
  14. 1.6 33 km WNW of Beluga, Alaska
  15. 2.3 16 km WNW of Beluga, 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.