QuakeIndex

Earthquake · reviewed by a seismologist

M 4.3ml

54 km NE of Chenega, Alaska

· 17 km deep · released about 43 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Chugach Census Area 64 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 4.3 (ml)
Depth
17 km below the surface
Felt
10 reports · strongest reported intensity III
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Chugach Census Area, 64 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1145 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 10 people have reported feeling it to USGS.

How big was it?

This earthquake released about 43 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 4,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 180× the energy of this one
  3. Magna, Utah 2020 M 5.7 130× the energy of this one
  4. This earthquake M 4.3 about 43 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 89× 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 60.4302, -147.3576. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Chugach Census Area, AK 64 km (40 mi) W of here earthquakes near Chugach Census Area
Anchorage Municipality, AK 133 km (83 mi) SE of here earthquakes near Anchorage Municipality

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

Aftershocks so far

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

  1. 1.9 44 km WSW of Tatitlek, Alaska
  2. 1.7 52 km WSW of Tatitlek, Alaska
  3. 1.7 57 km ENE of Chenega, Alaska
  4. 1.5 42 km WSW of Tatitlek, Alaska
  5. 2.7 55 km NE of Chenega, Alaska
  6. 1.5 48 km NNE of Chenega, Alaska
  7. 1.7 48 km ESE of Whittier, Alaska
  8. 1.9 44 km WSW of Tatitlek, Alaska
  9. 1.5 33 km WSW of Tatitlek, Alaska
  10. 1.8 33 km SW of Tatitlek, Alaska
  11. 1.9 33 km NNE of Chenega, Alaska
  12. 1.5 53 km SW of Tatitlek, Alaska
  13. 1.6 45 km NNE of Chenega, Alaska
  14. 1.7 53 km SSW of Tatitlek, Alaska
  15. 1.6 48 km E of Whittier, 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.