QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

43 km NW of Mosquito Lake, Alaska

· 11 km deep · released about 950 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Skagway Municipality 77 kmHaines Borough 99 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 3.0 (ml)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Skagway Municipality, 77 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1147 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

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 59.8194, -136.6124. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Skagway Municipality, AK 77 km (48 mi) WNW of here earthquakes near Skagway Municipality
Haines Borough, AK 99 km (62 mi) NW of here earthquakes near Haines Borough

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. 3.2 43 km WNW of Mosquito Lake, Alaska
  2. 1.5 50 km NW of Mosquito Lake, Alaska
  3. 1.8 42 km NW of Mosquito Lake, Alaska
  4. 1.7 52 km NW of Mosquito Lake, Alaska
  5. 2.9 43 km NW of Mosquito Lake, Alaska
  6. 1.9 46 km NW of Mosquito Lake, Alaska
  7. 2.2 46 km NW of Mosquito Lake, Alaska
  8. 1.8 46 km NW of Mosquito Lake, Alaska
  9. 1.6 41 km NW of Mosquito Lake, Alaska
  10. 1.7 48 km NW of Mosquito Lake, Alaska
  11. 1.7 53 km NW of Mosquito Lake, Alaska
  12. 1.7 56 km NW of Mosquito Lake, Alaska
  13. 2.2 51 km NW of Mosquito Lake, Alaska
  14. 3.7 46 km NW of Mosquito Lake, Alaska
  15. 1.8 40 km NW of Mosquito Lake, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 6.3 on 2017-05-01 — it released about 89,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.