QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

80 km WSW of Mosquito Lake, Alaska

· 5.0 km deep · released about 950 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Haines Borough 106 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
5.0 km below the surface
Felt
no reports yet
Nearest
Haines Borough, 106 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 631 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 59.2635, -137.4048. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Haines Borough, AK 106 km (66 mi) W of here earthquakes near Haines Borough
Skagway Municipality, AK 121 km (75 mi) WSW of here earthquakes near Skagway Municipality
Hoonah-Angoon Census Area, AK 130 km (81 mi) NW of here earthquakes near Hoonah-Angoon Census Area

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

Aftershocks so far

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

  1. 2.4 68 km SW of Covenant Life, Alaska
  2. 3.3 78 km SW of Covenant Life, Alaska
  3. 2.6 78 km WSW of Covenant Life, Alaska
  4. 2.2 111 km WSW of Covenant Life, Alaska
  5. 2.7 114 km WSW of Covenant Life, Alaska
  6. 2.6 109 km WSW of Covenant Life, Alaska
  7. 2.5 66 km WSW of Mosquito Lake, Alaska
  8. 1.9 68 km WSW of Covenant Life, Alaska
  9. 1.8 81 km SW of Covenant Life, Alaska
  10. 1.6 70 km SW of Covenant Life, Alaska
  11. 1.6 60 km WSW of Covenant Life, Alaska
  12. 1.9 99 km NW of Elfin Cove, Alaska
  13. 3.2 68 km WSW of Covenant Life, Alaska
  14. 2.0 53 km W of Mosquito Lake, Alaska
  15. 2.3 96 km NW of Elfin Cove, 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 5.0 on 2019-09-01 — it released about 1,000 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.