QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

5 km ENE of Klukwan, Alaska

· 1.4 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Skagway Municipality 36 kmHaines Borough 41 kmHoonah-Angoon Census Area 114 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 2.1 (ml)
Depth
1.4 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Skagway Municipality, 36 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1338 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 59.4248, -135.9167. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Skagway Municipality, AK 36 km (22 mi) WSW of here earthquakes near Skagway Municipality
Haines Borough, AK 41 km (26 mi) NNW of here earthquakes near Haines Borough
Hoonah-Angoon Census Area, AK 114 km (71 mi) N of here earthquakes near Hoonah-Angoon Census Area
Juneau City and Borough, AK 154 km (96 mi) NW of here earthquakes near Juneau City and Borough

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. 1.5 19 km N of Mosquito Lake, Alaska
  2. 1.6 17 km N of Mosquito Lake, Alaska
  3. 2.1 18 km NNW of Mosquito Lake, Alaska
  4. 1.9 20 km N of Mosquito Lake, Alaska
  5. 1.8 40 km SSW of Covenant Life, Alaska
  6. 1.6 19 km N of Mosquito Lake, Alaska
  7. 2.9 18 km SW of Covenant Life, Alaska
  8. 2.2 21 km N of Mosquito Lake, Alaska
  9. 2.7 16 km N of Mosquito Lake, Alaska
  10. 2.7 21 km SW of Covenant Life, Alaska
  11. 1.9 23 km SW of Covenant Life, Alaska
  12. 1.8 39 km SSW of Covenant Life, Alaska
  13. 1.6 35 km SSW of Covenant Life, Alaska
  14. 1.5 45 km SSW of Covenant Life, Alaska
  15. 2.4 22 km SW of Covenant Life, 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 4.4 on 2021-07-08 — it released about 2,800 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.