QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

38 km NNW of Gustavus, Alaska

· 11 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hoonah-Angoon Census Area 37 kmHaines Borough 49 kmSkagway Municipality 101 kmJuneau City and Borough 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 1.7 (ml)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Hoonah-Angoon Census Area, 37 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2449 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 58.7269, -136.0203. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hoonah-Angoon Census Area, AK 37 km (23 mi) NNW of here earthquakes near Hoonah-Angoon Census Area
Haines Borough, AK 49 km (30 mi) SSW of here earthquakes near Haines Borough
Skagway Municipality, AK 101 km (62 mi) SSW of here earthquakes near Skagway Municipality
Juneau City and Borough, AK 114 km (71 mi) WNW 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

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

  1. 2.2 43 km SW of Mud Bay, Alaska
  2. 1.7 57 km NNW of Gustavus, Alaska
  3. 2.1 49 km SSW of Covenant Life, Alaska
  4. 1.5 61 km NW of Gustavus, Alaska
  5. 1.8 54 km SSW of Covenant Life, Alaska
  6. 1.6 33 km WSW of Haines, Alaska
  7. 1.6 37 km WSW of Mud Bay, Alaska
  8. 2.0 37 km SSW of Covenant Life, Alaska
  9. 1.5 46 km SSW of Covenant Life, Alaska
  10. 1.5 38 km S of Covenant Life, Alaska
  11. 1.5 38 km WSW of Haines, Alaska
  12. 1.7 36 km SSW of Klukwan, Alaska
  13. 1.9 32 km SSW of Covenant Life, Alaska
  14. 3.1 31 km SSW of Covenant Life, Alaska
  15. 2.0 35 km SSW 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 4.0 on 2017-08-18 — 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.