QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

84 km WSW of Covenant Life, Alaska

· 1.8 km deep · released about 15 lb of TNT

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10 km30 km60 km120 km N Haines Borough 107 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 1.8 (ml)
Depth
1.8 km below the surface
Felt
no reports yet
Nearest
Haines Borough, 107 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1367 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 59.1955, -137.4361. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Haines Borough, AK 107 km (66 mi) W of here earthquakes near Haines Borough
Hoonah-Angoon Census Area, AK 125 km (78 mi) NW of here earthquakes near Hoonah-Angoon Census Area
Skagway Municipality, AK 126 km (78 mi) WSW of here earthquakes near Skagway Municipality

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

Aftershocks so far

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

  1. 1.9 116 km ESE of Yakutat, Alaska
  2. 1.9 95 km NW of Elfin Cove, Alaska
  3. 1.9 101 km NW of Elfin Cove, Alaska
  4. 2.1 117 km ESE of Yakutat, Alaska
  5. 2.2 59 km WSW of Covenant Life, Alaska
  6. 2.6 119 km WSW of Covenant Life, Alaska
  7. 2.1 116 km WSW of Covenant Life, Alaska
  8. 2.4 113 km ESE of Yakutat, Alaska
  9. 1.9 British Columbia, Canada
  10. 3.3 119 km ESE of Yakutat, Alaska
  11. 1.9 British Columbia, Canada
  12. 3.7 118 km ESE of Yakutat, Alaska
  13. 1.6 77 km W of Mosquito Lake, Alaska
  14. 2.0 82 km SW of Covenant Life, Alaska
  15. 1.6 British Columbia, Canada

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 63,000 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.