QuakeIndex

Earthquake · reviewed by a seismologist

M 5.1mww

50 km SSW of Covenant Life, Alaska

· 7.2 km deep · released about 670 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Haines Borough 51 kmHoonah-Angoon Census Area 76 kmSkagway Municipality 88 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 5.1 (mww)
Depth
7.2 km below the surface
Felt
283 reports · strongest reported intensity IV
Measured shaking
intensity VI (ShakeMap)
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Haines Borough, 51 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 998 days ago

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre. 283 people have reported feeling it to USGS.

How big was it?

This earthquake released about 670 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11× the energy of this one
  3. Magna, Utah 2020 M 5.7 7.9× the energy of this one
  4. This earthquake M 5.1 about 670 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 1,400× more

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 59.0183, -136.4596. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Haines Borough, AK 51 km (32 mi) W of here earthquakes near Haines Borough
Hoonah-Angoon Census Area, AK 76 km (47 mi) NNW of here earthquakes near Hoonah-Angoon Census Area
Skagway Municipality, AK 88 km (54 mi) SW of here earthquakes near Skagway Municipality

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. 2.0 49 km SSW of Covenant Life, Alaska
  2. 1.6 51 km SSW of Covenant Life, Alaska
  3. 1.5 54 km SSW of Covenant Life, Alaska
  4. 3.1 Southeastern Alaska
  5. 2.9 49 km SSW of Covenant Life, Alaska
  6. 2.7 50 km SSW of Covenant Life, Alaska
  7. 1.5 52 km SSW of Covenant Life, Alaska
  8. 2.2 54 km SSW of Covenant Life, Alaska
  9. 2.2 48 km SSW of Covenant Life, Alaska
  10. 1.7 51 km SSW of Covenant Life, Alaska
  11. 1.7 53 km SSW of Covenant Life, Alaska
  12. 1.6 51 km SSW of Covenant Life, Alaska
  13. 2.0 54 km SSW of Covenant Life, Alaska
  14. 2.2 54 km SW of Covenant Life, Alaska
  15. 1.6 51 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 5.0 on 2019-09-01.

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

On USGS

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