QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0ml

50 km ESE of Mud Bay, Alaska

Yes. A magnitude 2.0 earthquake was recorded 50 km ESE of Mud Bay, Alaska, at 4:43 pm AKDT on 10 October 2022 (00:43 UTC), 1.3 km deep.

· 1.3 km deep · released about 30 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Haines Borough 61 kmSkagway Municipality 73 kmJuneau City and Borough 78 kmHoonah-Angoon Census Area 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 2.0 (ml)
Depth
1.3 km below the surface
Felt
no reports yet
Nearest
Haines Borough, 61 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1470 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 16 km (10 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 30 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 350,000× the energy of this one
  3. Around the size people start to feel M 3.0 32× the energy of this one
  4. This earthquake M 2.0 about 30 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.2 on 2022-10-10 — about 2,000 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.0 23 km SSE of Mud Bay, Alaska · 43 km WSW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 59.0508, -134.5140. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Haines Borough, AK 61 km (38 mi) W earthquakes near Haines Borough
Skagway Municipality, AK 73 km (46 mi) NW earthquakes near Skagway Municipality
Juneau City and Borough, AK 78 km (48 mi) SSE earthquakes near Juneau City and Borough
Hoonah-Angoon Census Area, AK 107 km (66 mi) SW earthquakes near Hoonah-Angoon Census Area

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

Aftershocks so far

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

  1. 2.8 60 km N of Juneau, Alaska
  2. 3.5 26 km E of Mud Bay, Alaska
  3. 3.0 45 km SE of Mud Bay, Alaska
  4. 1.8 45 km SE of Mud Bay, Alaska
  5. 2.4 56 km N of Juneau, Alaska
  6. 2.6 56 km N of Juneau, Alaska
  7. 2.3 58 km N of Juneau, Alaska
  8. 2.8 58 km N of Juneau, Alaska
  9. 2.3 34 km E of Skagway, Alaska
  10. 2.0 70 km ESE of Mud Bay, Alaska
  11. 2.1 64 km ESE of Mud Bay, Alaska
  12. 1.8 66 km ESE of Mud Bay, Alaska
  13. 2.1 51 km N of Juneau, Alaska
  14. 3.3 48 km ESE of Mud Bay, Alaska
  15. 1.5 40 km ESE of Mud Bay, 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.

On USGS

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