QuakeIndex

Earthquake · reviewed by a seismologist

M 5.1mww

59 km E of Egegik, Alaska

· 13 km deep · released about 670 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake and Peninsula Borough 2 kmBristol Bay Borough 77 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
13 km below the surface
Felt
67 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
Lake and Peninsula Borough, 2 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 180 days ago

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre. 67 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 58.1204, -156.3782. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake and Peninsula Borough, AK 2 km (2 mi) ENE of here earthquakes near Lake and Peninsula Borough
Bristol Bay Borough, AK 77 km (48 mi) SSE of here earthquakes near Bristol Bay Borough

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. 2.1 66 km SE of King Salmon, Alaska
  2. 1.7 55 km ESE of King Salmon, Alaska
  3. 1.5 68 km ENE of Ugashik, Alaska
  4. 2.4 60 km E of Egegik, Alaska
  5. 2.0 33 km SE of King Salmon, Alaska
  6. 1.6 37 km SE of King Salmon, Alaska
  7. 1.5 73 km ESE of Egegik, Alaska
  8. 2.1 73 km ESE of Egegik, Alaska
  9. 2.5 65 km ENE of Ugashik, Alaska
  10. 2.3 67 km ENE of Ugashik, Alaska
  11. 1.5 56 km E of Egegik, Alaska
  12. 2.0 64 km ESE of Egegik, Alaska
  13. 2.0 61 km ESE of Egegik, Alaska
  14. 1.6 24 km S of King Salmon, Alaska
  15. 2.0 79 km ENE of Ugashik, 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 5.5 on 2016-07-23 — it released about 4 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.