QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

22 km NNW of Sand Point, Alaska

· 85 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aleutians East Borough 90 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
85 km below the surface
Felt
no reports yet
Nearest
Aleutians East Borough, 90 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2230 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 55.5150, -160.6604. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aleutians East Borough, AK 90 km (56 mi) ENE of here earthquakes near Aleutians East Borough

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

Aftershocks so far

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

  1. 2.6 17 km SSE of Sand Point, Alaska
  2. 1.6 14 km NNW of Sand Point, Alaska
  3. 1.5 42 km WNW of Sand Point, Alaska
  4. 2.0 46 km N of Sand Point, Alaska
  5. 1.8 38 km SE of Nelson Lagoon, Alaska
  6. 1.7 27 km SSE of Sand Point, Alaska
  7. 1.5 23 km E of Sand Point, Alaska
  8. 1.5 16 km SE of Sand Point, Alaska
  9. 1.8 15 km SSE of Sand Point, Alaska
  10. 1.6 13 km NE of Sand Point, Alaska
  11. 1.9 35 km SE of Nelson Lagoon, Alaska
  12. 1.7 18 km NNE of Sand Point, Alaska
  13. 2.6 37 km WSW of Sand Point, Alaska
  14. 2.8 39 km WSW of Sand Point, Alaska
  15. 3.1 19 km S of Nelson Lagoon, 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 4.6 on 2018-05-04 — it released about 22,000 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.