QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Earthquake near Anchor Point, AK

No earthquake was likely felt in Anchor Point in the 24 hours to 1:55 pm AKST (22:55 UTC). The last one was M 4.3, 69 km (43 mi) NE, at 2:30 am AKST on 1 November 2026, estimated intensity II (weak) in town; 115 felt reports to USGS. Every earthquake near Anchor Point

This page: a magnitude 1.7 earthquake was recorded 47 km (29 mi) west of Anchor Point, AK, at 9:51 am AKDT on 4 October 2022 (17:51 UTC), 83 km deep. 1 person has reported feeling it to USGS.

USGS: 47 km W of Anchor Point, Alaska

9:51 am AKDT, Oct 4, 2022 · · 83 km deep · released about 11 lb of TNT

Every earthquake near Anchor Point Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kenai Peninsula Borough 61 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
9:51 am AKDT on 4 October 2022 ()
Where
47 km (29 mi) west of Anchor Point, AK · earthquakes near Anchor Point
Magnitude
M 1.7 (ml)
Depth
83 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Kenai Peninsula Borough, 61 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1480 days ago

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

At this magnitude and depth it was probably too small to be felt, even directly above it. In Anchor Point, 47 km away, the estimate is intensity I (not felt). 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 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.

For this area

The largest earthquake within 50 km since 2016 was M 5.6 on 2017-03-02 — about 710,000 times the energy of this one.

Before 2016, the USGS record lists 26 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.4 25 km NW of Nanwalek, Alaska · 44 km SSE of this epicentre
  2. 6.4 52 km ENE of Pedro Bay, Alaska · 30 km W of this epicentre
  3. 6.2 16 km WNW of Happy Valley, Alaska · 40 km ENE of this epicentre
  4. 6.2 70 km E of Port Alsworth, Alaska · 40 km NNW of this epicentre
  5. 6.0 53 km W of Anchor Point, Alaska · 8 km SW 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 59.8473, -152.6591. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kenai Peninsula Borough, AK 61 km (38 mi) NNE earthquakes near Kenai Peninsula Borough

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. 1.9 48 km WNW of Happy Valley, Alaska
  2. 1.6 30 km NW of Nanwalek, Alaska
  3. 3.1 57 km ESE of Pedro Bay, Alaska
  4. 1.6 49 km WNW of Nanwalek, Alaska
  5. 2.0 63 km ENE of Pedro Bay, Alaska
  6. 1.7 47 km W of Anchor Point, Alaska
  7. 1.8 30 km W of Anchor Point, Alaska
  8. 1.8 70 km ENE of Pedro Bay, Alaska
  9. 3.6 65 km E of Port Alsworth, Alaska
  10. 1.7 53 km W of Anchor Point, Alaska
  11. 2.9 56 km WNW of Nanwalek, Alaska
  12. 2.2 72 km ENE of Pedro Bay, Alaska
  13. 1.7 60 km E of Pedro Bay, Alaska
  14. 1.8 58 km W of Happy Valley, Alaska
  15. 1.9 64 km ENE of Pedro 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.