QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0ml

Earthquake near Anchorage, AK

No earthquake was likely felt in Anchorage in the 24 hours to 12:43 pm AKST (21:43 UTC). The last one was M 3.5, 39 km (24 mi) SSW, at 4:48 pm AKDT on 27 October 2026, estimated intensity II (weak) in town; 98 felt reports to USGS. Every earthquake near Anchorage

This page: a magnitude 2.0 earthquake was recorded 26 km (16 mi) north-northeast of Anchorage, AK, at 8:59 pm AKDT on 7 August 2019 (04:59 UTC), 51 km deep.

USGS: 2 km SSW of Knik, Alaska

26 km (16 mi) NNE of Anchorage, AK

8:59 pm AKDT, Aug 7, 2019 · · 51 km deep · released about 30 lb of TNT

Every earthquake near Anchorage Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Anchorage Municipality 39 kmMatanuska-Susitna Borough 93 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
8:59 pm AKDT on 7 August 2019 ()
Where
26 km (16 mi) north-northeast of Anchorage, AK · earthquakes near Anchorage
Magnitude
M 2.0 (ml)
Depth
51 km below the surface
Felt
no reports yet
Nearest
Anchorage Municipality, 39 km SE
Nearest mapped fault
Castle Mountain fault, 20 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2625 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 Anchorage, 26 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.

Earthquakes near other towns within 30 km: Knik-Fairview, Big Lake, Eagle River, Elmendorf Air Force Base, Houston, Meadow Lakes.

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 7.1 on 2018-11-30 — about 45,000,000 times the energy of this one.

Before 2016, the USGS record lists 18 earthquakes of M5 or more within 50 km; the five largest:

  1. 5.6 11 km NW of Big Lake, Alaska · 25 km NW of this epicentre
  2. 5.6 5 km N of Susitna, Alaska · 44 km WNW of this epicentre
  3. 5.5 2 km ENE of Eagle River, Alaska · 17 km SE of this epicentre
  4. 5.5 9 km E of Susitna, Alaska · 33 km WNW of this epicentre
  5. 5.3 12 km S of Susitna, Alaska · 41 km W 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 61.4405, -149.7481. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Anchorage Municipality, AK 39 km (24 mi) SE earthquakes near Anchorage Municipality
Matanuska-Susitna Borough, AK 93 km (58 mi) N earthquakes near Matanuska-Susitna Borough

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

Aftershocks so far

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

  1. 1.7 4 km N of Willow, Alaska
  2. 1.8 15 km N of Meadow Lakes, Alaska
  3. 1.6 6 km SSE of Point MacKenzie, Alaska
  4. 1.5 5 km WNW of Willow, Alaska
  5. 1.5 8 km NW of Big Lake, Alaska
  6. 1.8 8 km SSE of Big Lake, Alaska
  7. 1.6 5 km WNW of Point MacKenzie, Alaska
  8. 2.9 8 km NW of Willow, Alaska
  9. 1.7 4 km ESE of Big Lake, Alaska
  10. 1.9 4 km W of Point MacKenzie, Alaska
  11. 2.3 3 km SE of Big Lake, Alaska
  12. 1.5 5 km S of Houston, Alaska
  13. 1.9 5 km WNW of Point MacKenzie, AK
  14. 2.9 6 km NW of Point MacKenzie, Alaska
  15. 1.8 7 km NNE of Meadow Lakes, 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.