QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

20 km SW of Point Possession, Alaska

· 17 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kenai Peninsula Borough 89 kmAnchorage Municipality 99 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 1.9 (ml)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Kenai Peninsula Borough, 89 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 226 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 60.7850, -150.9320. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kenai Peninsula Borough, AK 89 km (55 mi) ENE of here earthquakes near Kenai Peninsula Borough
Anchorage Municipality, AK 99 km (61 mi) WSW of here earthquakes near Anchorage Municipality

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

Aftershocks so far

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

  1. 1.8 13 km SE of Point Possession, Alaska
  2. 1.8 11 km SSE of Tyonek, Alaska
  3. 1.8 16 km S of Point Possession, Alaska
  4. 2.0 9 km S of Funny River, Alaska
  5. 1.8 16 km SSW of Point Possession, Alaska
  6. 1.5 21 km SW of Tyonek, Alaska
  7. 1.6 20 km WSW of Point Possession, Alaska
  8. 1.8 7 km NNW of Sterling, Alaska
  9. 1.8 13 km SE of Tyonek, Alaska
  10. 2.4 10 km SE of Tyonek, Alaska
  11. 1.7 3 km E of Ridgeway, Alaska
  12. 1.6 17 km S of Tyonek, Alaska
  13. 1.9 17 km S of Point Possession, Alaska
  14. 1.6 10 km WSW of Kenai, Alaska
  15. 2.3 10 km WSW of Point Possession, 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 4.8 on 2022-07-12 — 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.