QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

4 km ENE of South Naknek, Alaska

· 20 km deep · released about 7.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Bristol Bay Borough 4 kmLake and Peninsula Borough 75 kmDillingham Census Area 119 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 1.6 (ml)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Bristol Bay Borough, 4 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1202 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 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 58.7272, -156.9223. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Bristol Bay Borough, AK 4 km (3 mi) E of here earthquakes near Bristol Bay Borough
Lake and Peninsula Borough, AK 75 km (47 mi) NNW of here earthquakes near Lake and Peninsula Borough
Dillingham Census Area, AK 119 km (74 mi) SE of here earthquakes near Dillingham Census Area

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

Aftershocks so far

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

  1. 1.6 20 km W of Naknek, Alaska
  2. 2.3 23 km SSE of King Salmon, Alaska
  3. 1.6 28 km S of King Salmon, Alaska
  4. 1.9 10 km SSE of King Salmon, Alaska
  5. 2.1 8 km SSE of King Salmon, Alaska
  6. 2.2 28 km S of South Naknek, Alaska
  7. 1.7 34 km SSE of King Salmon, Alaska
  8. 1.8 12 km E of King Salmon, Alaska
  9. 2.2 28 km SE of Levelock, Alaska
  10. 2.2 27 km SSW of King Salmon, Alaska
  11. 1.9 23 km S of King Salmon, Alaska
  12. 1.6 24 km S of King Salmon, Alaska
  13. 3.2 10 km SE of King Salmon, Alaska
  14. 3.5 22 km S of King Salmon, Alaska
  15. 1.5 31 km SSE of King Salmon, 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 710,000 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.