QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

Earthquake near Homer, AK

No earthquake was likely felt in Homer in the 24 hours to 4:46 pm AKST (01:46 UTC). The last one was M 4.3, 71 km (44 mi) NNE, at 2:30 am AKST on 1 November 2026, estimated intensity II (weak) in town; 115 felt reports to USGS. Every earthquake near Homer

This page: a magnitude 2.9 earthquake was recorded 48 km (30 mi) east of Homer, AK, at 5:09 pm AKDT on 4 November 2017 (01:09 UTC), 38 km deep. 1 person has reported feeling it to USGS.

USGS: 29 km E of Halibut Cove, Alaska

5:09 pm AKDT, Nov 4, 2017 · · 38 km deep · released about 680 lb of TNT

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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
5:09 pm AKDT on 4 November 2017 ()
Where
48 km (30 mi) east of Homer, AK · earthquakes near Homer
Magnitude
M 2.9 (ml)
Depth
38 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Kenai Peninsula Borough, 126 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1191 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Homer, 48 km away, the estimate is intensity II (weak). 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 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists 5 earthquakes of M5 or more within 50 km:

  1. 6.2 43 km ESE of Halibut Cove, Alaska · 21 km SSE of this epicentre
  2. 6.0 6 km SSE of Fox River, Alaska · 28 km NNW of this epicentre
  3. 5.9 13 km N of Fox River, Alaska · 47 km NNW of this epicentre
  4. 5.6 7 km SE of Fritz Creek, Alaska · 31 km WNW of this epicentre
  5. 5.3 16 km SE of Seldovia, Alaska · 50 km WSW 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 59.5735, -150.7103. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kenai Peninsula Borough, AK 126 km (78 mi) NW earthquakes near Kenai Peninsula Borough

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

Aftershocks so far

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

  1. 1.6 23 km SSE of Halibut Cove, Alaska
  2. 2.6 5 km S of Fox River, Alaska
  3. 1.7 20 km ESE of Fox River, Alaska
  4. 2.0 28 km E of Fox River, Alaska
  5. 1.5 20 km ENE of Halibut Cove, Alaska
  6. 2.3 41 km SE of Fox River, Alaska
  7. 1.6 28 km S of Halibut Cove, Alaska
  8. 1.7 Kenai Peninsula, Alaska
  9. 2.1 14 km SE of Fox River, Alaska
  10. 1.9 14 km SE of Fox River, Alaska
  11. 1.6 27 km S of Halibut Cove, Alaska
  12. 1.5 31 km S of Halibut Cove, Alaska
  13. 1.5 26 km S of Halibut Cove, Alaska
  14. 4.3 29 km SE of Seldovia Village, Alaska
  15. 1.7 12 km W of Fox River, 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.