QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

Earthquake near Sand Point, AK

No earthquake was likely felt in Sand Point in the 24 hours to 9:38 am AKST (18:38 UTC). The last one was M 4.2, 99 km (61 mi) SE, at 10:44 pm AKDT on 22 October 2026, estimated intensity II (weak) in town. Every earthquake near Sand Point

This page: a magnitude 1.9 earthquake was recorded 44 km (27 mi) east of Sand Point, AK, at 4:24 am AKST on 11 February 2019 (13:24 UTC), 53 km deep.

USGS: Alaska Peninsula

4:24 am AKST, Feb 11, 2019 · · 53 km deep · released about 21 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
4:24 am AKST on 11 February 2019 ()
Where
44 km (27 mi) east of Sand Point, AK · earthquakes near Sand Point
Magnitude
M 1.9 (ml)
Depth
53 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2002 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 Sand Point, 44 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 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 55.3875, -159.8095. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.7 29 km S of Ivanof Bay, Alaska
  2. 2.6 71 km ESE of Sand Point, Alaska
  3. 4.7 70 km ESE of Sand Point, Alaska
  4. 1.8 43 km E of Sand Point, Alaska
  5. 2.1 Alaska Peninsula
  6. 2.4 35 km S of Ivanof Bay, Alaska
  7. 1.8 42 km S of Ivanof Bay, Alaska
  8. 1.6 21 km ESE of Sand Point, Alaska
  9. 2.0 45 km SSW of Ivanof Bay, Alaska
  10. 2.8 35 km ENE of Sand Point, Alaska
  11. 1.9 14 km SSW of Ivanof Bay, Alaska
  12. 3.2 46 km E of Sand Point, Alaska
  13. 2.6 67 km S of Ivanof Bay, Alaska
  14. 1.8 34 km SE of Sand Point, Alaska
  15. 2.6 54 km S of Ivanof 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

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