QuakeIndex

explosion · reviewed by a seismologist

M 2.5ml

2 km SSE of Princeton, Canada

· -0.2 km deep · released about 190 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Okanogan County 113 kmWhatcom County 117 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 2.5 (ml)
Depth
-0.2 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Okanogan County, 113 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 638 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 190 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 78,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 55,000× the energy of this one
  3. Around the size people start to feel M 3.0 4.9× the energy of this one
  4. This earthquake M 2.5 about 190 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 49.4367, -120.5018. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Okanogan County, WA 113 km (70 mi) NNW of here earthquakes near Okanogan County
Whatcom County, WA 117 km (73 mi) NE of here earthquakes near Whatcom County
Skagit County, WA 142 km (88 mi) NE of here earthquakes near Skagit County

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. 2.0 16 km SSE of Princeton, Canada
  2. 2.3 11 km S of Princeton, Canada
  3. 2.1 8 km SSE of Princeton, Canada
  4. 2.0 9 km SSE of Princeton, Canada
  5. 2.2 12 km SSE of Princeton, Canada
  6. 2.1 10 km S of Princeton, Canada
  7. 2.2 1 km E of Princeton, Canada
  8. 2.1 11 km S of Princeton, Canada
  9. 2.2 10 km S of Princeton, Canada
  10. 1.9 8 km S of Princeton, Canada
  11. 2.0 12 km S of Princeton, Canada
  12. 1.9 12 km S of Princeton, Canada
  13. 2.1 10 km S of Princeton, Canada
  14. 2.0 8 km SSE of Princeton, Canada
  15. 2.0 8 km SSE of Princeton, Canada

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.