QuakeIndex

explosion · reviewed by a seismologist

M 1.8ml

12 km ENE of Mission, Canada

· -0.7 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Whatcom County 42 kmSkagit County 78 kmSan Juan County 102 kmIsland County 118 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 1.8 (ml)
Depth
-0.7 km below the surface
Felt
no reports yet
Nearest
Whatcom County, 42 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 90 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 49.1618, -122.1338. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Whatcom County, WA 42 km (26 mi) NNW of here earthquakes near Whatcom County
Skagit County, WA 78 km (48 mi) NNW of here earthquakes near Skagit County
San Juan County, WA 102 km (63 mi) NE of here earthquakes near San Juan County
Island County, WA 118 km (74 mi) NNE of here earthquakes near Island County

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

Aftershocks so far

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

  1. 0.9 9 km ENE of Abbotsford, Canada
  2. 1.2 12 km ENE of Mission, Canada
  3. 1.6 7 km ENE of Abbotsford, Canada
  4. 1.5 13 km N of Maple Ridge, Canada
  5. 1.8 8 km N of Maple Falls, Washington
  6. 1.5 11 km NE of Abbotsford, Canada
  7. 1.8 5 km E of Acme, Washington
  8. 1.5 10 km NE of Abbotsford, Canada
  9. 1.7 12 km E of Mission, 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.