QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

2 km ESE of Walnut Grove, Canada

· 4.8 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Whatcom County 66 kmSan Juan County 81 kmSkagit County 94 kmIsland County 111 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
4.8 km below the surface
Felt
no reports yet
Nearest
Whatcom County, 66 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2075 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 6.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 49.1587, -122.6065. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Whatcom County, WA 66 km (41 mi) WNW of here earthquakes near Whatcom County
San Juan County, WA 81 km (50 mi) NNE of here earthquakes near San Juan County
Skagit County, WA 94 km (58 mi) NW of here earthquakes near Skagit County
Island County, WA 111 km (69 mi) N of here earthquakes near Island County
Clallam County, WA 150 km (93 mi) NE of here earthquakes near Clallam County

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

Aftershocks so far

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

  1. 1.8 10 km W of Marietta, Washington
  2. 2.3 28 km NNE of Maple Ridge, Canada
  3. 2.0 2 km WNW of Deming, Washington
  4. 1.5 4 km SSW of Marietta, Washington
  5. 1.9 2 km S of Marietta-Alderwood, Washington
  6. 2.2 2 km S of Marietta-Alderwood, Washington
  7. 1.5 10 km ENE of Coquitlam, Canada
  8. 1.6 2 km SSW of Ferndale, Washington
  9. 1.8 2 km SSW of Ferndale, Washington
  10. 1.5 9 km WSW of Chilliwack, Canada
  11. 1.6 4 km NE of Bellingham, Washington
  12. 1.7 8 km E of Ferndale, Washington
  13. 1.9 9 km NE of Coquitlam, Canada
  14. 1.7 7 km NNW of Maple Ridge, Canada
  15. 1.5 5 km NNE of Lynden, Washington

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.