0 km WNW of Mission, Canada

2020-08-15 10:08 UTC · 7.0 km deep · released about 13 lb of TNT

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: 2020-08-15 10:08 UTC
Magnitude: M 1.8 (ml)
Depth: 7.0 km below the surface
Felt: 1 report · strongest reported intensity II
Nearest: Whatcom County, 47 km SE
Status: Reviewed by a seismologist

USGS · last changed by USGS 2233 days ago · we first saw it 2233 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

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.

Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
Magna, Utah 2020 M 5.7 840,000× the energy of this one
Around the size people start to feel M 3.0 75× the energy of this one
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

Map loads when it scrolls into view

Epicentre 49.1338, -122.3047. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction
Whatcom County, WA	47 km (29 mi)	NW of here	earthquakes near Whatcom County
Skagit County, WA	80 km (50 mi)	NNW of here	earthquakes near Skagit County
San Juan County, WA	91 km (57 mi)	NE of here	earthquakes near San Juan County
Island County, WA	112 km (69 mi)	NNE of here	earthquakes near Island County
Clallam County, WA	163 km (101 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.

1.6 6 km SW of Chilliwack, Canada 23:33 UTC
1.5 12 km ENE of Mission, Canada 23:26 UTC
1.8 2 km SW of Deming, Washington 09:14 UTC
1.6 11 km ENE of Abbotsford, Canada 22:36 UTC
1.5 6 km ENE of Abbotsford, Canada 22:41 UTC
1.5 5 km ENE of Abbotsford, Canada 22:42 UTC
1.6 Washington 22:22 UTC
2.1 7 km SSW of Birch Bay, Washington 00:46 UTC
1.5 4 km NW of Glacier, Washington 10:57 UTC
1.5 0 km WNW of Sumas, Washington 22:15 UTC
1.6 12 km NE of Abbotsford, Canada 00:57 UTC
1.6 11 km ENE of Abbotsford, Canada 20:22 UTC
1.7 12 km NE of Abbotsford, Canada 21:44 UTC
2.2 12 km ENE of Abbotsford, Canada 23:45 UTC
1.7 Washington 22:05 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 09:10 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

The official USGS event page — the source of record for every value above
Did you feel it? Report it to USGS — reports go to USGS, not to us
ShakeMap for this event, when USGS has produced one

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.