QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

9 km ESE of Metchosin, Canada

· 24 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 30 kmClallam County 43 kmIsland County 59 kmJefferson County 60 kmKitsap County 97 kmMason County 111 kmSkagit County 120 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 1.9 (md)
Depth
24 km below the surface
Felt
12 reports · strongest reported intensity III
Nearest
San Juan County, 30 km NE
Nearest mapped fault
Southern Whidbey Island fault, 7 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2935 days ago

A magnitude 1.9 earthquake was recorded 9 km ESE of Metchosin, Canada at 22:38 UTC on 2018-06-21. 12 people have reported feeling it to USGS. This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Port Angeles, Port Angeles East.

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 48.3380, -123.4200. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Juan County, WA 30 km (19 mi) NE earthquakes near San Juan County
Clallam County, WA 43 km (27 mi) SW earthquakes near Clallam County
Island County, WA 59 km (37 mi) ESE earthquakes near Island County
Jefferson County, WA 60 km (37 mi) S earthquakes near Jefferson County
Kitsap County, WA 97 km (60 mi) SE earthquakes near Kitsap County
Mason County, WA 111 km (69 mi) S earthquakes near Mason County

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

Aftershocks so far

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

  1. 2.0 9 km S of Friday Harbor, Washington
  2. 1.5 12 km ENE of North Saanich, Canada
  3. 3.0 10 km NW of Friday Harbor, Washington
  4. 1.6 6 km E of Oak Bay, Canada
  5. 2.3 11 km NNE of Six Mile, Canada
  6. 2.0 11 km NNW of Six Mile, Canada
  7. 1.7 3 km NNE of Six Mile, Canada
  8. 2.0 9 km NW of Friday Harbor, Washington
  9. 3.0 1 km WSW of Bell Hill, Washington
  10. 1.5 3 km WNW of North Saanich, Canada
  11. 2.0 17 km NW of Orcas, Washington
  12. 2.1 27 km SW of Port Angeles, Washington
  13. 1.6 2 km S of Oak Bay, Canada
  14. 1.5 7 km W of Orcas, Washington
  15. 2.6 9 km NW of Friday Harbor, 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.