QuakeIndex

explosion · reviewed by a seismologist

M 2.0ml

Washington-British Columbia border region

· -0.5 km deep · released about 36 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Jefferson County 27 kmClallam County 28 kmSan Juan County 59 kmIsland County 65 kmKitsap County 80 kmMason County 82 kmGrays Harbor County 107 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 2.0 (ml)
Depth
-0.5 km below the surface
Felt
1 report
Nearest
Jefferson County, 27 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1146 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.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 36 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 420,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 300,000× the energy of this one
  3. Around the size people start to feel M 3.0 27× the energy of this one
  4. This earthquake M 2.0 about 36 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 48.0517, -123.5245. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Jefferson County, WA 27 km (17 mi) N of here earthquakes near Jefferson County
Clallam County, WA 28 km (17 mi) ESE of here earthquakes near Clallam County
San Juan County, WA 59 km (37 mi) SSW of here earthquakes near San Juan County
Island County, WA 65 km (40 mi) W of here earthquakes near Island County
Kitsap County, WA 80 km (50 mi) NW of here earthquakes near Kitsap County
Mason County, WA 82 km (51 mi) NNW of here earthquakes near Mason County

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

Aftershocks so far

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

  1. 2.1 6 km ENE of Bell Hill, Washington
  2. 1.8 34 km NE of Amanda Park, Washington
  3. 1.7 35 km NE of Amanda Park, Washington
  4. 2.5 11 km SSW of River Road, Washington
  5. 1.9 14 km NNE of Port Angeles East, Washington
  6. 1.8 21 km S of Port Angeles East, Washington
  7. 2.4 40 km NE of Amanda Park, Washington
  8. 2.4 11 km S of Metchosin, Canada
  9. 2.0 35 km NE of Amanda Park, Washington
  10. 1.7 2 km S of River Road, Washington
  11. 1.6 3 km N of Langford, Canada
  12. 1.8 10 km S of Victoria, Canada
  13. 2.3 5 km SSE of Esquimalt, Canada
  14. 2.9 8 km SW of Port Angeles, Washington
  15. 1.5 1 km NNW of Port Angeles East, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.1 on 2018-11-19 — it released about 1,100 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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