QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

10 km ESE of Salt Spring Island, Canada

· 14 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 37 kmClallam County 86 kmIsland County 87 kmJefferson County 111 kmWhatcom County 111 kmSkagit 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 1.9 (ml)
Depth
14 km below the surface
Felt
2 reports
Nearest
San Juan County, 37 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 235 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 25 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 5.8 600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 420,000× the energy of this one
  3. Around the size people start to feel M 3.0 38× the energy of this one
  4. This earthquake M 1.9 about 25 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 48.7967, -123.3540. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 37 km (23 mi) NNW of here earthquakes near San Juan County
Clallam County, WA 86 km (53 mi) NNE of here earthquakes near Clallam County
Island County, WA 87 km (54 mi) NW of here earthquakes near Island County
Jefferson County, WA 111 km (69 mi) N of here earthquakes near Jefferson County
Whatcom County, WA 111 km (69 mi) W of here earthquakes near Whatcom County
Skagit County, WA 118 km (73 mi) WNW of here earthquakes near Skagit 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. 1.8 3 km WNW of Ladysmith, Canada
  2. 1.7 14 km SW of Cowichan Bay, Canada
  3. 1.6 8 km WNW of Orcas, Washington
  4. 1.7 8 km WNW of Orcas, Washington
  5. 1.8 8 km WNW of Orcas, Washington
  6. 1.9 10 km S of Cowichan Bay, Canada
  7. 2.2 9 km SW of White Rock, Canada
  8. 2.2 5 km NW of Orcas, Washington
  9. 1.5 7 km WNW 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.5 on 2025-03-03 — it released about 6,700 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.