QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0ml

4 km E of Oso, Washington

· 15 km deep · released about 27 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Skagit County 25 kmSnohomish County 25 kmIsland County 61 kmWhatcom County 63 kmKing County 87 kmKitsap County 91 kmSan Juan County 95 kmChelan County 103 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
15 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Skagit County, 25 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2179 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 27 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 5.8 560,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 390,000× the energy of this one
  3. Around the size people start to feel M 3.0 35× the energy of this one
  4. This earthquake M 2.0 about 27 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 48.2720, -121.8673. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Skagit County, WA 25 km (15 mi) S of here earthquakes near Skagit County
Snohomish County, WA 25 km (16 mi) NNW of here earthquakes near Snohomish County
Island County, WA 61 km (38 mi) ENE of here earthquakes near Island County
Whatcom County, WA 63 km (39 mi) S of here earthquakes near Whatcom County
King County, WA 87 km (54 mi) N of here earthquakes near King County
Kitsap County, WA 91 km (57 mi) NE of here earthquakes near Kitsap 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. 1.6 9 km NNE of Hamilton, Washington
  2. 2.8 9 km NNE of Hamilton, Washington
  3. 1.6 1 km WNW of Lake Cavanaugh, Washington
  4. 1.9 9 km NNE of Hamilton, Washington
  5. 2.3 9 km NNE of Hamilton, Washington
  6. 1.6 2 km ENE of Granite Falls, Washington
  7. 1.7 5 km NNE of Oso, Washington
  8. 2.2 2 km N of Mount Vernon, Washington
  9. 1.8 3 km NW of Mount Vernon, Washington
  10. 2.2 6 km NE of Oso, Washington
  11. 1.7 3 km ENE of Granite Falls, Washington
  12. 1.8 5 km SW of Lake Cavanaugh, Washington
  13. 2.2 8 km NE of Oso, Washington
  14. 1.9 2 km SSW of Hamilton, Washington
  15. 2.1 4 km SSW of Hamilton, 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 4.6 on 2019-07-12 — it released about 8,200 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.