QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0ml

4 km SE of Swede Heaven, Washington

· 11 km deep · released about 32 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Snohomish County 23 kmSkagit County 28 kmWhatcom County 66 kmIsland County 74 kmKing County 86 kmChelan County 90 kmKitsap County 100 kmSan Juan County 109 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
11 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Snohomish County, 23 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1667 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 32 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 5.8 470,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 330,000× the energy of this one
  3. Around the size people start to feel M 3.0 30× the energy of this one
  4. This earthquake M 2.0 about 32 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 48.2582, -121.6813. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Snohomish County, WA 23 km (15 mi) NNE of here earthquakes near Snohomish County
Skagit County, WA 28 km (17 mi) SSE of here earthquakes near Skagit County
Whatcom County, WA 66 km (41 mi) S of here earthquakes near Whatcom County
Island County, WA 74 km (46 mi) E of here earthquakes near Island County
King County, WA 86 km (54 mi) N of here earthquakes near King County
Chelan County, WA 90 km (56 mi) WNW of here earthquakes near Chelan County

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

Aftershocks so far

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

  1. 1.6 6 km WSW of Lake Cavanaugh, Washington
  2. 1.6 2 km E of Granite Falls, Washington
  3. 1.7 15 km NE of Lake Cavanaugh, Washington
  4. 1.6 2 km E of Granite Falls, Washington
  5. 2.9 12 km NNE of Hamilton, Washington
  6. 1.9 6 km W of Lake Cavanaugh, Washington
  7. 2.0 15 km SSW of Concrete, Washington
  8. 1.6 2 km E of Granite Falls, Washington
  9. 2.0 14 km NE of Lake Cavanaugh, Washington
  10. 2.3 15 km NE of Lake Cavanaugh, Washington
  11. 1.8 1 km SSW of Three Lakes, Washington
  12. 1.6 6 km WSW of Darrington, Washington
  13. 1.6 4 km NNE of Oso, Washington
  14. 1.5 2 km ENE of Granite Falls, Washington
  15. 1.5 2 km E of Granite Falls, 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 6,900 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.