QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

2 km ESE of Duvall, Washington

· 19 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 29 kmSnohomish County 38 kmKitsap County 53 kmIsland County 71 kmPierce County 78 kmSkagit County 85 kmChelan County 101 kmMason County 101 kmThurston County 111 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 2.2 (ml)
Depth
19 km below the surface
Felt
12 reports · strongest reported intensity III
Nearest
King County, 29 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2460 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 12 people have reported feeling it to USGS.

How big was it?

This earthquake released about 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 60 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 47.7355, -121.9535. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 29 km (18 mi) NNW of here earthquakes near King County
Snohomish County, WA 38 km (24 mi) SSW of here earthquakes near Snohomish County
Kitsap County, WA 53 km (33 mi) ENE of here earthquakes near Kitsap County
Island County, WA 71 km (44 mi) SE of here earthquakes near Island County
Pierce County, WA 78 km (48 mi) N of here earthquakes near Pierce County
Skagit County, WA 85 km (53 mi) S of here earthquakes near Skagit 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. 1.8 3 km E of Granite Falls, Washington
  2. 1.5 2 km SSW of Carnation, Washington
  3. 1.8 3 km SSE of Kingston, Washington
  4. 2.0 3 km SE of Southworth, Washington
  5. 1.8 1 km S of Snoqualmie, Washington
  6. 1.8 2 km S of Monroe, Washington
  7. 2.0 2 km SE of Duvall, Washington
  8. 1.8 2 km ENE of Maple Valley, Washington
  9. 1.6 4 km E of Cathcart, Washington
  10. 1.7 2 km ENE of Granite Falls, Washington
  11. 2.2 8 km E of Carnation, Washington
  12. 3.2 3 km NNW of Lake Marcel-Stillwater, Washington
  13. 1.8 1 km E of Granite Falls, Washington
  14. 1.5 1 km NNW of Maple Valley, Washington
  15. 1.6 5 km WSW of North Bend, 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 3,700 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.