QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

5 km WSW of Mercer Island, Washington

· 26 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 29 kmKing County 34 kmPierce County 56 kmSnohomish County 68 kmMason County 70 kmIsland County 74 kmThurston County 80 kmJefferson County 97 kmLewis County 108 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 1.5 (ml)
Depth
26 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 29 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 51 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 47.5468, -122.2830. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 29 km (18 mi) ESE of here earthquakes near Kitsap County
King County, WA 34 km (21 mi) W of here earthquakes near King County
Pierce County, WA 56 km (35 mi) N of here earthquakes near Pierce County
Snohomish County, WA 68 km (43 mi) SW of here earthquakes near Snohomish County
Mason County, WA 70 km (44 mi) ENE of here earthquakes near Mason County
Island County, WA 74 km (46 mi) SSE of here earthquakes near Island County

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

Aftershocks so far

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

  1. 1.1 3 km NNW of Dash Point, Washington
  2. 1.2 1 km NW of Lake Marcel-Stillwater, Washington
  3. 1.7 0 km W of Lake Stickney, Washington
  4. 2.1 10 km ENE of Fall City, Washington
  5. 1.0 5 km WSW of Wilderness Rim, Washington
  6. 2.4 5 km SW of Wilderness Rim, Washington
  7. 1.1 2 km NW of Lake Marcel-Stillwater, Washington
  8. 0.8 4 km E of Carnation, Washington
  9. 2.0 3 km ESE of East Renton Highlands, Washington
  10. 0.5 2 km S of Union Hill-Novelty Hill, Washington
  11. 2.1 4 km SW of Wilderness Rim, Washington
  12. 2.1 4 km NNE of Snoqualmie, Washington
  13. 1.6 1 km NNE of Maple Valley, Washington
  14. 1.5 5 km SSW of Monroe, Washington
  15. 1.5 2 km WNW of Ames Lake, 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 40,000 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.