QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

20 km SSE of Mansfield, Washington

· 10 km deep · released about 6.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Douglas County 15 kmGrant County 47 kmChelan County 82 kmLincoln County 87 kmKittitas County 100 kmOkanogan County 103 kmAdams County 106 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 1.6 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Douglas County, 15 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1099 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 6.8 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
  3. Around the size people start to feel M 3.0 140× the energy of this one
  4. This earthquake M 1.6 about 6.8 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 47.6328, -119.5733. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Douglas County, WA 15 km (9 mi) SE of here earthquakes near Douglas County
Grant County, WA 47 km (29 mi) N of here earthquakes near Grant County
Chelan County, WA 82 km (51 mi) ESE of here earthquakes near Chelan County
Lincoln County, WA 87 km (54 mi) W of here earthquakes near Lincoln County
Kittitas County, WA 100 km (62 mi) NE of here earthquakes near Kittitas County
Okanogan County, WA 103 km (64 mi) S of here earthquakes near Okanogan 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. 2.3 4 km NW of Waterville, Washington
  2. 1.7 7 km WSW of Chelan, Washington
  3. 1.5 7 km SSE of Chelan Falls, Washington
  4. 1.8 12 km WNW of Mansfield, Washington
  5. 1.6 13 km E of Waterville, Washington
  6. 2.5 4 km NW of Waterville, Washington
  7. 2.4 5 km SSW of Chelan Falls, Washington
  8. 1.6 5 km NW of Waterville, Washington
  9. 2.2 5 km N of Waterville, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.