QuakeIndex

explosion · reviewed by a seismologist

M 1.7ml

Earthquake near Leavenworth, WA

USGS: 24 km NNW of Leavenworth, Washington

4:56 am PST, Mar 4, 2019 · · -0.6 km deep · released about 10 lb of TNT

Every earthquake near Leavenworth Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Chelan County 10 kmKittitas County 77 kmDouglas County 78 kmSnohomish County 81 kmKing County 90 kmOkanogan County 110 kmSkagit County 110 kmGrant County 116 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
4:56 am PST on 4 March 2019 ()
Where
25 km (15 mi) NNW of Leavenworth, WA · earthquakes near Leavenworth
Magnitude
M 1.7 (ml)
Depth
-0.6 km below the surface
Felt
no reports yet
Nearest
Chelan County, 10 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2769 days ago

A magnitude 1.7 earthquake was recorded 25 km (15 mi) NNW of Leavenworth, WA, at 4:56 am PST on 4 March 2019 (12:56 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 92× the energy of this one
  4. This earthquake M 1.7 about 10 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 47.8150, -120.7335. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Chelan County, WA 10 km (6 mi) ENE earthquakes near Chelan County
Kittitas County, WA 77 km (48 mi) S earthquakes near Kittitas County
Douglas County, WA 78 km (49 mi) E earthquakes near Douglas County
Snohomish County, WA 81 km (51 mi) WNW earthquakes near Snohomish County
King County, WA 90 km (56 mi) WSW earthquakes near King County
Okanogan County, WA 110 km (68 mi) NE earthquakes near Okanogan 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 12 km W of Entiat, Washington
  2. 1.9 10 km SSW of Granite Falls, Washington
  3. 1.7 23 km NW of Granite Falls, Washington
  4. 1.8 7 km W of Entiat, Washington
  5. 1.6 15 km WSW of Methow, Washington
  6. 1.8 2 km NNE of Entiat, Washington
  7. 2.6 10 km WNW of Entiat, Washington
  8. 1.7 17 km W of Leavenworth, Washington
  9. 1.7 7 km W of Entiat, Washington
  10. 2.1 8 km S of Entiat, Washington
  11. 1.9 4 km SW of Entiat, Washington
  12. 2.0 6 km NNE of Entiat, Washington
  13. 1.7 44 km WSW of Twisp, Washington
  14. 1.6 10 km NW of Entiat, Washington
  15. 1.8 44 km WSW of Twisp, 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.