QuakeIndex

Earthquakes in Lewis County, Washington

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86

Elevated QuakeIndex 86 / 100

1 quake of M1.5 or larger in the last 7 days within 50 km. Normal for here is 0 to 1 in a week.

Compared against Lewis County, Washington's own 10 years · USGS catalogue · updated

The last 30 days

Aug 29 Sep 13 Sep 27
Each mark is a day's largest quake within range; its size is the magnitude. The shaded band is the magnitude a day's largest quake normally falls in here (M1.6–M1.9), from this place's own 10-year record. A mark above the band is a bigger day than usual.

Live · last 7 days

Latest earthquakes within 50 km

1 in the latest snapshot we hold; the full 7 days load from USGS as this page opens.

  1. 1.3 20 km E of Castle Rock, Washington 43 km (26 mi) NNE · 17 km deep

Source USGS · snapshot of

Where this is

Centre 46.580, -122.377 — the Census internal point, from the US Census Bureau Gazetteer (2024). Activity is measured within 50 km of it.

Largest on record nearby

MagnitudeWhenWhere
M 3.9 37 km SSE of Morton, Washington
M 3.8 20 km E of Castle Rock, Washington
M 3.5 20 km S of Morton, Washington
M 3.3 33 km SE of Morton, Washington
M 3.2 12 km SSW of Morton, Washington
M 3.1 3 km NNE of Onalaska, Washington
M 3.0 33 km NNE of Amboy, Washington
M 2.9 3 km N of Onalaska, Washington

From the QuakeIndex catalogue, built from the USGS FDSN event service · within 50 km of the centre above.

After an earthquake here