QuakeIndex

Earthquakes in South Dakota

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Too few earthquakes here to say what is "normal"

Only 29 earthquakes of M1.5 or largerhave been recorded in South Dakota in the 10 years of record we hold, and most weeks have none. A QuakeIndex score is a percentile against this place's own weeks — and when almost every week is empty, that number would just be reporting whether anything happened at all, dressed up as a percentile. So we do not publish one.

This is a statement about South Dakota, not about our data: it is a quiet place. There have been none of M1.5 or larger in the last 7 days.

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. There is not yet enough history here to draw a normal range.

Live · last 7 days

Latest earthquakes in South Dakota

None in South Dakota in the latest snapshot we hold; the full 7 days load from USGS as this page opens.

Source USGS · snapshot of

Where this is

Centre 44.283, -98.926 — the mean of this state’s place centroids, from the US Census Bureau Gazetteer (2024). Activity is measured across a rectangle drawn around the state, so a few earthquakes just over its border are counted too.

Largest on record in and around South Dakota

MagnitudeWhenWhere
M 3.7 10 km NE of Anoka, Nebraska
M 3.7 38 km NNW of Pierre, South Dakota
M 3.6 7 km W of Fairburn, South Dakota
M 3.4 10 km E of Edgemont, South Dakota
M 3.2 11 km E of Brownlee, Nebraska
M 3.2 16 km N of Valentine, Nebraska
M 3.2 4 km ENE of Draper, South Dakota
M 3.2 10 km NNW of Bowdle, South Dakota

From the QuakeIndex catalogue, built from the USGS FDSN event service · inside a rectangle drawn around South Dakota, which takes in some ground over its borders.

Counties in South Dakota

After an earthquake here