South Dakota has experienced a second earthquake in less than a month’s time.
A 3.1-magnitude quake shook an area north of Tyndall at about 9 a.m. Monday.
Sarah Meyer was at home south of Scotland when she felt it.
“It just shook – the floor shook, and I have a light fixture, one that hangs down kind of like a chandelier, and it shook,” she said. “So it just kind of rattled.”
Experts say the brief quake was not strong enough to cause damage. That’s similar to the 3.2-magnitude earthquake that rattled the Bowdle area Dec. 9.
There are about 100 documented earthquakes in South Dakota history. The state averages about two earthquakes every three years.
The state geologist says eastern South Dakota’s crust is still rebounding from compression caused by the last ice age. He says jumps in that rebound are the cause of many South Dakota earthquakes.
-Contact SDPB reporter Seth Tupper by email.