10/01/2026
Summerville felt it coming. Four days before, people out there felt small shocks, and the next morning houses in Charleston were rocking and windows were rattling. Nobody knew what it meant.
Then just before 10 at night on August 31, the biggest earthquake on record in the U.S. east of the Appalachians hit right here, centered around Middleton Place on the Ashley River. People ran into the dark streets. Sick neighbors were carried out on mattresses and laid in the road. Almost the whole city slept outside while the aftershocks kept coming, and with the telegraph lines down and the railroad wrecked, Charleston was cut off from the world.
Under their feet, something even stranger was happening. The Lowcountry sits on loose sand soaked with groundwater. The shaking squeezed that sand so hard the water had nowhere to go but up, and it blasted through the ground carrying the sand with it. When it was over, little sand volcanoes called craterlets covered more than 270 square miles of Charleston, Berkeley, and Dorchester counties. The USGS photographed one at a spot called Ten Mile Hill.
Geologists later found older craterlets buried under the ground. At least three earthquakes in the last 7,200 years did the same thing long before 1886.
Same sand. Same groundwater. Still right under your feet.
