A U.S. Geological Survey map shows the location of the earthquake.

A mild earthquake rattled the eastern reaches of San Diego County Friday.

The 3.5-magnitude temblor struck at about 2:45 p.m., centered 12 1/2 miles northeast of Mount Laguna in Anza-Borrego Desert State Park, according to the U.S. Geological Survey.

The quake caused no reported damage or injuries, officials said.

City News Service contributed to this article.