DALLAS – A small earthquake followed by an aftershock rattled a suburb west of Dallas overnight, cracking some walls and knocking down pictures, but authorities reported no serious damage and the unscathed Dallas-Fort Worth airport near the epicenter kept up normal flight operations.

Emergency officials said they had no indications of any injuries from Saturday's late-night quake.

The initial earthquake measuring a preliminary magnitude of 3.4 struck at 11:05 p.m. CDT on Saturday and was centered about 2 miles north of the Dallas suburb of Irving, the US Geological Survey's national earthquake monitoring center in Golden, Colo., reported. USGS Geophysicist Randy Baldwin told The Associated Press from Colorado that the initial quake lasted several seconds and appeared strong enough to be felt up to 15 or 20 miles away.