A swarm of temblors shook the desert county of Imperial east of San Diego Monday night, prompting the Los Angeles Fire Department to go into “earthquake mode” at 9:55 p.m. as a precaution, according to the LAFD's Devin Gales. The biggest of the shakers was a magnitude 5.7 that struck five miles east-southeast of Ocotillo, Calif. at 9:26 p.m. The San Diego Union-Tribune reports the shaker was an aftershock to the massive, 7.2 quake that hit Easter Sunday north of Mexicali.

The 5.7 caused a short delay in the Major League Baseball match-up between the Padres and the Toronto Blue Jays at Petco Park in downtown San Diego, the U-T states. No injuries or damage was reported

The Sierra El Mayor 7.2 quake was reportedly felt by as many as 20 million people throughout the Southwest but caused comparatively little damage because it struck in the middle of the Mexican desert.

“It's sort of a myth that after shocks get smaller with time,” Kate Hutton of Caltech told Fox 11 News.

LA Weekly