Los Angeles was rocked by a 3.6 magnitude earthquake just before midnight Monday night, with its epicenter about 13 miles from the shaky city center.

The U.S. Geological Survey said that some parts of the northwest of Los Angeles experienced “moderate” shaking, while much of the area experienced “light” or “weak” tremors.

Around two hours later, early Tuesday morning, another, weaker quake of magnitude 2.6 hit further down the San Andreas fault, just outside Ocotillo Wells, a rural town near the Salton Sea about 100 miles east of San Diego.