A 4.0-magnitude earthquake jolted folks awake within the Los Angeles space early Monday, based on the United States Geological Survey and the reactions on social media.

The quake occurred at about 4:45 a.m. native time, about 30 minutes after a 3.3-magnitude earthquake was felt close by.

Dr. Lucy Jones, a seismologist on the Seismological Laboratory of Caltech, said on Twitter that it “would have been felt by most people awake” in Los Angeles. Others reported on social media that the tremors have been robust sufficient to shake them out of their slumber.

But primarily based on early studies, it was not thought of harmful.

“Many Angelenos slept through it, and we have no reports of any significant damage,” stated Brian Humphrey, a spokesman for the Los Angeles Fire Department.

There have been a number of small earthquakes within the Los Angeles space this week, together with one measuring at 3.4 on Sunday.