A magnitude 4.4 earthquake struck Highland Park, Los Angeles, at 12:20 p.m. on Monday, causing widespread shaking felt from San Diego to Simi Valley. Initially reported as a 4.7 magnitude by the European-Mediterranean Seismological Centre, it was later downgraded by the U.S. Geological Survey. Although there were no major reports of damage, minor incidents included a broken pipe at Pasadena City Hall that led to water flooding and the temporary entrapment of one individual in an elevator. The Los Angeles Fire Department activated 'earthquake mode' to assess potential infrastructure damage, but concluded operations shortly after with no significant findings. Residents described the tremor as particularly jarring, with many sharing their experiences on social media. Authorities have advised the public to be prepared for potential aftershocks.