A magnitude 4.4 earthquake centred in El Sereno rattled the Los Angeles area on Monday afternoon, causing brief but widespread tremors across Southern California. While the quake was felt over a wide region, there were no immediate reports of major damage. However, the shaking did result in some disruptions, including a burst water pipe at Pasadena City Hall and minor incidents at local businesses.
The earthquake, which struck at 12:20 p.m., was strong enough to be felt from Los Angeles to San Diego and Ventura. Residents across the region reported a sudden jolt, with many noting that the tremors were strong enough to knock items off shelves and set off car alarms. In Alhambra, the shaking caused shampoo bottles to fall from the shelves at a local Target, and in Highland Park, coffee spilled off tables as windows rattled.
Pasadena City Hall was among the few places that experienced noticeable damage. A water pipe burst, leading to an hour-long leak before it was turned off. Additionally, an issue with the building’s elevators left one employee trapped for about 20 minutes. The elevators will remain closed until repairs can be made. City officials also conducted precautionary inspections at the Rose Bowl, though no significant damage was reported.
The earthquake, though minor, served as a stark reminder of the seismic risks in Southern California. Seismologist Lucy Jones, a research associate at Caltech, noted that the quake occurred on the same fault network responsible for the 1987 Whittier Narrows earthquake, which was a magnitude 5.9 event. However, she pointed out that it was too early to definitively associate the latest quake with a specific fault, given the complexity of the fault systems in the region.
The Los Angeles County Fire Department and other local agencies quickly responded to the quake, conducting surveys and checking for damage. Fortunately, there were no immediate reports of serious damage or injuries. The South Pasadena Police Department noted that the only calls they received were reports of home alarms being triggered by the quake.
For many Southern California residents, the earthquake served as a wake-up call about the importance of preparedness. The region’s earthquake early warning system, MyShake, once again proved its worth, with many residents receiving alerts on their phones seconds before the shaking began. This system, developed by UC Berkeley in partnership with the California Governor’s Office of Emergency Services, provides warnings to users in California, Oregon, and Washington.
In the aftermath of the quake, officials urged residents to take the event as an opportunity to review their emergency preparedness plans. With the possibility of larger earthquakes always looming in the region, staying prepared is key to minimizing the impact of future seismic events.
As Southern California continues to monitor for aftershocks, the relatively minor impact of Monday’s quake serves as a reminder of both the ever-present threat of earthquakes in the region and the importance of being ready for when a more significant event strikes.
