A magnitude 3.8 earthquake shook Malibu and the Westside of Los Angeles early Friday afternoon, according to the U.S. Geological Survey. The epicenter was located approximately 4.6 miles north of Point Dume, within the mountainous region just above Malibu’s city limits. This event marks the seventh earthquake of such magnitude recorded in this area in 2023.
The USGS reported that the shaking was classified as “weak,” aligning with Level 3 on the Modified Mercalli Intensity Scale. Residents in Malibu, Thousand Oaks, Calabasas, Woodland Hills, Canoga Park, Winnetka, and Reseda likely felt this tremor. Such weak shaking is typically noticeable indoors, particularly on upper floors, and can slightly move stationary vehicles.
Moreover, areas like the San Fernando Valley, Santa Monica, and the greater Los Angeles Basin experienced Level 2 shaking, which is only perceptible to a few individuals, especially those on upper floors. In Mar Vista, some occupants reported feeling tremors on the second floor for about 10 to 15 seconds, akin to a desk being nudged.
The recent quake’s epicenter was located near where more significant earthquakes have occurred, including a magnitude 4.7 event on September 12 and a magnitude 4.6 quake on February 9, which had notable effects like items falling from counters and cracks appearing in walls.
According to seismologist Lucy Jones, Southern California has faced 15 distinct seismic sequences this year featuring at least one earthquake of magnitude 4 or above, marking the most significant annual total in 65 years, surpassing 1988’s record.
While the number of smaller earthquakes is on the rise, experts advise that this ongoing seismicity does not predict the timing of a potentially damaging earthquake. The last major quake to afflict L.A. County occurred 30 years ago, when a magnitude 6.7 earthquake struck the San Fernando Valley, resulting in multiple casualties and extensive damage.
Historically, Southern California’s last significant megaquake took place in 1857, measuring approximately 7.8 on the Richter scale, impacting a substantial stretch of the San Andreas Fault.
As the region continues to experience seismic activity, it’s vital for residents to reassess their preparedness for future earthquakes. The Unshaken newsletter offers helpful tips on emergency preparedness, including advice on earthquake kits and essential apps. Staying informed and ready can make a significant difference when the next significant quake occurs.
In summary, while Friday’s earthquake seemed minor, the frequency of seismic activity serves as a reminder for residents to prioritize earthquake preparedness. Investing time in education about safety measures can foster resilience in the face of future seismic events.