Radar Data Reveals Increasing Landslide Rates in Palos Verdes Peninsula
Radar data from NASA has shown alarming rates of landslides along the Palos Verdes Peninsula, located south of Los Angeles. These landslides are posing a threat to hundreds of structures in the area.
The data from NASA’s Jet Propulsion Laboratory indicated that the terrain of the peninsula shifted at a rate of 4 inches per week following heavy rainfall in 2024. This movement was accelerated by weather events after the remnants of Hurricane Hilary impacted the region in the summer of 2023.
The Palos Verdes Peninsula, situated about 25 miles south of downtown Los Angeles, has a history of historic landslides. However, the recent record rains in 2024 caused some ground to give way, leading to a state of emergency being declared in the area.
Some homes have been severely affected, with residents either abandoning their properties or living in fear of further movement in the terrain. NASA utilized its Uninhabited Aerial Vehicle Synthetic Aperture Radar to create a visualization of the affected region, highlighting the speed and direction of the soil movement.
According to Alexander Handwerger, a JPL landslide scientist, the speed of the movement poses a significant risk to human life and infrastructure. Landslides, categorized as a form of “mass wasting,” are triggered by various factors such as rainfall, snowmelt, erosion, earthquakes, volcanic eruptions, and human activities.
States like Oregon, Washington, California, and Idaho are particularly vulnerable to landslides in the Western region, causing significant financial losses annually. It’s important for homeowners to note that damage from landslides is typically not covered by standard insurance policies.
In response to the crisis, the City of Rancho Palos Verdes, FEMA, and the California Governor’s Office of Emergency Services have initiated a $42 million buyout program for property owners in 2024. The city has taken measures such as installing deep dewatering wells to address the situation and is urging state and federal support for these efforts.
