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NASA Radar Imagery Reveals Details About Los Angeles-Area Landslides


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A topographic map of Rancho Palos Verdes, CA (Sept. 18–Oct. 17, 2024) shows landslide velocity in cm/week, with red areas moving fastest (≥10 cm/week). The slide extends beyond the 2007 boundary toward Abalone Cove. An arrow marks the landslide direction southward.
NASA’s UAVSAR airborne radar instrument captured data in fall 2024 showing the mo-tion of landslides on the Palos Verdes Peninsula following record-breaking rainfall in Southern California in 2023 and another heavy-precipitation winter in 2024. Darker red indicates faster motion.
NASA Earth Observatory

Analysis of data from NASA radar aboard an airplane shows that the decades-old active landslide area on the Palos Verdes Peninsula has expanded.

Researchers at NASA’s Jet Propulsion Laboratory in Southern California used data from an airborne radar to measure the movement of the slow-moving landslides on the Palos Verdes Peninsula in Los Angeles County. The analysis determined that, during a four-week period in the fall of 2024, land in the residential area slid toward the ocean by as much as 4 inches (10 centimeters) per week.

Portions of the peninsula, which juts into the Pacific Ocean just south of the city of Los Angeles, are part of an ancient complex of landslides and has been moving for at least the past six decades, affecting hundreds of buildings in local communities. The motion accelerated, and the active area expanded following record-breaking rainfall in Southern California in 2023 and heavy precipitation in early 2024.

To create this visualization, the Advanced Rapid Imaging and Analysis (ARIA) team used data from four flights of NASA’s Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) that took place between Sept. 18 and Oct. 17. The UAVSAR instrument was mounted to a Gulfstream III jet flown out of NASA’s Armstrong Flight Research Center in Edwards, California, and the four flights were planned to estimate the speed and direction of the landslides in three dimensions.

In the image above, colors indicate how fast parts of the landslide complex were moving in late September and October, with the darkest reds indicating the highest speeds. The arrows represent the direction of horizontal motion. The white solid lines are the boundaries of the active landslide area as defined in 2007 by the California Geological Survey.

“In effect, we’re seeing that the footprint of land experiencing significant impacts has expanded, and the speed is more than enough to put human life and infrastructure at risk,” said Alexander Handwerger, the JPL landslide scientist who performed the analysis.

The insights from the UAVSAR flights were part of a package of analyses by the ARIA team that also used data from ESA’s (the European Space Agency’s) Copernicus Sentinel-1A/B satellites. The analyses were provided to California officials to support the state’s response to the landslides and made available to the public at NASA’s Disaster Mapping Portal.

Handwerger is also the principal investigator for NASA’s upcoming Landslide Climate Change Experiment, which will use airborne radar to study how extreme wet or dry precipitation patterns influence landslides. The investigation will include flights over coastal slopes spanning the California coastline.

More About ARIA, UAVSAR

The ARIA mission is a collaboration between JPL and Caltech, which manages JPL for NASA, to leverage radar and optical remote-sensing, GPS, and seismic observations for science as well as to aid in disaster response. The project investigates the processes and impacts of earthquakes, volcanoes, landslides, fires, subsurface fluid movement, and other natural hazards.

UAVSAR has flown thousands of radar missions around the world since 2007, studying phenomena such as glaciers and ice sheets, vegetation in ecosystems, and natural hazards like earthquakes, volcanoes, and landslides.

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Andrew Wang / Jane J. Lee
Jet Propulsion Laboratory, Pasadena, Calif.
626-379-6874 / 818-354-0307
andrew.wang@jpl.nasa.gov / jane.j.lee@jpl.nasa.gov

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      Los medios acreditados tendrán la oportunidad de participar en sesiones informativas previas al lanzamiento y entrevistas con miembros clave de la misión antes del lanzamiento, así como de cubrir el lanzamiento. La NASA comunicará más detalles sobre el calendario de eventos para los medios de comunicación a medida que se acerque la fecha del lanzamiento.
      Las fechas límites de acreditación de medios para el lanzamiento son:
      Los miembros de medios de comunicación sin ciudadanía estadounidense deben enviar su solicitud a más tardar a las 11:59 p.m. EDT del domingo, 31 de agosto. Los miembros de medios de comunicación con ciudadanía estadounidense deben enviar su solicitud a más tardar a las 11:59 p.m. EDT del jueves, 4 de septiembre. Todas las solicitudes de acreditación deben enviarse en línea en: 
      https://media.ksc.nasa.gov
      La política de acreditación de medios de la NASA está disponible en línea. Si tiene preguntas sobre el proceso de acreditación, por favor envíelas a: ksc-media-accreditat@mail.nasa.gov. Para otras preguntas, por favor póngase en contacto con el centro de prensa del centro Kennedy de la NASA: +1 321-867-2468.
      Para obtener información en español en sobre el Centro Espacial Kennedy, comuníquese con Antonia Jaramillo: 321-501-8425. Si desea solicitar entrevistas en español sobre IMAP, póngase en contacto con María-José Viñas: maria-jose.vinasgarcia@nasa.gov.  
      La sonda IMAP de la NASA utilizará diez instrumentos científicos para estudiar y mapear la heliosfera, una vasta burbuja magnética que rodea al Sol y protege nuestro sistema solar de la radiación proveniente del espacio interestelar. Esta misión y sus dos compañeros de viaje orbitarán el Sol cerca del punto de Lagrange 1, a aproximadamente 1,6 millones de kilómetros (un millón de millas) de la Tierra, donde escaneará la heliosfera, analizará la composición de partículas cargadas e investigará cómo esas partículas se mueven a través del sistema solar. Esto proporcionará información sobre cómo el Sol acelera las partículas cargadas, aportando información esencial para comprender el entorno meteorológico espacial en todo el sistema solar. IMAP también monitoreará continuamente el viento solar y la radiación cósmica. La comunidad científica podrá usar estos datos para evaluar capacidades nuevas y mejoradas para herramientas y modelos de predicción de la meteorología espacial, que son vitales para la salud de los humanos que exploran el espacio y la longevidad de sistemas tecnológicos, como satélites y redes eléctricas, que pueden afectar la vida en la Tierra.
      El Observatorio Carruthers de la Geocorona de la agencia es un pequeño satélite concebido para estudiar la exosfera, la parte más externa de la atmósfera de la Tierra. Utilizando cámaras ultravioletas, monitoreará cómo la meteorología espacial del Sol impacta la exosfera, la cual juega un papel crucial en la protección de la Tierra contra eventos de meteorología espacial que pueden afectar satélites, comunicaciones y líneas eléctricas. La exosfera, una nube de hidrógeno neutro que se extiende hasta la Luna y posiblemente más allá, se crea por la descomposición del agua y el metano por la luz ultravioleta del Sol, y su brillo, conocido como la geocorona, solo se ha observado a nivel mundial cuatro veces antes de esta misión.
      La misión SWFO-L1, gestionada por la NOAA y desarrollada con el Centro de Vuelo Espacial Goddard de NASA en Greenbelt, Maryland, y socios comerciales, utilizará un conjunto de instrumentos para proporcionar mediciones en tiempo real del viento solar, junto con un coronógrafo compacto para detectar eyecciones de masa coronal del Sol. El observatorio, que sirve como baliza de alerta temprana para fenómenos meteorológicos espaciales potencialmente destructivos, permitirá pronósticos más rápidos y precisos. Sus datos, disponibles las 24 horas del día, los 7 días de la semana, ayudarán al Centro de Predicción Meteorológica Espacial de la NOAA a proteger infraestructuras vitales, intereses económicos y la seguridad nacional, tanto en la Tierra como en el espacio.
      David McComas, profesor de la Universidad de Princeton, lidera la misión IMAP con un equipo internacional de 25 instituciones asociadas. El Laboratorio de Física Aplicada Johns Hopkins en Laurel, Maryland, construyó la nave espacial y opera la misión. IMAP de la NASA es la quinta misión en el portafolio del programa de Sondas Solares Terrestres de la NASA. La División de Exploradores y Proyectos de Heliofísica en el centro Goddard de la NASA gestiona el programa para la División de Heliofísica de la Dirección de Misiones Científicas de la NASA.
      Para más detalles (en inglés) sobre la misión IMAP y actualizaciones sobre los preparativos de lanzamiento, visite: 
      https://science.nasa.gov/mission/imap/
      -fin-
      Abbey Interrante / María José Viñas
      Sede central de la NASA, Washington
      301-201-0124
      abbey.a.interrante@nasa.gov / maria-jose.vinasgarcia@nasa.gov
      Sarah Frazier
      Centro de Vuelo Espacial Goddard, Greenbelt, Md.
      202-853-7191
      sarah.frazier@nasa.gov
      Leejay Lockhart
      Centro Espacial Kennedy, Fla.
      321-747-8310
      leejay.lockhart@nasa.gov
      John Jones-Bateman
      Servicio de Satélites e Información de la NOAA, Silver Spring, Md.
      202-242-0929
      john.jones-bateman@noaa.gov
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      Last Updated Aug 21, 2025 LocationNASA Headquarters Related Terms
      NASA en español Carruthers Geocorona Observatory (GLIDE) Goddard Space Flight Center Heliophysics Heliophysics Division IMAP (Interstellar Mapping and Acceleration Probe) Kennedy Space Center Launch Services Program Science & Research Science Mission Directorate Space Weather View the full article
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