MONTHLY DINNER MEETING
Date: Monday, November 7, 2005
Location: The DoubleTree Club Hotel, Santa Ana, CA
Time: 6:00 p.m.-Social Hour; 7:00 p.m.-Dinner; 8:00 p.m.-Presentation
Cost: $25, when reservations made before noon on Friday, Nov. 4, $5 late fee for reservations made after noon on Friday, Nov. 4, $12 for students with a valid Student ID
Reservations: Please call (949) 442-1713, ext. 224
PRESENTER: Dr. Randall Jibson
TOPIC: The La Conchita Landslides of 1995 and 2005
ABSTRACT
The La Conchita landslide of 10 January 2005 damaged or destroyed 36 houses and killed 10 people. The landslide occurred at the culmination of a 15-day period of record rainfall in southern California. The landslide mobilized as a rapid debris flow that was, in fact, the remobilization of 200,000 m3 (15 percent) of the 1.3 million m3 deposit of a slower moving slump-earth flow that occurred in 1995. The mobilization of the same material twice in 10 years by very different mechanisms and with markedly different results is problematic from both scientific and hazard-warning perspectives. The variety of landslide hazards that continues to plague the La Conchita community presents significant technical and political challenges.
BIO
Randy Jibson received his Bachelor's degree in geology from San Diego State University. He attended graduate school at Stanford University where he received a Masters degree in civil (geotechnical) engineering and a Ph.D. in geology. He is currently a Research Geologist at the U.S. Geological Survey (USGS) in Golden, Colorado.
During his 26 years at the USGS, he has conducted research on a wide variety of landslide processes. He has conducted numerous post-earthquake investigations in the United States and throughout the world and is an internationally recognized expert in earthquake-triggered landslides. Most recently, he has developed methods to assess and map regional seismic landslide hazards using displacement-based methods.
He served as the Coordinator of the USGS Landslide Hazards Reduction Program for several years and has published more than 140 research articles, reports, and abstracts.
Directions to this month's meeting:
From LAX/Long Beach/Seal Beach/Fountain Valley
Take 405 south to 55 Freeway North (toward Riverside), Exit at first exit (Mac Arthur Blvd). Turn left (West) on MacArthur. Make first available left at Hutton Center Drive. Hotel is one block down on the left.
From Los Angeles (Near Dodger Stadium)/Burbank/Buena Park
Take 5 Freeway south to 55 Freeway south (toward Newport), off at Mac Arthur Blvd. Turn right (west) at MacArthur, and then make first available left at Hutton Center. Hotel is one block down Hutton Centre Drive on the left.
From Riverside/Yorba Linda
Take 91 west to 55 Freeway south (toward Newport) off at Mac Arthur Blvd. Turn right (west) on MacArthur. Make first available left at Hutton centre drive. Hotel is one block down Hutton Centre, on the left.
From Diamond Bar/Fullerton/Anaheim
Take 57 Freeway south to 5 Freeway south to 55 Freeway south (toward Newport), off at Mac Arthur Blvd. Turn right (west) on MacArthur. Make first available left at Hutton Centre Drive. Hotel is one block down Hutton Centre Drive on the left.
