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SDAG Monthly Meeting
Joint Meeting with South Coast Geological Society
Wednesday, June 8, 2016

Location: El Adobe Restaurant
31891 Camino Capistrano
San Juan Capistrano
Phone: (949)493-1163

Take I-5 to the Ortega Highway exit, go west. Ortega Hwy dead-ends into Camino Capistrano (after 3 blocks); turn left and go about 11/2 blocks. El Adobe Restaurant is on the right side of the street. Parking lot is behind building. Additional parking can be found across the street...or...
Amtrak (El Adobe is 3 blocks south of the train station).
happy hour
5:30pm -
Social hour  
Cash Bar.
6:30pm -

Menu: Chips, Salsa, Chicken Enchilada, Chile Relleno, Beef Taco, Spanish Rice Refried Beans, and Dessert. Cash bar.

Cost: $35.00 for non-members, $30.00 for members, $15.00 for students. if pre-registered by the deadline, $5 extra if you did not make a reservation. Click the SDAG member checkbox on the reservation form if you are a member.

Reservations: Make your reservation online by clicking the button below no later than NOON, Monday, June 6. RESERVATIONS CANNOT BE ACCEPTED AFTER Monday at noon. Late reservations/cancellations are preferred over walk-ins or no-shows. Fees payable at the meeting or pre-pay with PayPal.
As a new payment option, there will be a phone credit card reader at the meeting.

If you are a current SDAG member and are not getting e-mail announcements,
make sure the SDAG secretary has your correct e-mail address.

7:30pm -

Speaker: Jeff Keaton

"The March 22, 2014, Oso Landslide: An Overview of the Geotechnical Extreme Events Reconnaissance (GEER) Response"

The Oso Landslide in Snohomish County, Washington, is among the most significant geologic disasters in recent U. S. history. The landslide occurred on a valley slope with documented history of intermittent landslide movement dating back to the 1940s; the most recent slope movement in 2006 blocked the North Fork of the Stillaguamish River and caused shallow flood damage to some of the nearby homes. The Oso Landslide is one of many landslides that have occurred on valley slopes above the North Fork of the Stillaguamish River.

The 22 March 2014 Oso Landslide generated vibrations at 10:37 A.M. local time that were recorded on nearby seismograph stations; it became a rapidly moving, unchannelized debris flow that spread out as it travelled about 1 km across the valley, damming the North Fork of the Stillaguamish River, destroying and carrying away about 50 homes, taking the lives of 43 people, and burying about 1.5 km of State Highway 530.

Developing and advancing strategies for adapting to weather-triggered earth surface processes requires an understanding of what lead to the collapse of the slope for enhanced public safety and so that communities and infrastructure systems can be designed for greater resiliency. The National Science Foundation-supported Geotechnical Extreme Events Reconnaissance (GEER) Association ( by 31 March 2014 assembled a team of seven professionals to investigate the landslide; authorization to access the landslide area was granted to the GEER team in May 2014. The primary focus of the GEER team is to document short-lived geotechnical features and make the findings publically available through the GEER website. The team's report will describe plausible precipitation, geologic, groundwater, and geotechnical models, impacts to infrastructure, and hazard-communication aspects of the disastrous landslide event.

The GEER report in Adobe Acrobat format can be downloaded at no cost from the GEER website ( A peer-reviewed publication by the authors also is available (Wartman et al., 2016, Geomorphology 253, 275-288), as well as articles in AEG News (December 2014) and Geo-Strata (July 2015).

Jeffrey R. Keaton specializes in quantifying hazardous natural processes for siting and design of all types of facilities in all geologic environments. He has degrees in Geological Engineering, Engineering (Geotechnical), and Geology. Keaton has been employed by consulting firms for over 45 years, and in Amec Foster Wheeler's Los Angeles office of since July 2005 where he is a Principal Engineering Geologist. He is registered in several states in the USA as an Engineer and as a Geologist; he hold the Envisiontm Sustainability Professional (ENV SP) credential from the Institute for Sustainable Infrastructure and is a Diplomate in Geotechnical Engineering of the Academy of Geo-Professionals.

He has remained active in professional societies throughout his career and is a active member and/or serves on a number of different committees or as an officer in organizations such as AEG, GSA, ASCE, and GEER.

Upcoming SDAG meetings - 2016

July 13: Steve Borron - Predicting Slope Failures Using Slope-Monitoring Radar

August 17: Monty Marshall - A Topic TBD that WILL Blow Your Mind

September 19, 20, or 21: Peter Gold - Precursor to the SDAG Field Trip - The Agua Blanca Fault

Meetings are usually scheduled for the 3rd Wednesday evening of the month. Meeting information on this website is normally updated the second week of the month.

If you have any information, announcements, ads or suggestions for an upcoming newsletter, please submit it to Chris Livesey, (2016 SDAG Secretary). Any news regarding upcoming events that may be of interest to the Association or news of your business can be submitted. The submittal deadline for the next SDAG newsletter is the last Friday of the month.
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