WE ARE EXCITED TO ANNOUNCE THE ANNUAL JOINT MEETING WITH THE LOS ANGELES BASIN GEOLOGICAL SOCIETY!

Please reserve your spot for the upcoming joint luncheon with the Los Angeles Basin Geological Society on Thursday, January 23, 2020 at The Grand in Long Beach.

• Thursday, January 23, 2019

• 11:30 AM - 1:00 PM

COST:

$30.00 with reservation
$40.00 without reservation
$25.00 Retired
$10.00 Student

SPEAKER:    Eric Campbell, President, LA Seismic, LLC
Dan Hollis, CEO, Sisprobe SAS
Robert W. Clayton, Caltech

TOPIC:   A Seismic Hazard Survey of the Los Angeles Basin

ABSTRACT - To better understand and model strong earthquake ground motion in the Los Angeles Basin requires better and more accurate knowledge of earthquake sources, basin structure, and basin and near surface velocities.  Current knowledge of these three points has been compiled over time from many different sources where there is data and interpolated or extrapolated in areas where data does not exist.  A comprehensive and uniform survey that addresses these three points would greatly improve identification of areas of potential high ground motion, provide more detailed after-event shaking data for first responders, and be used to improve the resiliency of critical infrastructure.

 We are preparing for such a comprehensive and uniform seismic hazard survey of the Los Angeles Basin.  This survey will sample the basin with a nominal density of 10 seismic sensors per square kilometer which will provide sufficient resolution for determining the basin structure and the 3D velocity variations. The survey will consist of about 18,000 receiver positions that will be occupied by a rolling set of 5000 sensors, each occupying a given position for 30 days of passive recording. It will take 4 months for this array to traverse the basin.  There will be an additional fixed array of 200 three-component nodes that will record for the entire duration of the survey. The current plan is to supplement the passive seismic data with a limited number of deep shot holes (50m +/-) to obtain 100% or greater CMP-fold reflection data.

 Resulting data products for the survey will be Vs and Vp velocity models from surface to Moho, mapping of micro-seismicity events down to about M-1.5, a model of the crust from surface to Moho using receiver functions, and a seismic reflection image of the sedimentary basin using zero-offset autocorrelation and active source seismic CMP methods.  This data will be used by researchers to model a variety of earthquake scenarios to develop produce an updated seismic hazard map of the L.A. Basin.  Raw data and processed results will be made open source and available to the public.

RESERVATIONS: Please make your reservations and save your seat here. — RESERVATIONS

Reservations must be made by 10:00 am Tuesday morning to receive the discount price above.

- Walk-ins are always welcome.

PLACE: The Grand Long Beach located at 4101 East Willow Street, Long Beach, CA. Direct number - 562-426-0555

Take Lakewood Boulevard south from the San Diego Freeway (405), turn west onto Willow Street and turn right onto Grand Avenue at the sign for the Center.  Park free in the garage structure.

 Typical Meeting Agenda:

                    Lunch Served:         11:30 AM to 12:00 PM          
                    Announcements:      11:50 AM to 12:15 PM
                    Guest Speaker:     12:15 PM to 12:45 PM
                    Questions/Close:    12:45 PM to 1:00 PM

For more information please visit the Los Angeles Basin Geological Society website at www.labgs.net.
Please click here for the current LABGS Newsletter!

SPEAKER BIO: Eric Campbell, President, LA Seismic, LLC

Eric Campbell began his seismic mapping career in 1974 in Alaska, working on a summer job as a shooter on a Petty Ray Geophysical Crew on a project in the Aleutian Islands that was staged in Cold Bay Alaska.   He worked from 1980 to 1986 with Golden Geophysical (now Fairfield), using the Geo-systems Sine Bit 1024 Channel System. This system enabled the first true 3D seismic surveys to be completed. At that time, Dan Hollis worked at Geosystems and was a participant in aiding these surveys.  Eric went on to work in China and again in Alaska for Geosystems.  While working in the LA Basin in seismic mapping for the last 10 years, Eric has been the manager of projects that have placed nodes in over 30,000 locations and have vibrated over 15,000 points.