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SDAG Monthly Meeting - VIRTUAL
Wednesday - April 21, 2021

Location: Your house, in front of your computer

6:30pm - 7:00pm get logged in, social hour via web platform
7:00pm - Meeting begins

Join Zoom meeting from PC, Mac, Linux, iOS or Android:
Meeting ID: 857 9818 4239
Passcode: 461844

happy hour

Menu: What's in your fridge?

Cost: Free - BYO food and drinks.
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.

7:00pm -

"REPLAY - EERI SD Chapter Webinar Series

Speakers: 1) Prof. Thomas Rockwell (San Diego State University)
2) Timothy Dawson (California Geological Survey)
3) Michael DeFrisco (California Geological Survey)
4) Discussion Q&A. Moderator: Dr. Jorge Meneses

On February 18, 2021, the California Geological Survey (CGS) released preliminary review maps of proposed new and revised Alquist-Priolo Earthquake Fault Zones to the City and County of San Diego (click here).

The City of San Diego has also posted the announcement here.

The February 18, 2021 release date begins a 90-day public comment period to provide technical review comments on the proposed Earthquake Fault Zone maps. Comments should be sent to the State Mining and Geology Board before May 19th, 2021, and should be addressed to:

Jeffrey Schmidt, Executive Officer
State Mining and Geology Board
801 K Street, MS 20-15
Sacramento, CA 95814-3528
Phone: (916) 322-1082

The State Mining and Geology Board (SMGB) will hold a public hearing near the end of the 90-day review period. For more information on the date and location of the public hearing, contact the SMGB by visiting

The EERI San Diego Chapter organized this webinar to provide background and further information on these new and revised maps.

Jorge F. Meneses, Ph.D.
EERI - Board of Directors - Director Term: 2019 – 2022
Jorge F. Meneses, Ph.D., P.E., G.E., D.GE, F.ASCE, Principal Geotechnical Engineer, RMA Group, Inc., has more than 30 years of consultancy, project management, research, and teaching experience, in both private industry and research institutions in the field of geotechnical and earthquake engineering. He has been involved in numerous projects serving as a technical lead in geotechnical earthquake engineering and foundation engineering across the country and various markets including water, nuclear, transportation, high rise buildings, energy, schools, hospitals, commercial and industrial.

Dr. Meneses frequently acts as a peer reviewer for technical conferences and technical journal publications, is a guest speaker for domestic and international conferences, and has published more than 60 technical publications. He is currently a part-time faculty member in the graduate school of San Diego State University. He is the President and Founder of the Earthquake Engineering Research Institute (EERI) San Diego Chapter, California Seismic Safety Commissioner, Honorary Chair of the ASCE Geo-Institute San Diego Chapter, Member of the ASCE 7-16 (Minimum Design Loads for Buildings and Other Structures) and ASCE 1 (Geotechnical Analysis, Design, Construction, Inspection and Monitoring of Nuclear Safety-Related Structures) Committees, member of the Industry Advisory Board, Department of Structural Engineering (University of California San Diego), member of the Academy of Geo-Professionals, and a Fellow of the American Society of Civil Engineers (ASCE).

Thomas Rockwell, Ph.D. Professor of Geology, SDSU
Dr. Thomas Rockwell is a nationally and internationally renowned paleoseismologist and structural geologist who has published over 120 articles in major international journals, coauthored a number of book chapters, published 40 papers in conference proceedings and guidebooks, and coauthored over 300 papers presented at professional meetings. Having served as Geology Group Leader for the Southern California Earthquake Center for many years, he is an expert on the tectonics and earthquake hazards of southern California and Baja California, has conducted extensive trenching programs to date earthquakes on faults in the western U.S., South and Central America, the Middle East and Asia, and routinely uses soil stratigraphy and geomorphology combined with various radiometric dating techniques to assess rates of fault activity, determine recency of faulting, and date past earthquakes. In the past decade, he has initiated a number of ground-breaking studies on fault zone architecture and processes in southern California with PhD students Ory Dor and Neta Wechsler, as well as with many MS-level students. New work on fault zone damage, pulverization, and fluid processes has resulted in over a dozen well-cited papers on this topic since 2006. His other research focuses on understanding earthquake occurrence in time and space. Current projects include the characterization of fault systems behavior by understanding patterns of past recurrence of large earthquakes on faults in southern California, northern Mexico, Panama, Argentina, Portugal, Spain, Turkey, India, and Israel. This work includes resolving information on slip per event, as it relates to understanding the controls on segmentation and rupture termination. Current work on fault zone processes initially focused on damage characteristics, but has shifted to the role of fluids nd the processes that produce the damage. He has also worked extensively on the affects of tectonism on the landscape, and using geomorphology to constrain rates and timing of tectonic events. Included in this latter aspect is detailed mapping and dating of marine terraces along the west coast of North America and assessment of paleosea level during the late Quaternary.

Timothy Dawson
California Geological Survey
Senior Engineering Geologist, Fault Zonation Program
Expertise: Paleoseismology, neotectonics, earthquake geology

Upcoming SDAG meetings - 2021

May 19: - TBD

June: - TBD

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.

Recordings of past meetings

4/21/2021: EERI Speakers: 1) Prof. Thomas Rockwell (San Diego State University), 2) Timothy Dawson (California Geological Survey), 3) Michael DeFrisco (California Geological Survey), 4) Discussion Q&A. Moderator: Dr. Jorge Meneses

3/17/2021: Barry Keller "Sediment Transport in the San Francisco Bay Estuarine System"
Passcode: 5+Y5m?h@

2/17/2021: Dr. Norrie Robbins "Origin of Our Redbeds Pigmentation by Chembiotic Oxidation of Detrital Magnetite in Red Brown Pleistocene Terrace Sandstones, San Diego, CA."
Passcode: ^DK2UW0=

1/20/2021: W. Paul Burgess, M.S., P.G. California Geological Survey "Shallow landslide and debris flow activity in San Diego County, early April, 2020"
Note: ZOOM speaker's presentation begins at time 1:44:00.

12/16/2020: Dr. Tom Demere of the SDNHM "Suprise Talk!!."
Passcode: b.Wh7f&&
Note: ZOOM speaker's presentation begins at time 1:10:00.

If you have any information, announcements, ads or suggestions for an upcoming newsletter, please submit it to 2021 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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