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AEG Southern California Chapter
January 2020 Meeting

***Wednesday, January 15, 2020***

Happy Holidays! Our first meeting of 2020 will be Wednesday, January 15 at Victorio's Ristorante in North Hollywood. Shant Minas, P.G., C.E.G. of Applied Earth Sciences will be presenting on a fault rupture hazard study in the Santa Monica Fault Zone in Century City.

Shant is a former Chairperson of the Southern California Chapter of AEG and a licensed engineering geologist in California. He is the principal engineering geologist managing director of Applied Earth Sciences in Glendale, CA. After pursuing an education in economics and financial mathematics, Shant earned a MS in Geology in 2008. Shant oversees a variety of projects including geotechnical investigations, fault rupture hazard studies, environmental investigations, methane testing and mitigation design, percolations testing, grading inspections, and more. As past AEG Chair of the Southern California Chapter, Shant organized several field trips to explore the Santa Monica and Malibu Fault Zones. Shant is excited to share the following presentation which he initially gave at the 2019 AEG National Meeting in Asheville, North Carolina.

Topic: "A Multi-Phase Fault Rupture Hazard Study in Century City, Los Angeles, California"

Speakers: Shant Minas, Applied Earth Sciences (
Thomas Rockwell (

Location: Victorio's Ristorante
10901 Victory Blvd
North Hollywood, CA 91606

Date/Time: Wednesday, January 15, 2020
5:45pm - Social Hour
6:45pm - Dinner
7:45pm - Program

Cost: $40 per person with reservations in advance for AEG members,
$45 without reservations (at the door) and non-members,
$25 for students with a valid student ID.

Reservations: Please email Topher Amador-French at: or call (503) 544-3709
Please make reservations prior to
12:00 noon, Monday, January 13.

Determining the locations of the active branches of the Santa Monica fault in the Century City area of Los Angeles has been the subject of significant investigation and contention among several consultants and stakeholders. Starting in 2011, investigations were commissioned by The Los Angeles County Metropolitan Transportation Authority for the siting of the Purple Line subway station in the Century City area, with an objective to avoid siting the station near or on an active branch of the fault zone. Subsequently, numerous other agencies commissioned separate studies conducted by other consultants which often disputed the findings made by Metro consultants regarding the postulated locations of the active branches of the fault zone. In 2018, Applied Earth Sciences was retained by a private landowner to conduct a site-specific fault rupture hazard study for a single parcel in the Century City area, south of Santa Monica Boulevard, which incidentally was situated directly along strike from where previous investigators had found faults in the area using CPT and core boring methods. Our investigation involved multiple phases of exploration, including continuous-core borings and cone-penetrometer soundings, large-diameter borings, and a trench across where prior phases of exploration had confirmed the location of several faults. The trench excavation allowed direct observation of the faults that had previously been mapped by AES and other workers. This project, therefore, presented a rare and fortunate opportunity to directly observe faults in the Santa Monica fault zone in-situ using the trench exploration method. Fortunately for the client, the faults crossing through the subject property were found to be capped by unruptured Pleistocene soil horizons, confirming that the active strand of this fault zone is located north of the subject study area, likely under Santa Monica Boulevard based on other CPT and core data.