AEG 2020 Annual Meeting

Please visit the AEG 2020 Annual Meeting Information page for additional info

MARCH Meeting Cancelled

Next meeting TBD

After much debate and in line with decisions made by several other AEG Chapters and local organizations, the Oregon Board has decided to cancel next week’s meeting.  If you have registered for the meeting already please reach out to one of the board members and we will work through getting you a refund. 

Thanks for your support of the Chapter and we hope to see you at the April meeting.  In the meantime, please practice good hand washing skills and maintain healthy public interactions as much as practical.

Oregon Chapter Board

Tuesday • March 17th 2020 • 6 – 9 PM


Luck Labrador Beer Hall – 1945, NW Quimby St, Portland, OR 97209

6 PM — Social Hour

6:45 PM — Dinner

7:30 PM — Presentation

Dinner pricing is as follows:

$25 – Private Industry • $20 – Public Agency • FREE – Students

Reservations can be made here: RSVP by 12 PM Monday, March 16th

Characterizing Fault Displacement Hazards: Significant Progress and Significant Uncertainties

Featuring: The 2019/2020 AEG/GSA Richard H. Jahns Distinguished Lecturer in Applied Geology: Scott Lindvall

This talk focuses on the different methods and underlying data used to develop probabilistic and deterministic fault displacement estimates and well as our understanding of fault behavior (slip rate, magnitude, and recurrence) and the uncertainties associated with fault behavior and observations of historic fault slip. The presentation will also raise critical questions regarding both methodologies and design criteria used for infrastructure projects in light of these uncertainties

Speaker Bios: Scott Lindvall

Scott Lindvall is a Certified Engineering Geologist in California with 35 years of experience working in the consulting industry performing seismic and geologic hazard analyses, fault investigations, and engineering geology studies for both existing and proposed critical facilities. He is particularly interested in advancing the state of the practice by incorporating recent research on active faults and seismic sources into the evaluation of dams, aqueducts, pipelines, nuclear facilities, and other infrastructure.

Scott received his BS in Geology from Stanford University in 1984 and his MS in Geology from San Diego State University in 1988. Dick Jahns was Scott’s undergraduate advisor at Stanford, which makes this award especially meaningful to him. He has spent the majority of his career working for consulting firms specializing in seismic hazards and engineering geology. He currently manages the Lettis Consultants International southern California office, and prior, worked many years at both William Lettis & Associates, and Lindvall, Richter & Associates.

His interest in geology came at a young age growing up in the Transverse Ranges of southern California. His geologist father, Eric Lindvall, helped instill an appreciation of the outdoors (and therefore geology) and was later instrumental in shaping Scott’s career. His interest in earthquakes was triggered at nine years old in the early morning hours of February 7, 1971 with the M6.6 San Fernando earthquake. Experiencing strong ground shaking from the main shock and several large aftershocks in the epicentral region, while dust was slowly rising from rock falls in the surrounding canyons, left a lasting impression.

Scott has performed detailed mapping of surface ruptures of earthquakes in southern California and Turkey, including the 1986 M6.6 Superstition Hills, 1992 M7.3 Landers, 1999 M7.4 İzmit (Kocaeli), 1999 M7.1 Düzce, and the 1999 M7.1 Hector Mine earthquake ruptures. Scott’s experience in neotectonics, paleoseismology, and geomorphology has enabled him to pursue research projects designed to better quantify the timing of past events, slip rate, surface displacement, and style of deformation on active strike-slip and reverse faults throughout southern California. He has been awarded over a dozen research grants funded by the U.S. Geological Survey National Earthquake Hazards Reduction Program (NEHRP) and the Southern California Earthquake Center (SCEC). Scott has directed geologic evaluations and seismic source characterizations in a variety of tectonic environments ranging from active plate boundaries to stable cratons. He served on the Technical Integration Team for a multi-year study sponsored by the US Nuclear Regulatory Commission, US Department of Energy, and the Electric Power Research Institute to develop the Central and Eastern United States Seismic Source Characterization for Nuclear Facilities, which has served as the regional seismic source model for hazard evaluations of nuclear facilities since its publication in 2012. Scott has also served on the advisory committee of the Earthquake-Induced Landslides Working Group for the California Geological Survey’s (CGS) Seismic Hazards Mapping Program and, more recently, the CGS Special Publication 42 Advisory Panel to update the regulatory guidance on assessing fault rupture hazards in California.

Message from the Chair

Well yet another month has passed and another great talk has been given. Thanks to all those who attended the February meeting. It was a good turnout for a fun topic. Tim Shevlin shared his research in rockfall attenuators and introduced us to GeoBrugg’s new design tool. It is always fun seeing rock rolling videos and mitigation measures in action. Thanks to Tim and GeoBrugg for sponsoring the beverages as well. It was refreshing!

March brings the Jahns Distinguished Lecturer Scott Lindvall. Scott is especially grateful to be honored as Jahns Lecturer since Dick Jahns was his undergraduate advisor. Currently Scott manages the Lettis Consultants International in southern California office. He has a long lasting interest in seismology stemming from

firsthand experience with the M6.6 San Fernando earthquake. He will be presenting on Characterizing Fault Displacement Hazards: Significant Progress and Significant Uncertainties. Please come out to show our support for the Jahns Lecturer and possibly get some first hand stories of Dr. Jahns. As a reminder the meeting will be held at the Lucky Labrador Beer Hall on 1945 NW Quimby. New venue, same great crowd and interactions.

Once again, please consider registering for the 2020 Annual Meeting. Information on the meeting can be found at

Looking forward to seeing you at the Lucky Lab!

Ben George, P.E., R.G., C.E.G.
Oregon AEG Chapter Chair

Portland 2020 Annual Meeting Update

Abstracts and Registration is now open! Head to to sign up!

Furthermore, consider nominating an AEG volunteer for the Doug Piteau Award. This award is for an outstanding volunteer under the age of 35. The level of volunteer activity can be at either the Chapter or Association level. This award was not given last year, because we received no nominations. Please consider nominating this year, so that we can acknowledge and show appreciation to our younger members in AEG.

Nominations are due March 1st to

The case of miss matched numbers. For tourists the dates of the Missoula floods and the Columbia River Basalts (CRB) are confused due to the relative similarities of the numbers. In relative age from the present which is correct.

Student AWARDS

See the Student Awards page for more information!

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