Webinars

Webinars

EERI’s professional development webinars covers a broad range of topics for the community of earthquake risk reduction professionals. You will hear about the latest impacts and lessons from recent earthquakes, learn about emerging research from Earthquake Spectra, and hear from leading experts on complex technical topics. Recordings from previous webinars can be found in the Digital Library.

Webinar: Preliminary Geological and Structural Reconnaissance Observations from the August 9, 2020 Sparta, NC Earthquake

Sparta NC social media

Wednesday, September 30 at 11 am PT / 2 pm ET  
Cost: Free for EERI members and non-members (PDH hours included upon request)

On August 9, 2020 at 8:07AM, the largest recorded earthquake to strike North Carolina occurred near Sparta. The 5.1 magnitude earthquake (MMI 6) was preceded in the days before by several small foreshocks felt by local residents and followed to date by ~100 aftershocks. In this webinar, a multidisciplinary team from NC State, UNC-Chapel Hill, USGS, and NC Geological Survey will discuss their observations including ground shaking characterization, geological features, and structural damage assessment.

The earthquake caused ground deformation and surface rupture, which is expressed by several fissures and small scarps, disposed with en-echelon patterns roughly striking 100° along a narrow deformation zone that is traceable for 2–3 km. The rupture has a maximum vertical displacement of ~20 cm, with an average vertical displacement of 8–10 cm with a reverse motion and/or folding/flexure. Preliminary InSAR data shows consistency with the focal mechanism, suggesting the existence of a NW-SE structure and relative uplift of the hanging wall and subsidence of the footwall. The surface rupture seems to be associated with pre-existent discontinuities, which can be reactivated under favorable conditions. Questions arise related with the seismogenic source and secondary structures that may have accommodated the deformation closer to the surface.

This event caused damage to more than 600 houses and the distribution of damage and shaking reports (“Did you feel it?”, USGS) suggests a stronger shaking in the hanging wall, as expected in a reverse motion. Structural damage was sufficient to condemn many houses, with substantial damage to some unreinforced masonry (especially chimneys). Based upon calculations of rocking response, peak ground accelerations of at least 0.2g likely occurred, which is compatible with USGS estimates. In addition, non-trivial damage to building contents in the town center was observed.

SPEAKERS

Dr. Mervyn J. Kowalsky is the Christopher W. Clark Distinguished Professor of Structural Engineering at NC State University in Raleigh, NC. He earned his BS, MS and PhD degrees at the University of California, San Diego.His research interests are in the development of seismic design and analysis methods for structural systems, with a special interest in Direct Displacement-Based seismic design. His work includes large scale structural testing and non-linear modelling aimed at understanding the mechanisms that characterize the seismic behavior of structures.

Ariadne L. Palma Parra began her university studies at Universidad de La Salle in Bogota, Colombia and continued to earn her Bachelor’s of Science in Civil Engineering at NC State University in 2017 and her Masters of Science in Structural Engineering in Fall 2019. As part of her doctoral studies at NC State, she is currently conducting computational work on response spectra definitions used in seismic design and experimental research on the evaluation of steel bridge structures. Her primary research interests are in performance based seismic engineering and large scale testing of structures.

Dr. Paula M. Figueiredo is a Post-Doctoral Researcher at NC State University in Raleigh, NC. She earned her BS, MSc and PhD in Geology at the University of Lisbon, Portugal, where she researched the Neotectonics and Active Tectonics of SW Portugal. Her research focus on active tectonics, paleoseismology, tectonic geomorphology, Quaternary geochronology and surfaces processes. In particular, she applies terrestrial cosmogenic nuclide and optically stimulated luminescence dating to obtain timings and rates of deformation. She has been conducting research at several locations in southern California and Nevada, Baja California, Portugal and other locations, supported by NSF, SCEC and NEHRP. She has published several papers related with active tectonics, paleoseismology in plate boundary and intra-plate settings.

Dr. Arthur J. Merschat is a research geologist with the U.S. Geological Survey and adjunct research professor at Appalachian State University in Boone, NC. He is a co-project chief of the USGS Piedmont and Blue Ridge Project. Arthur's primary research goal is to create accurate, detailed geologic maps, with a special interest in complexly deformed crystalline rocks. He has spent the past 20 years studying the structure and tectonics of the Appalachians and has worked on geologic mapping projects in the southern Appalachians (Blue Ridge and Inner Piedmont), New England, and Adirondacks. He has published several papers, geologic maps, and field trip guidebooks on Appalachian geology with an emphasis on the geology of the Blue Ridge and Inner Piedmont.

Dr. Lewis A. Owen is Professor and Head of the Department of Marine, Earth, and Atmospheric Sciences at NC State University in Raleigh, N.C. He received his B.Sc. in Geology, from Imperial College, University of London, and Ph.D. from the University of Leicester, U.K. He has held faculty positions at the University of Cincinnati, the Hong Kong Baptist University, Royal Holloway – University of London, and the University of California – Riverside. Dr. Owen’s research focuses on the Quaternary geology and geomorphology of tectonically active mountain belts and their forelands, particularly in the Himalayan-Tibetan orogen and the Cordilleras of North and South America. He has also undertaken research in other tectonically active regions, including the Red Sea margin in Yemen and the Atlas and Anti-Atlas Mountains of Morocco.

Dr. Kevin G. Stewart is an Associate Professor of Geological Sciences at the University of North Carolina at Chapel Hill. He earned his BS degree from the University of Michigan and his Ph.D. from the University of California, Berkeley. His research is focused on the structural geology and tectonic history of mountain belts including the southern Appalachians, Apennines and Rocky Mountains. His work has been supported by the National Science Foundation, the US Geological Survey, and several Foundations.

Richard Wooten is the Senior Geologist for Geohazards and Engineering Geology at the North Carolina Geological Survey. He earned his B.S. and M.S. degrees in Geology at the University of Georgia. His work includes landslide investigations and applied geotechnical geology with the USDA-Forest Service on the Gifford Pinchot National Forest in Washington State. His work with the North Carolina Geological Survey includes geologic mapping in the Piedmont and Blue Ridge, and research on landslides, landslide hazard mapping and modeling. He has a special interest in the relationships of ductile and brittle faulting and other bedrock structures with geomorphology, and landslide processes and hazards.

Webinar: Lifeline Infrastructure System Resilience – Exploring What Is It and How We Can Implement

Sep 2020 Lifeline Webinar

 

Thursday, September 10 at 11 am PT / 2 pm ET  
Cost: Free for EERI members | $50 for non-members (PDH hours included upon request)

Lifeline infrastructure system resilience — prior to and following disruptions due to natural or technological hazards — is intimately linked to and supports community resilience. Lifelines are interdependent socio-technical systems vital in the day-to-day operations of our communities and their basic services are essential for community recovery after earthquakes and other extreme events. Lifelines include electric power, gas and liquid fuel, water and wastewater, telecommunication, and multi-modal transportation systems.

In this webinar, you will gain an understanding of key concepts needed for lifeline systems to be resilient to earthquakes and other hazards. You’ll also gain insight into the needed future work to fully operationalize lifeline system resilience using functionality, operability, and functional recovery measurements.

Functionality and operability are continuous expressions useful for measuring lifeline system resilience. These expressions are explored along with the basic lifeline services and their recoveries needed to ensure communities can achieve their resilience objectives. The concept of functional recovery is being further developed by FEMA and NIST as part of the 2018 National Earthquake Hazards Reduction Program (NEHRP) reauthorization and is closely related to operability.


Speaker

Craig A. Davis, Ph.D., PE, GE is a professional consultant on geotechnical, earthquake, and lifeline infrastructure system resilience engineering. In his three-decade long career at the Los Angeles Department of Water and Power, Water System (LADWP), Davis worked as the Departmental Chief Resilience Officer, Resilience Program Manager, Seismic Manager, Geotechnical Engineering Manager, and Trunk Line Design Manager.

There he developed a comprehensive L.A. Water System resilience program and was involved in creating policy for improving infrastructure systems to threats and hazards. He also investigated and evaluated numerous dams and tunnels, managed several multimillion dollar projects, and implemented unique and innovative designs while aiding the development of new technologies and their applications.

He has published more than 140 technical papers and organized international workshops and symposiums on geotechnical engineering and lifeline system resilience. He has served on many national and international professional committees, including the Building Seismic Safety Council, the National Earthquake Hazards Reduction Program Advisory Committee on Earthquake Hazards Reduction, ASCE Infrastructure Resilience Division, and the International Society of Lifeline and Infrastructure Earthquake Engineering.

Davis has been honored with many awards, including the ASCE 2016 Le Val Lund Award for Practicing Lifeline Risk Reduction and the 2020 Charles Martin Duke Lifeline Earthquake Engineering Award. He received a B.S. from the California Polytechnic State University in San Luis Obispo and an M.S. and Ph.D from the University of Southern California, all in civil engineering.

Chapters: EERISC: Perspectives on Building an Earthquake Resilient Southern California

Wednesday, 2 December 2020
Cost: Free

This webinar focused on the emerging concept of functional recovery as a key element of resilience-based design in Southern California communities. Designing new and improving existing buildings and infrastructure for limited downtime (or a quick functional recovery) is a necessary tool for achieving community-wide earthquake resilience. The webinar began with an abbreviated presentation by David Bonowitz of his 2020 EERI Distinguished Lecture, “Functional Recovery: What it Means to Design for Community Resilience”. Bonowitz was then be joined by local experts Craig Davis, Susan Dowty, Henry Burton, and Christine Goulet, who presented and discussed aspects of functional recovery and resilience in Southern California, including references to the City of LA’s “Resilient Los Angeles” report.

Chapters: EERINC: Earthquakes in Pandemics: Experiences from Earthquakes in Europe (2/3)

Thursday, 19 November 2020
Cost: Free

This webinar, hosted by the EERI Northern California regional chapter, focused on how the current COVID-19 pandemic can affect the earthquake community. This webinar featured a panel discussion on the impacts of earthquakes on infection rates and actions immediately following earthquakes in Europe (Portugal and Croatia). Attention was placed on lessons learned that may be important for the United States. Two panelists gave a brief summary of their recent article in Earthquake Spectra titled, “Potential Impact of Earthquakes during the 2020 COVID-19 Pandemic” and two additional panelists were in Zagreb during the March 2020 earthquake (M5.5) and provided eye-witness accounts.

Chapters: EERIWA: Advocating for Earthquake Safety in Washington State

Wednesday, 18 November 2020
Cost: Free

This webinar, hosted by the EERI Washington State regional chapter, covered the history of seismic resilience and resilience planning at the state and local levels, reviewed tools and guidance that EERI has recently developed for Citizen Advocacy, and discussed what the membership can do today for a safer Washington State. Building on efforts of the past that planned for a Resilient Washington State, the webinar encouraged new and existing members of the Washington State regional chapter to engage with representatives and advocate for seismic and tsunami safety.

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Earthquake Engineering Research Institute
499 14th Street, Suite 220
Oakland, CA 94612
Phone: 510-451-0905
Fax: 510-451-5411
Email: eeri@eeri.org

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