Webinar Schedule

A New Way Of Maximum Magnitude Estimate for Induced Seismicity – Chaos

A New Way Of Maximum Magnitude Estimate for Induced Seismicity – Chaos

Traffic Light Systems (TLS) for induced seismicity by underground injections traditionally rely on magnitude thresholds. The choice of these thresholds is debated and found inappropriate, with most recent 2020 fashion proposing very low thresholds based on empirical observations.

In this session, Dr. Leo Eisner will demonstrate that these observations can be explained as order of statistics and show how this theory can be used for TLS.

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The Value Of SHM To Manage Seismic Emergency

Featuring Professor Maria Pina Limongelli

The management of civil infrastructures in the aftermath of a seismic event is a concern for decision makers, which have to choose quickly among alternative actions with limited knowledge on the actual structural conditions. Structural Health Monitoring (SHM) information can support these decisions.

However, information come with a cost and the relevant benefit must be assessed before the acquisition of the SHM system is decided.

In this session, Professor Maria Pina Limongelli will introduce us to the Value of Information (VoI) analysis, which is a powerful tool to estimate such benefit and to optimize the design of the SHM system for each specific application.

This informative webinar + Q&A presents a number of applications of VoI in the field of civil engineering for exemplary case studies.

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The Importance of Force Balance Accelerometers to Constrain Future and Near Real Time Ground Motion Scenarios

Featuring Dr. Jorge Crempien

Never before have so many strong motion instruments been deployed in the vicinity of active tectonic margins, which has enabled us to understand underlying physical processes of rupture that take place in the event of an earthquake. With the advancement of numerical and empirical techniques to simulate strong ground motion scenarios, with physics-based rupture models, the new objective is to constrain these models with ground motions recorded by force balance accelerometers, by dissecting the underlying physical processes related to the seismic source, path wave propagations, and site effects.

In this session, Dr. Jorge Crempien will show several approaches to invert these data to constrain kinematic rupture models on faults, for both scientific and near real time purposes, such as spatial ground motion intensities and cascading tsunami inundation estimations on coastal areas. He will also demonstrate numerical and empirical approaches aimed at constraining ground motion scenarios for regions with little recorded data.

This informative webinar + Q&A places particular focus on numerical methods to simulate ground motion stemming from crustal earthquakes, and the use of small earthquakes to simulate mega-earthquake ground motions on subduction zones, using the Empirical Green’s Function approach.

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The Effect of Confinement Due to COVID-19 on Seismic Noise in Mexico

Featuring Dr. Xyoli Pérez-Campos

In this session, special guest speaker Dr. Xyoli Pérez-Campos will discuss effects on seismic noise related to COVID-19 lockdowns in Mexico.

Mexican seismic stations witnessed a reduction in noise level as a result of the lockdown strategies to contain COVID-19. The largest drop was observed in Hermosillo, also the city with the fastest noise level recovery, and a quick increase in confirmed COVID-19 cases. Since June 1, 2020, a traffic-light system modulates the re-opening of economic activities for each state, which is reflected in noise levels. Noise reduction has allowed the identification and perception of smaller earthquakes.

This informative webinar + Q&A is a must-see for anyone interested in how other factors can impact seismic observation.

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Review of Recent Applications of Ambient Noise Surface Wave Tomography (ANSWT)

Featuring Dan Hollis

Ambient seismic noise surface wave tomography for subsurface imaging and monitoring was developed in the early 2000s. Application of the method started with crustal studies and has evolved over the past several years to several applications: seismic hazard assessment, mineral exploration and development, Oil/Gas/Energy exploration and development, geotechnical assessment, and geothermal exploration and development.

In this session, special guest speaker, Dan Hollis will present a review of the ANSWT method and review several imaging and monitoring projects performed over the past couple of years.

This informative webinar + Q&A is a must-see!

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Introducing The OmniSensor

Featuring Dr. Tom VanZandt

In this session, special guest speaker Dr. Tom VanZandt will introduce the OmniSensor, a new instrument that integrates the traditional broadband seismometer and strong motion accelerometer into a single posthole-compatible package.

The presentation will discuss the design and construction of the OmniSensor and its cabling. Dr. VanZandt will describe its basic operating parameters and performance, and discuss standard deployment tooling and methods.

This informative webinar + Q&A will provide critical information to engineers, professionals and researchers on the Omnisensor.

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Traceview – The Antelope Waveform Analysis Program

Featuring Trilby Cox

In this session, special guest speaker Trilby Cox will provide an overview of the latest Antelope waveform analysis program, Traceview. Beginning with a brief history of Antelope waveform analysis programs, Trilby will provide an introduction to Traceview with context around development of the new program, and demonstrate the capabilities currently available for use.

This informative webinar + Q&A is a must see for Antelope users, researchers, and professionals interested in cutting-edge analysis tools.

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DAM SAFETY GROUP: One Stop Shop for Dam Safety

Featuring Mr. Yuji Taresawa

The Dam Safety Group (DSG) provides the widest range of geophysical and seismic technologies to address non-invasive investigation, maintenance and monitoring of dams, embankments and levees.

In this session, special guest speaker Mr. Yuji Taresawa will walk us through who DSG is, what DSG offers, and how DSG matters, with special emphasis on how seismic monitoring and geophysical investigation improve dam safety.

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Surface Wave Methods for Seismic Site Characterization

Featuring Dr. Sebastiano Foti 

Surface wave methods gained in the past decades a primary role in many seismic projects. Specifically, they are often used to retrieve a 1D shear wave velocity model or to estimate the VS,30 at sites of strong motion networks. The complexity of the interpretation process and the variety of possible approaches to surface wave analysis make it very hard to set a fixed standard to assure quality and reliability of the results.

In this session, special guest speaker Dr. Sebastiano Foti will introduce us to surface wave analysis and summarize the InterPACIFIC (Intercomparison of Methods for Site Parameter and Velocity Profile Characterization) guidelines published in 2018 and will provide some application examples.

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