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

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

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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Time: June 2, 2021 9:00 AM Pacific Time (US and Canada)

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

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

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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Time: May 5, 2021 9:00 AM Pacific Time (US and Canada)

Traceview – The Antelope Waveform Analysis Program

Traceview – The Antelope Waveform Analysis Program

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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Time: April 7, 2021 9:00 AM Pacific Time (US and Canada)

Surface Wave Methods for Seismic Site Characterization

Surface Wave Methods for Seismic Site Characterization

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 V_S,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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Time: March 24, 2021 9:00 AM Pacific Time (US and Canada)

Earth’s Rock ‘n’ Roll – Measuring Rotational Motions in Seismology

Earth’s Rock ‘n’ Roll – Measuring Rotational Motions in Seismology

We all know that seismology is a science based on measuring ground motions using seismometers. This measures three components of translational motions. But is that all the ground does? No, there are other motion components.

In this session, special guest speaker Professor Heiner Igel will discuss new developments in seismic instrumentation – in particular rotation sensing – with applications ranging from earthquake physics, ocean bottom seismology, seismic tomography, volcanology, earthquake engineering to planetary seismology. The key to these new applications is optical technology making use of laser light and relativistic effects getting hold of the wavefield gradient related information.

This informative webinar + Q&A is a must see, focusing on concepts and results from innovative pilot projects.

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Time: March 10, 2021 9:00 AM Pacific Time (US and Canada)