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Multiple AGU Session Announcements

Date: 07/21/2022

Dear SCEC Community,

AGU Session announcements are heating up! Below are an assortment we've received from the community, including:

  • AGU Session S001: Advancements in imaging earthquake source processes
  • AGU Session S020: Recent Advances in Seismoacoustic Methods for Explosion Monitoring
  • AGU Session NH008: Earthquake Scenario Development, Deployment, and Uses
  • AGU Session T022: What is the influence of fault maturity in earthquakes and fault systems over coseismic to geologic timescales?
  • AGU Session T015: Structure, Mechanics, and Hazards of Geometrically Complex Fault Systems
  • AGU Session G008: Plate Motion, Continental Deformation, and Interseismic Strain Accumulation
  • AGU session on the role of fault healing in the earthquake cycle

 

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On behalf of Ryo Okuwaki, University of Tsukuba

AGU Session S001: Advancements in imaging earthquake source processes

Dear Colleagues,

Are you working on earthquake sources and going to attend the 2022 AGU Fall meeting? We would like to invite you to submit contributions to our session: Advancements in imaging earthquake source processes (S001 in Seismology). The AGU Fall Meeting will take place in Chicago, Illinois and online from December 12-16, 2022. Abstracts are due August 3rd.

Session link: https://agu.confex.com/agu/fm22/prelim.cgi/Session/157826

S001: Advancements in imaging earthquake source processes

Session Description: 
Understanding of earthquake source physics and related hazards has been greatly enhanced by advancements in imaging earthquake ruptures, including the utilization of multi-geophysical observations, the implementation of dense array techniques, and the development of rupture inversion schemes. Promising future research directions include improving quantification of various observational uncertainties, robustly characterizing different source complexities, and isolating effects due to the Earth’s heterogeneous structures.

This session welcomes contributions on the imaging of earthquake source processes, including developments in source inversion methods and observations of recent significant earthquakes and sequences. In particular, we welcome contributions aiming to advance uncertainty quantification of inferred source models, and to assess fault and crustal structure impacts on the source models and associated physical interpretations. We solicit multidisciplinary studies that synergize observations from seismic, geodetic, and tsunami data, laboratory experiments, and earthquake geology.

Invited speakers:
Federica Paglialunga, EPFL
Kurama Okubo, NIED
 
Conveners:
Zhe Jia, UCSD IGPP
Théa Ragon, Caltech
Ryo Okuwaki, University of Tsukuba
Elisa Tinti, Università La Sapienza

 

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On behalf of Arben Pitarka, LLNL

AGU Session S020: Recent Advances in Seismoacoustic Methods for Explosion Monitoring

Dear Colleagues,

Please consider submitting an abstract to the AGU Session S020 - Recent Advances in Seismoacoustic Methods for Explosion Monitoring

Seismoacoustic techniques are critical for studying explosive sources and the associated seismic and acoustic wave propagation. This session focuses on methods relevant to monitoring technologies such as seismoacoustic signal generation, signal propagation though the solid Earth, oceans, atmosphere and space, as well as improved signal analysis techniques. We invite contributions focused on methods for the detection, location, discrimination, and yield estimation of seismoacoustic events of interest drawing on advances in source physics models and signal processing.  We welcome presentations on physics-based seismic, infrasound and overpressure modeling techniques which advance our understanding of the generation and propagation of seismic and acoustic signals, models of wave-coupling between the solid earth and atmosphere, and near-field fluid dynamics modeling. We seek contributions to improvement of detection and source discrimination techniques by leveraging multiple signal features and combining phenomenologies through data fusion, machine learning, and integration of advanced signal processing techniques into data processing pipelines.

Conveners:

  • Arben Pitarka, Lawrence Livermore National Laboratory (pitarka1@llnl.gov)
  • Keith Koper, University of Utah (koper@seis.utah.edu)
  • Keehoon Kim, Lawrence Livermore National Laboratory (kim84@llnl.gov)
  • Fransiska Dannemann Dugick, Sandia National Laboratories (fkdanne@sandia.gov)

 

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On behalf of Elizabeth Sherrill, Indiana University

AGU Session NH008: Earthquake Scenario Development, Deployment, and Uses

We invite contributions to our AGU 2022 Session, NH008 – Earthquake Scenario Development, Deployment, and Uses. We hope to have a multidisciplinary session on natural hazard scenarios that includes geoscientists, social scientists, engineers, and urban planners. 

The AGU Fall Meeting is in Chicago, Illinois and online from December 12-16, 2022. The abstract deadline is August 3, 2022 at 11:59 EDT. 

Session Description 

NH008 – Earthquake Scenario Development, Deployment, and Uses

https://agu.confex.com/agu/fm22/prelim.cgi/Session/160922 

The development of realistic and useful earthquake scenarios takes many forms because they are needed for a variety of uses and users. Seismologists deploy complex faulting and 3D simulations to make ground motions as realistic as possible; engineers are engaged to evaluate structural and infrastructure responses are accurately depicted; and social scientists and urban planners ensure societal impacts and equitable recovery concerns are considered. Although they are important, the user interface and the useability earthquake information product injects are considered less frequently, and the consequences of concern from the users’ perspective are not fully appreciated. This session aims to gather those concerned with the accuracy of scientific and engineering aspects of earthquake and other natural hazard scenarios as well as those on the planning, delivery, and science communication sides of earthquake scenario development. 

Warmly, 

Yolanda Lin, University of New Mexico 
Janise Rodgers, GeoHazards International 
David Wald, USGS National Earthquake Information Center 
Elizabeth Sherrill, Indiana University

 

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On behalf of Alba Mar Rodriguez Padilla, UC Davis

AGU Session T022: What is the influence of fault maturity in earthquakes and fault systems over coseismic to geologic timescales?

Dear Colleagues, 

We would like to draw your attention to our AGU session on the influence of fault maturity on earthquake and fault mechanics. We seek contributions towards advancing the quantitative understanding of fault maturity from field observations, numerical models, analog experiments, and laboratory studies.

Description: 

Fault maturity is often invoked as an explanation for different features of the faulting process in geomechanics, seismology, and geodesy, including the distribution of slip from depth to the surface, rupture propagation and arrest, the ratio of on to off-fault deformation, and the energetics and stress release during rupture. Field studies have shown changes in the degree of segmentation and complexity on the surface trace of a fault. Analog experiments provide insights into the kinematics of fault reorganization with maturity. Laboratory experiments show the evolution of fault surfaces with accumulated slip. Seismological observables shed light on the sensitivity of source parameters to structural maturity of a fault zone. Given the differences in methodologies, as well as space and time scales considered by these methodologies, indicators of fault maturity and associated processes across fault types present a challenge to holistically define fault maturity. As a result, questions related to fault maturity remain open-ended, including understanding how fault evolution influences the dynamic rupture process, fault zone complexity and rheology evolve with fault maturity, and strain partitioning changes through time.

In this session, we welcome recent advances in the quantitative understanding of fault maturity from field observations, numerical models, analog experiments, and laboratory studies. We are particularly interested in work that bridges observations from various methods and studies spanning multiple spatial and temporal scales, and studies linking fault maturity to seismic hazard.

Please consider submitting an abstract: https://tinyurl.com/faultmaturity 

Conveners:

Alba M. Rodriguez Padilla (UC Davis)
Huiyun Guo (UC Santa Cruz) 
Michele Cooke (UMass Amherst) 
Alex Hatem (USGS)

 

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On behalf of Alba Mar Rodriguez Padilla, UC Davis

AGU Session T015: Structure, Mechanics, and Hazards of Geometrically Complex Fault Systems

Dear Colleagues,

Please consider submitting an abstract to our AGU session on multi-fault systems:

Across many tectonic settings, major active fault systems commonly consist of multiple intersecting or neighboring faults. High-resolution observations from recent large earthquakes show that these events often rupture multiple fault segments and generate significant off-fault damage. Over a wide range of timescales, details of the mechanical interactions between segments in complex fault systems remain challenging to untangle. Nonetheless, these interactions appear to influence the seismic and tsunami hazards resulting from complex earthquake ruptures. This session will focus on new observations and models that illuminate how complex fault systems form and deform over geologic to coseismic timescales, and how complex faulting affects natural hazards for nearby communities. Submissions are encouraged from a broad range of disciplines including geology, geomorphology, seismology, geodesy, rock mechanics, and geodynamics, among others.

Conveners:

James Biemiller
Roland Burgmann
Alice-Agnes Gabriel
Alba M Rodriguez Padilla

 

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On behalf of Jeffrey Freymueller, Michigan State

AGU Session G008: Plate Motion, Continental Deformation, and Interseismic Strain Accumulation

We invite submissions to our AGU session, Plate Motion, Continental Deformation, and Interseismic Strain Accumulation. This session is always stimulating and exciting, and we expect the same this coming year! Please submit your abstract and present your work.

Plate Motion, Continental Deformation, and Interseismic Strain Accumulation

https://agu.confex.com/agu/fm22/prelim.cgi/Session/156459

We seek studies examining the take up of plate motion in deforming zones and the buildup and release of elastic strain along major faults and in subduction zones using space geodetic measurements, geologic observations, and geophysical data such as seismicity, marine magnetic anomalies, and transform fault azimuths. How can GPS and InSAR be integrated to determine deformation in plate boundary zones?  To what extent can observed elastic strain buildup and past earthquakes be used to infer the likelihood of future earthquakes?  Are fault slip rates from paleoseismology identical to those from geodetic data?  What fraction of plate motion is taken up by fault slip during earthquakes, and what fraction becomes part of distributed deformation off the major faults?  How fast are mountains currently rising?  To what degree do postseismic transients alter the nearly constant velocity of the plates, and how can postseismic transients influence the definition of Earth's reference frame?

Conveners:

  • Donald F Argus, NASA Jet Propulsion Laboratory
  • Jeffrey Todd Freymueller, Michigan State University
  • D. Sarah Stamps, Virginia Polytechnic Institute and State University
  • Rui Manuel Silva Fernandes, University of Beira Interior

 

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On behalf of Alexis Ault, Utah State University

AGU session on the role of fault healing in the earthquake cycle

Dear colleagues,

Please consider submitting an abstract to our AGU session focused on the role of fault healing in the seismic cycle: T008. Frictional, geological, and geophysical signatures of fault healing: Mechanisms and implications for deformation during the earthquake cycle. Abstracts are due on 3 August 2022.

Session description:

Fault healing or restrengthening is a necessary component of the seismic cycle. Parameters such as stress, temperature, fluids, fluid pressures, lithology, and fault maturity influence the magnitude and underlying mechanisms causing faults to restrengthen. Probing links between interseismic healing and fault slip modes is key to a better physical understanding of earthquake mechanics. This session focuses on geological and geophysical observations of fault healing in nature as well as frictional healing in the (experimental and numerical) laboratory. We welcome interdisciplinary and multi-scale studies of healing that use one or more techniques including but not limited to microscopy, high-speed friction experiments, numerical modeling of fault friction, and time-lapse tomography in the field. We envision the session will stimulate discussions surrounding mechanisms of healing down to the grain/asperity scale, and what this means for the diversity of slip modes (aseismic creep and slow slip to dynamic ruptures) observed at fault zones globally.

Invited speakers:

Kristina Okamoto (UC Santa Cruz)
Randolph Williams (Univ. Wisconsin – Madison) 

Take care,

Srisharan Shreedharan (UT Inst. Geophysics)
Caroline Seyler (UT Inst. Geophysics)
Behrooz Ferdowsi (Univ. Houston)
Alexis Ault (Utah State University)

 

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