Multiple Announcements: AGU 2020 Calls for Abstracts

Dear SCEC Community,

Please see below for the following announcements:

1. AGU Session: Fifty Years of the Brune Earthquake Source Model: What Have we Learned, and What is Next?
2. AGU 2020 Session Abstract Call: "T017 - Multidisciplinary Geophysical Imaging of Natural Hazards Related to Plate Tectonics”
3. AGU S001 - Advances in understanding the mechanics behind aseismic transient slip events" at the 2020 AGU Fall meeting.

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1. AGU Session: Fifty Years of the Brune Earthquake Source Model: What Have we Learned, and What is Next?:
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Dear Colleagues:
We are convening a broad AGU session that we hope will be of interest to you. Our aim is to look forward to new directions, as well as review past and present.
Please consider submitting an abstract to our AGU Session.
Thank you
Rachel Abercrombie, Annemarie Baltay, Stefan Nielsen and Bill Walter.
Session Title - Fifty Years of the Brune Earthquake Source Model: What Have we Learned, and What is Next?
Section – Seismology (with Nonlinear Geophysics, Natural Hazards and Tectonophysics)
Session Details - https://agu.confex.com/agu/fm20/prelim.cgi/Session/104894

Conveners:
Rachel E Abercrombie, Boston University, Boston, MA, United States
Annemarie Baltay, U.S. Geological Survey, Menlo Park, CA, United States
Stefan Nielsen, University of Durham, Durham, United Kingdom
William R Walter, Lawrence Livermore Lab, Livermore, CA, United States

Abstract: 50 years ago, the simple and useful Brune earthquake source model was published in the AGU Journal of Geophysical Research. The paper is one of the most cited in all aspects of seismology, and it has become the standard used in studies of earthquake physics, tectonic stress, ground-motion prediction, nuclear monitoring, earth rheology and more.
The model quantifies the measurable parameters of an instantaneous, circular-slip earthquake rupture. It provides a framework in which to link seismic observations to basic earthquake source physics including scaling of parameters between different sized events.
We invite contributions related to past, present and future applications of the Brune earthquake model. How has the model has been used and influenced seismology over the past half century? How is it being used today across the range of applications? What are the limitations of assuming such a simple model, and what new alternatives are being developed?

The abstract submission is open until deadline on Wednesday, 29 July 2020
(https://www.agu.org/Fall-Meeting/2020/Present/Abstracts).
The meeting will be "mostly virtual" this year and takes place from 7-11 December (https://www.agu.org/Fall-Meeting).

2. AGU 2020 Session Abstract Call: "T017 - Multidisciplinary Geophysical Imaging of Natural Hazards Related to Plate Tectonics"?:
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Dear Colleagues,

Please consider submitting an abstract to our (mostly virtual) AGU 2020 Fall Meeting session, "T017 - Multidisciplinary Geophysical Imaging of Natural Hazards Related to Plate Tectonics"

The session description is as follows:

Subsurface material and geometrical properties of natural hazard causing systems, like seismogenic fault zones and active volcanic systems, give insight into their evolutionary history and influence their future behavior. Active and passive seismic signals, electromagnetic signals, and perturbations in the Earth's gravitational and geodetic fields observed from land and space, offer diverse complementary signals which can be used to constrain these properties. Imaging hazard related structures using such diverse signals requires combining novel approaches in acquiring and analyzing large datasets with constraints from theory and the laboratory. Jointly analyzing and interpreting the results is imperative to achieving a holistic understanding of hazardous systems' behavior and their impacts on human civilization. In this session, we welcome all contributions pertaining to multidisciplinary geophysical imaging of hazardous natural phenomena––especially new techniques or new applications using diverse data, studies on time-dependent physical property changes, and joint inversions and interpretations of multidisciplinary geophysical data.

Conveners:
Pieter-Ewald Share, Oregon State University
Ninfa L Bennington, USGS Hawaiian Volcano Observatory
Malcolm C A White, University of Southern California

The abstract deadline is July 29, 2020 at 23:59 EDT. You may submit an abstract to this session using the following URL: https://agu.confex.com/agu/fm20/prelim.cgi/Session/104575

3. AGU S001 - Advances in understanding the mechanics behind aseismic transient slip events" at the 2020 AGU Fall meeting.
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Dear colleagues and friends,

Please consider submitting an abstract to our session "S001 - Advances in understanding the mechanics behind aseismic transient slip events" at the 2020 AGU Fall meeting.

https://agu.confex.com/agu/fm20/prelim.cgi/Session/101972
Slow, aseismic slip provides insight into areas of faults where frictional properties are conditionally stable. Yet our current understanding of the mechanics of slow slip transients cannot explain either their broad diversity, both temporal and spatial, or their implications for earthquake hazards. Complex interactions with tectonic tremor, regular earthquakes, or earthquake swarms are often observed, suggesting a direct, but still unclear connection between aseismic and seismic slip. Indirect evidence hints that high pore fluid pressures affect some slow slip events. While slow slip signals were observed before some large earthquakes, a better understanding of the mechanics behind aseismic transient slip events could reveal possible forecasting applications.

This session welcomes: studies of aseismic transient slip observations, including interactions between aseismic and seismic slip behavior; studies of the mechanical properties or physics of aseismic transient slip, including modeling and laboratory work; and studies relating transient slip processes to seismic hazards.

The abstract submission is open until Wednesday, 29 July 2020, 11:59 p.m., ET.

Sincerely,

Lucile Bruhat (Ecole Normale Superieure, Paris)

Kathryn Materna (USGS Earthquake Science Center)

Noel Bartlow (University of California Berkeley)

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