AGU Session Announcements | Week of July 23rd - July 28th, 2018

Dear SCEC Community,

Please see below for the following AGU session-related announcements:

1. T025: Interplay between seismic and aseismic slip: Implications for fault physics (Session ID#: 43301)
2. S009: Extracting Information from Geophysical & Geochemical Signals: Applying Machine Learning Through Data Science Challenges (Session ID#: Not Provided)
3. G024: The Role of Geodesy and Remote Sensing in Preparedness, Hazard Monitoring, and Disaster Response (Session ID#: 47172)
4. S020: Multi-scale interactions between foreshocks, mainshocks and aftershocks: observations and physical mechanisms (Session ID#: 45580)
5. T018: Flow and fracture: mixed brittle-viscous behavior throughout the lithosphere (Session ID#: Not Provided)

This is the time of the year we continue to receive multiple requests to send AGU session-related announcements, particularly calls for abstracts. As usual, we will combine them together, if many are received in a week (as we have done again below). Please follow the formatting guidelines for announcement requests, always provided below the announcement.

Regards,

SCEC Information

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1. T025: Interplay between seismic and aseismic slip: Implications for fault physics (Session ID#: 43301):
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Dear colleagues,

We would like to remind you that the abstract submission deadline for the 2018 AGU Fall Meeting is Wednesday, August 1st at 23:59 EDT. We invite contributions to the following session co-organized by the Tectonophysics, Seismology and Geodesy sections:

T025: Interplay between seismic and aseismic slip: Implications for fault physics
Session ID#: 43301

Invited speakers:
Carl Tape, University of Alaska Fairbanks
André Niemeijer, Universiteit Utrecht

Session Description:
Faults at tectonic boundaries accommodate plate motion through an array of seismic and aseismic modes of deformation. Even within these categories, there are important differences among event slip characteristics. For example, earthquakes exhibit variations in their frequency content and tsunamigenic potential. Aseismic slip transients are often, but not always, accompanied by tectonic tremor, and there remains much to be understood about the relationship between aseismic transients and earthquake nucleation. We invite contributions from observational, experimental, geological and theoretical studies that explore the variations in and interplay among seismic and aseismic slip phenomena in various tectonic settings, including the following questions: (1) Are different slip behaviors well separated in space, or can the same fault areas experience different failure modes? (2) Is there a systematic spatial or temporal relation between different slip types? (3) What are the physical mechanisms that govern this complex behavior?

Conveners:
Valère Lambert, California Institute of Technology
Kathryn Materna, University of California Berkeley
Tomoaki Nishikawa, Disaster Prevention Research Institute, Kyoto University
Yohei Hamada, Japan Agency for Marine-Earth Science and Technology

2. S009: Extracting Information from Geophysical & Geochemical Signals: Applying Machine Learning Through Data Science Challenges (Session ID#: Not Provided):
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Dear colleagues,

We would like to draw your attention to the following session co-organized by the Seismology, Tectonophysics, Nonlinear Geophysics and Mineral and Rock Physics sections at the upcoming 2018 AGU fall meeting:

S009: Extracting Information from Geophysical & Geochemical Signals: Applying Machine Learning Through Data Science Challenges

Session Description:

Major breakthroughs in geophysics are anticipated as more researchers turn to machine learning and other data science techniques; however, owing to the inherent complexity of machine learning methods, they are prone to misapplication, may produce uninterpretable models, and are often insufficiently documented. This combination of attributes hinders both reliable assessment of model validity and consistent interpretation of model outputs. By providing documented datasets and challenging teams to apply fully documented workflows for machine learning approaches, we expect to accelerate progress in the application of data science to longstanding research issues in geophysics. This session has two goals: (1) to announce machine learning challenges to the community that address earthquake detection and the physics of rupture and the timing of earthquakes; and (2) to solicit papers on the use of different machine learning techniques related to the identification of the physics contained in geophysical and chemical signals, as well as from images of geologic materials (minerals, fracture patterns, etc.)

Conveners:

Paul A. Johnson (paj@lanl.gov) Los Alamos National Laboratory

Gregory C. Beroza (beroza@stanford.edu) Stanford University

Jim Rustad (James.Rustad@science.doe.gov) Department of Energy

Laura J. Pyrak-Nolte (ljpn@purdue.edu) Purdue University

3. G024: The Role of Geodesy and Remote Sensing in Preparedness, Hazard Monitoring, and Disaster Response (Session ID#: 47172):
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Dear colleagues,
we are pleased to announce our session at the 2018 AGU Fall Meeting in Washington, DC:
G024: The Role of Geodesy and Remote Sensing in Preparedness, Hazard Monitoring, and Disaster Response
Please consider submitting an abstract to this session (using the link below) and passing along this announcement to colleagues and students who may be interested.
https://agu.confex.com/agu/fm18/prelim.cgi/Session/47172
Session description: The past decade has seen order-of-magnitude improvements in the spatial and temporal resolutions, geographical coverage, and open accessibility of geodetic data and other remotely-sensed imagery. This session will explore how these technologies can further enhance the preparedness, monitoring, and rapid response to natural and anthropogenic hazards and disasters. These include earthquakes, tsunami, volcanic unrest and eruption, slope instabilities and failures, hurricanes, coastal subsidence, flooding, and wildfires. Challenges include processing, modeling and analyzing large 2-D, 3-D and 4-D datasets; differentiating geophysically and/or societally-meaningful signals that may be small and transient from ‘noise’; coordinating efforts across and beyond the geodesy community; and communicating results with government agencies and the general public. We seek contributions spanning the full suite of measurements (e.g. surface reflectance, texture, coherence, displacement, and topography), sensors (optical, lidar, radar, GNSS), and platforms (satellite, airborne, unmanned, terrestrial). We welcome a breadth of perspectives from scientists, engineers, geophysical agencies, and others.

Invited speakers: Angie Diefenbach (USGS), Luis Moya (Tohoku University)

Best wishes from the session conveners,

Ed Nissen (University of Victoria), Susanna Ebmeier (University of Leeds), Ken Hudnut (USGS)

4. S020: Multi-scale interactions between foreshocks, mainshocks and aftershocks: observations and physical mechanisms (Session ID#: 45580):
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We would like to invite you to submit an abstract to our AGU session on foreshock-mainshock-aftershock interaction (https://agu.confex.com/agu/fm18/prelim.cgi/Session/45580). We have invited Phoebe DeVries from Harvard to talk about deep learning aftershocks and Suguru Yabe from JAMSTEC to present numerical simulations of foreshocks and aftershocks. The abstract submission deadline is August 1st.

S020: Multi-scale interactions between foreshocks, mainshocks and aftershocks: observations and physical mechanisms
This session seeks contributions that advance our understanding of the physical mechanisms responsible for the multi-scale interactions between foreshocks, mainshocks, and aftershocks. While static stress changes are often considered the primary driving mechanism, other factors such as dynamic stress changes, fluid migration, poroelastic deformation, and aseismic slip can also promote earthquake triggering over various spatial and temporal scales. Moreover, the spatiotemporal evolution of such earthquake interactions may provide valuable information on the fault geometry and structure at depth, faulting styles, and the mainshock rupture process. We encourage seismic, geodetic, and geological observations that illuminate the fault structure and stress state associated with these interactions. We also welcome experimental, theoretical, and numerical results that provide physical constraints on the mechanisms responsible for the interactions.

Best regards,
Yihe Huang (University of Michigan)
Ahmed E. Elbanna (University of Illinois at Urbana Champaign)
Zachary E. Ross (California Institute of Technology)

5. T018: Flow and fracture: mixed brittle-viscous behavior throughout the lithosphere (Session ID#: Not Provided):
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Have you submitted your abstract to AGU yet? Or are you still waiting for the most inspiring session announcement email to cross your desk?

Hope you will consider submitting to T018- Flow and Fracture: Mixed brittle-viscous behavior throughout the lithosphere

This session will have something for everybody - rocks, rock analogs, numerical meshes which behave somewhat like rocks... If you ever wanted to better describe the effects of biting into an ice cream sandwich*, this is the session for you.

Full Description:
Observations of naturally deformed rocks demonstrate that discrete brittle structures are found in regions of the earth associated with ductile deformation, including hot crust, melt or fluid-migration structures, and slowly deforming areas. Similarly, examples of continuous deformation within the "brittle"€™ crust abound -- from soft sediment deformation, to cataclastic flow in fault zones, to post-seismic plastic deformation. Advances in laboratory experiments and numerical techniques have accelerated our phenomenological and quantitative understanding of geologic environments where brittle-ductile behavior might be rate-dependent, scale-dependent, fluid pressure-dependent, reaction-dependent, or time-dependent. Classic lithospheric strength profiles are based on locating intersections between frictional and viscous flow laws, but don't account for solution creep or for spatially variable strain rates that we know characterize deforming regions of the earth. This session invites observations of mixed brittle-viscous behavior, conceptual or mechanical models of spatially and temporally heterogeneous deformation mechanisms, and bulk rheological consequences of mixed behavior.

Invited Speakers:
Cailey Condit (MIT) and Jacqueline Reber (U Iowa)

Many thanks, see you in DC!

Christie Rowe
Chris Gerbi
Andre Niemeijer
Whitney Behr

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