Four AGU Special Session Announcements

It’s time again for AGU Special Session announcements! Below are four that have been submitted to SCEC for distribution to the community; the abstract submission deadline is August 4.

----------------------Special AGU session T39-----------------------

Dear all,

We would like to invite you to submit an abstract to session T-39 on “Properties and Physics of Fault Zone damage" in the coming AGU meeting. The session is described below. We anticipate exciting multi-disciplinary contributions with state-of-the-art results based on theory, experiments and observations. More information is available at <http://sites.agu.org/fallmeeting/>

Cheers, Yehuda, Mai-Linh and Amir

T-39: Properties and Physics of Fault Zone damage

Fault zones show increasing damage toward their core. Damage involves energy absorption and reflects stresses and effective rheology during failure. Despite many years of studies, some key questions remain unsolved: What are the proper metrics to characterize fault damage, its intensity, and energy absorption? How much slip is localized in various environments? How damage affects the seismic cycle physics and radiation? Answering these and related questions requires interdisciplinary studies, including: damage at low and high strain rate, healing, partition between brittle and ductile components, transition from a solid to granular shear zone, roughness and heterogeneity. Presentations based on theory, experiments and observations are welcomed.

Conveners: Mai-Linh Doan, Amir Sagy, Yehuda Ben-Zion

----------------------Special AGU session S24-----------------------

Dear Colleagues,

We would like to draw your attention to the following session (description below) that was accepted for AGU fall meeting in San Francisco, 5-9 December 2011.  The topic of the session want to bring together scientists working on earthquake source related problems from laboratory experiments, seismological observation, kinematic and dynamic source inversion and forward physics-based rupture models, with the goal to address the importance to constraint earthquake source models with experimental, seismological and field observation. We encourage contributions from any aspect related to this topic.  We are looking forward to your submission and an exciting session. 

Luis Dalguer, Andrea Bizzarri, Stefan Nielsen, and Shamita Das

S24: Toward Seismic Rupture Models with Constraints from Experimental and Seismological Observations

Seismic rupture studies rely on a broad spectrum of methods that go from purely kinematic to fully dynamic description. The former incorporate observational constraints into the source but lack physical constraints, and the latter introduce laws of continuum mechanics and frictional sliding, but the friction laws lack constraints from seismological data. Lab experiments on friction or fault analogical models can provide useful insight into these problems. Source models from waveform inversion can benefit by integrating independent constraints derived from observational and experimental data. We welcome novel studies that consider some or all of the above aspects in the study of earthquake rupture.

Conveners: 

Luis A. Dalguer (ETH-Zurich, dalguer@sed.ethz.ch)
Andrea Bizzarri (INGV-Bologna,  bizzarri@bo.ingv.it)
Stefan Nielsen  (INGV-Roma, nielsen@ingv.it)
Shamita Das  (University of  Oxford, das@earth.ox.ac.uk)

----------------------Special AGU session T38-----------------------

We invite you to submit an abstract to the AGU Session this Fall:

T38: Physico-chemical Properties of Fault Rocks from the Frictional-Viscous Transition to the Shallow Crust

Description: Physical and chemical properties of fault rocks evolve with increasing slip and duration of fluid interaction, and are largely dependent on P, T, strain rate, and rock composition. This has important implications for the seismic cycle, the healing and sealing of fault zones, and the evolution of the stress field. Fault rocks also contain important information about the slip and exhumation history of fault zones. A variety of studies are rapidly improving our understanding of these processes. We invite contributions relevant to the nature and evolution of fault rocks from the frictional-viscous transition to the shallow crust based on field, laboratory, geophysical and modeling studies.

Convened by:
Amy Luther, New Mexico Tech
Gary Axen, New Mexico Tech
Andre Neimeijer, Utrect University
Steven Smith, INGV

----------------------Special AGU session S23-----------------------

Abstract submission for the 2011 AGU Fall meeting (5-9 December 2011) is now open and we would like to point out session S23 on "The Static vs. Dynamic Earthquake Triggering Debate: What’s New and What’s Next?", sponsored by the Seismology (S) section and co-sponsored by the Tectonophysics (T) and Natural Hazards (NH) sections. We encourage your contribution and participation. Please feel free to forward this email to anyone potentially interested.

Session S23: The Static vs. Dynamic Earthquake Triggering Debate: What’s New and What’s Next?

Session Description: There is a debate on whether static or dynamic stress dominates in earthquake triggering. Arguments for static triggering derive from the correlation of seismicity rate changes with Coulomb stress changes. Evidence for dynamic triggering is based on preferred triggering in the rupture direction, and remote triggering beyond the static effects. Which is more important in the near field, how can we explain the time delay, and what light do recent earthquakes shed on this debate? We invite abstracts on all aspects of triggering for earthquakes, tremor and slow-slip events. We welcome tests of current hypotheses, proposals for alternative mechanisms, and evaluations of their impact on seismic hazard assessment.

Conveners:
Chunquan Wu, EAS, Georgia Institute of Technology, Atlanta <chunquanwu@gatech.edu>
Bogdan Enescu, National Research Institute for Earth Science and Disaster Prevention (NIED), Tsukuba, Japan <benescu@bosai.go.jp>
Shinji Toda, DPRI, Kyoto University, Kyoto, Japan <toda@rcep.dpri.kyoto-u.ac.jp>
Ross S. Stein, U.S. Geological Survey, Menlo Park <rstein@usgs.gov>

Session link: http://sites.agu.org/fallmeeting/scientific-program/session-search/736

We are looking forward to seeing you at the Meeting.

Thank you for considering this session.