Please see below for sessions of interest to the GeoPRISMS Community, taking place at the 2016 EGU General Assembly in Vienna, Austria (17-22 April) and the 2016 SSA Meeting in Reno, Nevada (20-22 April)
SSA abstract deadline is January 11, 2016
EGU abstract deadline is January 13, 2016
SSA sessions
Multidisciplinary Studies of Earthquakes Slow, Fast, and In Between: A Broad Range of Fault Behavior in Space and Time
Session Chair: Abhijit Ghosh (aghosh.earth@gmail.com)
Faults show a variety of motion over a range of spatiotemporal scale and frictional regime. It includes large damaging earthquakes in the seismogenic zone, slow earthquakes at the edges of the seismogenic zone, tsunamigenic earthquakes near the subduction trench and so on. How they influence and interact with each other, however, remain enigmatic. There are indications that slow slip precedes large damaging megathrust earthquakes in some cases. Regular fast earthquake results in changes in behavior of slow earthquakes. Repeated slow earthquakes load the updip seismogenic part that nucleates large destructive earthquakes. While these findings are compelling, the underlying physics is poorly understood. Controls of fault rheology on different modes of fault slip over a range of pressure and temperature and its affects on the seismic cycles are largely unknown. I invite studies aiming to understand the broad nature of fault slip and their implications on seismic hazard based on theory, observation, modeling, field and/or laboratory experiments. In-depth studies focusing on mechanism of diverse modes of fault slip including but not limited to slow slip, tremor, swarms, repeating earthquakes in all tectonic settings are welcome. I encourage holistic studies involving a wide spectrum of fault slip behavior.
EGU sessions
SM2.4/TS4.4 The mechanics of slow earthquakes and the spectrum of fault slip behaviors (co-organized)
Convener: Chris Marone
Co-Conveners: Jessica Hawthorne, Cristiano Collettini
Dear Colleagues,
We are running a special session on Slow Earthquakes and the Spectrum of Fault Slip Behaviors at the upcoming EGU meeting. The session description is below. Please consider submitting an abstract and joining what is sure to be an interesting, vibrant discussion in Vienna.
Our session will have Invited presentations by:
Pablo Ampuero, Caltech,
Ake Fagereng, University of Cardiff,
Matt Ikari, University of Bremen
Please let us know if you have questions or comments.
Cheers, Chris, Cristiano, & Jessica
Slow earthquakes represent a mode of self-sustained fault rupture in which slip
accelerates slowly but does not reach rates sufficient to radiate high-frequency seismic
energy. The widespread occurrence of slow earthquakes in different tectonic settings and in some cases also during human induced seismicity
suggests a generic mechanism that may differ from many of those proposed thus far. Although existing models can explain slow-slip transients under certain conditions or for specific frictional rheologies, many fundamental questions remain. For example, what determines the fault slip speed and rupture propagation velocity in slow earthquakes and in other forms of quasi-dynamic rupture? What processes limit stress drop in slow earthquakes? How do slow and regular earthquakes interact in space and time, and what is the geologic record of slow earthquakes? We welcome multidisciplinary contributions that shed light into the physics of slow earthquakes and the spectrum of fault slip behaviors.
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TS5.1/GD5.7/GM4.9 The evolution and architecture of rifts and rifted passive margins: from mantle dynamics to surface processes (co-organized)
Convener: Ritske Huismans
Co-Conveners: Delphine Rouby, Magdalena Scheck-Wenderoth, Jan Inge Faleide
The formation of rifted continental margins by extension of continental lithosphere leading to seafloor spreading is a complex and still poorly understood component of the plate tectonic cycle. New observations and modelling allow us to investigate the underlying processes. Key questions that need to be resolved include 1) factors that control the geometry and crustal architecture or rifted margins, 2) the role of strain localisation and strain partitioning throughout the rift history, 3) factors controlling the 3-dimensional geometry of rifts and passive margins, 4) processes responsible for anomalous vertical motions during basin evolution such as phase changes or small scale convective instability of the mantle lithosphere, 5) fundamental controls on the magmatic or a-magmatic nature of rifts and passive margins, 6) interaction between surface processes, tectonics, and climate during rift-passive margin evolution. We encourage abstracts that offer new insights into crustal and lithospheric architecture and processes underlying rifting and passive margin formation as well as smaller scale studies of individual sedimentary basins, using constraints from observations and modelling.