[unav_all] SSA sessions of geodetic interest

Corné Kreemer cornelisk at unr.edu
Mon Jan 4 13:27:53 MST 2016

This year's SSA meeting is in Reno, NV, from April 20-21. Abstract 
deadline is Jan 11, 5pm PST.

There are several special sessions that may interest the geodetic community:


      Past and Future Seismic Moment Release: Contributions from
      Statistics and Geodesy

Reliable estimations of past earthquake moment release and its 
projection into the future are important from a theoretical perspective 
as well as for immediate practical use in earthquake hazard assessments. 
A long-standing issue is the typically large discrepancy between 
geodetic moment rate estimations and observed rates of seismic moment 
release reported in various tectonic environments with high seismic 
activity. Another question that has received attention is whether the 
large moment release in the last decade is a statistically significant 
deviation from a long-term expectation. This session proposes a forum 
for an inter-disciplinary dialog among experts in geodesy, seismology, 
and statistics to revisit these issues and address the following 
questions: How reliable are geodetic moment rate estimates given the 
unknowns in the strain-to-moment rate conversion? How to construct 
robust projections of seismic moment release with different time spans 
(years to hundreds of years) and spatial resolution? How to relate the 
existing estimations of geodetic and seismic moment release in different 
regions? We also welcome theoretical and observational studies that 
address closely related problems: estimating the regional maximal 
magnitude, testing the hypothesis of clustering of the largest 
earthquakes, developing approaches to assess seismic coupling, and more.

        Session Chairs

Corné Kreemer /<kreemer at unr.edu>/

Ilya Zaliapin /<zal at unr.edu>


      Short and Long-Term Deformation on Active Faults: Integrating
      Geodetic, Geologic and Seismic Constraints on Slip Rates and
      Off-fault Deformation in the Walker Lane and Beyond

Developing a complete and accurate understanding of the hazards posed by 
earthquakes increasingly relies on a framework that integrates data from 
geologic, seismic, and geodetic studies of faults. Each of these 
datasets has key strengths and weaknesses which can be addressed through 
comparison with the others. A growing body of evidence based on such 
comparisons suggests that some fraction of the plate boundary zone 
deformation budget is aseismic or occurs in a manner not recorded in the 
geologic or seismic record of slip on the trace major faults. Similarly, 
it is often unclear how geodetically-measured surface strain relates to 
earthquake potential. Thus these disagreements represent opportunities 
to gain a better understanding of the processes and strain budgets of 
earthquakes, and the modes of active crustal deformation. This session 
will focus on new constraints and analyses on patterns, style and rates 
of deformation that are the basis for comparison of fault behavior 
across the earthquake cycle, from strain accumulation to release. We 
welcome contributions on earthquake geology, paleoseismology, 
neotectonics, LiDAR, GPS, InSAR or other measurements that improve 
understanding of the behavior of active faults, especially integrative 
studies that shed new light on complete deformation budgets.

        Session Chairs

William Hammond /<whammond at unr.edu>/

Rich Briggs /<rbriggs at usgs.gov>/

Rich Koehler /<rkoehler3 at gmail.com>/

Corné Kreemer /<kreemer at unr.edu>


      Seismicity and Seismic Hazards of the Walker Lane and Western
      Great Basin

The region along and within the eastern side of the Sierra Nevada 
Mountains, from the Mojave Desert to southern Oregon, and extending a 
couple hundred kilometers into Nevada, is a prominent region of high 
hazards on the National Seismic Hazard Map. The region is characterized 
by distributed extensional and strike-slip faults. It experienced 
earthquakes with magnitudes ~7 in 1872, 1915, 1932, and 1954. Geodetic 
studies find that ~20-25% of the total deformation between the interiors 
of the North American and the Pacific plates take place in this region. 
Much has been learned about the seismic hazards of the region. However, 
the faults that accommodate the deformation may not all be identified, 
while slip rates and earthquake magnitudes on many known faults have 
large uncertainties. Some strain is partitioned through southern Nevada 
from the Walker Lane to the Wasatch fault system, but the mechanism and 
rate of this process, and its implication for hazards in Las Vegas is 
uncertain. Heterogeneous path effects due to the basin and range 
geology, together with highly variable site conditions, complicate 
ground motion prediction. Normal faults dip underneath the urban areas, 
including the spectacular Genoa - Mt. Rose system that dips beneath 
Carson City and Reno and the Frenchman Mountain fault that dips beneath 
Las Vegas, but the fault and basin geometries, expected ground motions, 
and other urban earthquake-related hazards, require more research. This 
session invites contributions related to all aspects of the seismic 
hazard of the region, including paleoseismology, seismicity, geodesy, 
and ground motions.

        Session Chairs

John Anderson /<jga at unr.edu>/

John Louie /<louie at seismo.unr.edu>/

Richard Koehler /<rkoehler3 at gmail.com>/

Corné Kreemer /<kreemer at unr.edu>/

Wanda Taylor /<wanda.taylor at unlv.edu>/


      Earthquake Source Parameters and Slip from Seismic, Geodetic and
      Laboratory Data: Theory, Observations and Interpretations

Understanding origin and spatio-temporal evolution of seismicity and 
deformation needs a careful quantitative analysis of earthquake source 
parameters for large sets of earthquakes in studied seismic sequences. 
Determining focal mechanisms, seismic moment tensors, slip 
distributions, radiated energy, aseismic deformation and other 
earthquake source properties and establishing their mutual relations can 
give an insight into tectonic stress and crustal strength in the area 
under study, material properties and prevailing fracturing mode 
(shear/tensile) in the focal zone, and other details of the earthquake 
source processes. Studying the relationship between static and dynamic 
parameters with earthquake size is essential to understanding the 
self-similarity of earthquakes and the scaling laws but also to help 
improve our ground motion prediction equations. The session aims to 
focus on methodological and observational aspects of estimating 
earthquake source parameters of natural or induced earthquakes on 
various scales from large to small earthquakes including laboratory 
experiments which can provide an opportunity to analyze seismic sources 
under partially controlled conditions. Presentations of new approaches 
to determining focal mechanisms, seismic moment tensors and other source 
parameters as well as interpretations of the source parameters for sets 
of earthquakes in case studies are welcome. Equally, contributions about 
self-similarity of earthquakes down to very small ruptures and about 
scaling relations for static and dynamic parameters of earthquakes are 

        Session Chairs

Vaclav Vavrycuk /<vv at ig.cas.cz>/

Grzegorz Kwiatek /<kwiatek at gfz-potsdam.de>/

German Prieto /<gprieto at mit.edu>


      Earthquake Early Warning: Network Design, Implementation,
      Production and Outreach

This session focuses on recent and future efforts to design and 
implement earthquake early warning systems worldwide. Submissions 
addressing the variety of earthquake detection algorithms, network 
design for robust data delivery, and outreach efforts are encouraged. 
Multi-hazard networks that address early ignition detection for wildfire 
and other monitoring systems such as extreme weather would also benefit 
this session.

        Session Chairs

Graham Kent /<gkent at unr.edu>/

Ken Smith /<ken at unr.edu>


      The Role of Shallow Slip on Faults

Resolving the spatial and temporal distribution of shallow fault slip is 
difficult since only the most near-field data are sensitive to shallow 
slip. Complicating these analyses is the fact that near-field data are 
rare: seismic and GPS station spacing is often too sparse, and 
interferograms tend to decorrelate near the rupture zone. But new 
datasets (including LiDAR, UAVSAR, new SAR satellites with shorter 
repeat times, and various types of optical imagery) are providing 
unprecedented, spatially dense, near-field observations. These new 
observations are allowing for a new generation of high-resolution 
shallow slip models which, in turn, are leading to new discoveries in 
the rheology and evolving deformation of fault zones. We invite 
presentations that look at innovative data sources and analyses 
(including methods for integrating near-field data that image the 
shallow parts of the fault with far-field data that are sensitive to 
deeper slip), advances in modeling methods, and case studies of shallow 
slip before, during, and after earthquakes.

        Session Chairs

Sarah Minson /<sminson at usgs.gov>/

Benjamin Brooks /<bbrooks at usgs.gov>/

Jessica Murray /<jrmurray at usgs.gov>


      Seismotectonics Beyond the Plate Boundary

In the past decade, the passage of the USArray across the United States 
and the drastic increase in induced seismicity in the mid-continent have 
provided unprecedented opportunities to understand the physical and 
seismotectonic state of the lithosphere. We hope to bring together 
researchers interested in the state of stress, crustal and upper mantle 
structure and the interaction between ancient features and modern 
strain, intraplate fault properties, and ultimately the geodynamic 
context of both natural and induced seismicity in continental interiors, 
both in North America and worldwide.

        Session Chairs

Will Levandowski /<wlevandowski at usgs.gov>/

Christine Powell /<capowell at memphis.edu>/

Oliver Boyd /<olboyd at usgs.gov>/

   Corné Kreemer
   Research Associate Professor
   Nevada Geodetic Laboratory
   Nevada Bureau of Mines and Geology
   University of Nevada, Reno
   tel. 775-682-8780
   fax  775-784-1709

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