[iris-bulk] abstracts - European Seismological Commission ESC 2008

[IRIS]

The deadline for abstracts to European Seismological Commission ESC
2008, 31st General Assembly,"Creta Maris", Hersonissos, Crete, Greece,
from 7 to 12 September, 2008 is approaching. Abstracts are expected
before 15 June 2008.

Contributions (oral and poster) are invited for the thematic area:

3. Physics of the Earthquake Source

Session Code:  PHYS-2 - SOURCE
Session Title:
Natural and induced earthquakes: Double Couple and non-Double Couple  
source mechanisms

Please visit the website at: http://www.esc2008.org/sprogramme.aspx

With best wishes,
Jan Sileny, Bruce R. Julian
Session Conveners

Jan Sileny
Geophysical Institute, Academy of Sciences
Bocni II/1401, 14131 Praha 4, Czech Republic
Tel: +420-267103016
Fax: +420-272761549
E-mail: jsi at ig.cas.cz

Bruce R. Julian
Earthquake Hazards Team        E-mail: julian at usgs.gov
U. S. Geological Survey        Office: 650/329-4797
345 Middlefield Rd., MS977     FAX:    650/329-5163
Menlo Park, CA 94025

Session Description:

The traditional view that earthquakes are caused by shear faulting has  
broadened in recent decades, as data from dense networks and  
sophisticated (e.g. broad-band) seismometers have identified  
departures from the “double couple” (DC) source model, particularly in  
environments such as volcanoes and exploited geothermal and  
hydrocarbon reservoirs.

Understanding the physical source processes of these events is  
important both as fundamental science and for application to volcano  
monitoring and energy extraction.

At the same time, however, more complicated non-DC source models are  
more difficult to quantify experimentally, and their study raises  
challenging problems of the uniqueness of derived mechanisms, the  
resolving power of various methods and data types, the effects of  
noise, and biases that may result from effects such as anisotropy and  
inevitable deficiencies in models of Earth structure.

These problems can introduce spurious non-DC components into  
calculated source mechanisms, so realistic error budgets must be taken  
into account to avoid erroneous interpretation of experimental results.

If this is done, adoption of the moment-tensor formulation allows non- 
DC components to be derived reliably and offers the chance to study  
important structural features and source processes involving fluids  
that are ignored in pure shear-slip source models.


-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.iris.washington.edu/pipermail/bulkmail/attachments/20080521/9a96b2cf/attachment.html