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Geophysical Research Abstracts Vol. 19, EGU2017-5427, 2017 EGU General Assembly 2017 © Author(s) 2017. CC Attribution 3.0 License. How to show the existence of water in seismic catalogues? Denis Legrand and Marco Calò Universidad Nacional Autonoma de Mexico, Instituto de Geofisica, UNA2907227Y5, Mexico DF, Mexico ([email protected]) Fluids, such as water and/or magma are often involved in the rupture process of tectonic or volcanic processes. It can be deduced by seismic imaging techniques (i.e attenuation, Vp/Vs, scattering), source analysis (e.g. moment tensor inversion) or Coulomb stress changes but also more simply using earthquake catalogues. Specific scaling laws such as the Gutenberg-Richter law or Omori law may be used to indirectly deduce the existence of fluids in regions where seismic rupture occur. For example high b-values or break in the slope of frequency-magnitude relation and the respect (or not) of Omori law may characterize the presence of fluids. We show a few examples in tectonic and volcanic contexts.
