Emmy-Noether-Project "Bridging Geodesy and Seismology"

Building of finite-source earthquake catalog databases with uncertainty communication

Dummy image
Through the data combination we will be able to provide more robust and added-value earthquake source models

 

 

Dummy image
Baysian ensembles of model parameters (black dots) and optimum model solutions of different studies.                                         Sudhaus

 

The most used and very valuable catalogs on earthquake source models are provided by seismological institutes that producing first-order seismic moment tensor models of earthquake ruptures worldwide for earthquake at least larger than magnitude 5, e.g. USGS (United States Geological Survey), Geofon (German seismological database) and others.

These earthquake source models give the time, location, magnitude and the mechanism of the earthquake (thrust, strike-slip or normal faulting earthquakes) in form of a point source.

Using the combination of seismic waveform data and surface displacement data

With the combination of the global data sets of seismic waveform data and surface displacement data enables us to robustly represent shallow crustal earthquakes as finite fault ruptures with a nucleation point. Potentially, we better locate the earthquakes and therefore have better information on the causative fault and resolve the extension of the fault.

Be able to model the rupture directivity

With this we will be able to model also the rupture directivity, which is for larger earthquake very relevant for the seismic hazard and to expected damage in the epicentral region. As an outcome of the project we want to have started building a catalog with such finite rupture models and have progressed towards a routinely analysis for these events.

Geofon

SRCMOD Database