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Authors: Schorlemmer, D.* 
Christophersen, A.* 
Rovida, A.* 
Mele, F.* 
Stucchi, M.* 
Marzocchi, W.* 
Title: Setting up an earthquake forecast experiment in Italy
Issue Date: 2010
Series/Report no.: 3/53 (2010)
DOI: 10.4401/ag-4844
Keywords: Statistical analysis
Earthquake interactions and probability
Seismic risk
Collaboratory for the Study of Earthquake Predictability
Subject Classification04. Solid Earth::04.06. Seismology::04.06.02. Earthquake interactions and probability 
Abstract: We describe the setting up of the first earthquake forecasting experiment for Italy within the Collaboratory for the Study of Earthquake Predictability (CSEP). CSEP conducts rigorous and truly prospective forecast experiments for different tectonic environments in several forecast testing centers around the globe; forecasts are issued for a future period and also tested only against future observations to avoid any possible bias. As such, experiments need to be completely defined. This includes exact definitions of the testing area, of learning data for the forecast models, and of observation data against which forecasts will be tested to evaluate their performance. Here we present the rules, as taken from the Regional Earthquake Likelihood Models experiment and extended or changed for the Italian experiment. We also present characterizations of learning and observational catalogs that describe the completeness of these catalogs and illuminate inhomogeneities of magnitudes between these catalogs. A particular focus lies on the stability of earthquake recordings of the observational network. These catalog investigations provide guidance for CSEP modelers for developing earthquakes forecasts for submission to the forecast experiment in Italy.
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