Probabilistic completeness assessment of the past 30 years of seismic monitoring in northeastern Italy

► We investigated the recording completeness of the OGS network during 1977-2007. ► We applied probability-based magnitude of completeness method by Schorlemmer and Woessner (2008). ► We introduced some constraints on the method for networks with sparse data. ► We revised the relationship between duration and local magnitudes of OGS catalog. ► We show that the OGS catalog is the most complete dataset in NE Italy since 1977.