Abstract: For determining the regional impact of earthquake events, geographical regions are associated with reference measuring stations located in the respective geographical region. For each of the geographical regions, regional earthquake indices are determined based on instrumental intensity values that are received from the region-specific measuring stations and indicate the strength of seismic motion. Each of the intensity values are weighted with a weighting factor assigned to the reference measuring station that provided the intensity value. Associating only selected reference measuring stations with a geographical region and weighting the intensity values with station-specific weighting factors make it possible to select reference measuring stations and weighting factors according to the geographical distribution of replacement values and, thus, to provide earthquake indices that correlate accurately with potential earthquake damages.

Abstract: For determining the regional impact of earthquake events, geographical regions (3, 4, 5) are associated with reference measuring stations (31, 32, 33, 41, 42, 43, 51, 52, 53) located in the respective geographical region (3, 4, 5). For each of the geographical regions (3, 4, 5), determined are regional earthquake indices based on instrumental intensity values that are received from the region-specific measuring stations (31, 32, 33, 41, 42, 43, 51, 52, 53) and indicate the local strength of seismic motion. Each of the intensity values is weighted with a weighting factor assigned to the reference measuring station (31, 32, 33, 41, 42, 43, 51, 52, 53) that provided the intensity value.