THE MACROSEISMIC MAP OF THE 1992 ROERMOND EARTHQUAKE, THE NETHERLANDS

Six countries contributed to a data base covering macroseismic observa tions from nine countries affected by the April 13, 1992 Roermond eart hquake. Despite the diversity of data sources and variety of approache s by researchers in the countries involved, particularly concerning as pects of data acquisition and intensity assignment, a clear overall-pi cture of the macroseismic effects could be achieved. An acceptable est imate has been made of the following parameters: macroseismic focal de pth h (= 18 km), intensity attenuation alpha (= 0.001), the 'theoretic al' epicentral intensity I-0 (= 7.4) and the macroseismic local magnit ude (= 5.6). For further study the complete macroseismic data base is available as an ASCII-file on diskette.