EXCHANGE OF DIGITAL SEISMOLOGICAL WAVE-FORM DATA IN EUROPE - STATUS AS ILLUSTRATED BY DATA-COLLECTION FOR THE 1992 ROERMOND EARTHQUAKE, THENETHERLANDS

The 1992 Roermond earthquake (location 51.16 degrees N, 5.95 degrees E ; M(L) = 5.8) provides a good opportunity to evaluate the current stat us of exchange of digital waveform data in Europe. For this purpose da ta are collected from broadband and short-period seismograph stations. It is the intention to publish these data on CD-ROM. The data set is evaluated on data quality, accessibility and spatial coverage of the r ecording stations. In order to compare signals from different stations attention has been given to the instrumentation. Evaluation shows tha t in contrast to broadband networks, short-period networks in north-we st Europe are not prepared for an event of this magnitude. It is recom mended to increase the limited dynamic range of most digital stations and to evaluate the effectiveness of the currently used bandwidth. Fin ally, an organized common access to the data set, as is realized for t he broad-band data, is recommended for regional, short-period networks .