Seismic hazard in Fennoscandia: a regionalized study

• Main Authors: Mantyniemi, P., Wahlström, R., Lindholm, C., Kijko, A.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: 1993
• Subjects: 550 - Earth sciences; Norway; Fennoscandia; Fennoscandian
• Online Access: https://gfzpublic.gfz-potsdam.de/pubman/item/item_232440

A seismic hazard evaluation has been conducted for Fennoscandia, including Norway, Sweden, Finland, Denmark, areas of Russia, and adjacent sea areas. Severel subregions were considered. Data were taken from a Fennoscandian earthquake catalog comprising both macroseismic and instrumental observations. The analysis was based on a maximum likelihood approach using incomplete historical and complete instrumental data, different detection thresholds, and assessment of earthquake magnitude uncertainty. The obtained parameters correspond well to the charcteristics seismicity features of inspected regions. However, discrepancies between the data used and the data model behind the applied method were observed: both the patterns of earthquake occurrence and the reporting of historical events tend to deviate from the model. Differences in output can be expected according to the decisions to deal with these discrepancies. -from Authors