Seismotectonics and Lithospheric Stresses in the Northern

• Main Authors: Fennoscandian Shield, Rutger Wahlström, Bela A. Assinovskaya
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 1996
• Subjects: Key words; seismotectonics; lithospheric stress; Fennoscandian Shield; Fennoscandia; Fennoscandian
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.573.8770; http://www.geophysica.fi/pdf/geophysica_1998_34_1-2_051_wahlstrom.pdf

The seismicity, fault distribution and stress pattern of northern Fennoscandia are investigated. Some active fault zones are suggested, e.g., several faults exposed to large displacement at the late-glacial phase about 9,000 years ago. Stress orientations, derived from crack distribution and a few earthquake focal-mechanism solutions, are different in different areas. In some cases there is a good agreement with expectations from ridge-push generated and propagated compressive stress. However, the inhomogeneity in the stress field of the region as a whole indicates contribution from local factors.