Summary of papers

The following sections summarize the four papers upon which this thesis is founded. I will briefly introduce each paper's raison d'être, summarize the methods developed and/or data analyzed in the paper and finally give some concluding remarks on the results of the paper. Paper I estimates the crustal state of stress from two deep boreholes in Siljan, Sweden whereas Paper II, III and IV use microearthquakes, recorded by the Icelandic SIL network, to estimate the stress state.