Earthquakes and Associated Phenomena in the Alpide Belt

Abstract

The distribution of earthquakes at depths less than 300 km., of active volcanoes, and of gravity anomalies in the Alpide belt of Eurasia shows relation to structural arcs analogous to that in the Circum Pacific belt. Shocks deeper than 300 km. are still unknown outside the Pacific belt. Where shocks at intermediate depths (70-300 km.) occur, they are most frequent near active volcanoes or sharp bends in the structures and are correlated with positive gravity anomalies.