Upward Motion Of Earthquake Hypocenters In The Wadati-benioff Seismic Zones

摘要

Vertical migration of hypocenters of earthquakes (EQ) in the Wadati-Benioff focal zones is proved by special data processing. Migration is related to the ascent of earthquake hypocenters from the depths of the upper mantle (600-700 km) to the Earth's crust level. The total time of fluid ascent in the Tonga-Bougainville and Java-Sumatra zones is equal to 5.5-6 and 10-11 yr, respectively. This fact is important for explaining EQ triggering in the subduction regions and rift zones.