Partitioning the Ongoing Extension of the Central Apennines (Italy): Fault Slip Rates and Bulk Deformation Rates From Geodetic and Stress Data

摘要: We investigated whether the joint inversion of geodetic and stress direction data can constrain long-term fault slip rates in central Apennines, ultimately how extension is partitioned among bulk lithosphere permanent strain Geodetic velocities are collected interseismic stage with steady secular deformation;thus, estimates be derived a model elastically unloading seismogenic faults within viscously deforming As average spacing Global Navigation Satellite Systems (GNSS) stations similar to length (25?35 km), if not larger, we decided merge temporary GNSS measurements, resulting denser set Given that most normal Apennines have around or below 1 mm/a, campaign carry uncertainties, simple local back models cannot applied More sophisticated modeling required extract reasonable deformation at signal-to-noise ratio order unity spatial distribution network, estimated rate seven major systems satisfactory agreement available geological The locally fits short-term transients;in other cases, they represent currently unclear signature tectonic processes like upper-crustal viscoplastic aseismic slip, indicate missing adopted database conclude time ripe for determining using data, particularly where activity hard determine geologically