5 research outputs found
GPS-measurements of recent crustal deformation in the junction zone of the rift segments in the central Baikal rift system
No full textEstimation of the Recurrence Period of Strong Earthquakes in Zones of the Main Sayan and Tunka Faults according to the Data of Radiocarbon Dating and Statistical Analysis
No full textEvaluation of present-day deformations in the Amurian Plate and its surroundings, based on GPS data
No full textSeismic wave attenuation in the lithosphere of the North Tanzanian divergence zone (East African rift system)
No full textInternational audienceThe seismic effective quality factor (QC) and its frequently dependences or the frequency parameter (n) and attenuation coefficient (δ) for the Earth’s crust and upper mantle of the North Tanzanian divergence zone (East African rift system) were estimated from an analysis of the earthquake coda waves recorded in the SEISMO-TANZ’07 French-Tanzanian seismic experiment. The QC values increase and the n and δ values decrease with increasing frequency and length of the lapse time window. This behavior of the attenuation parameters may be evidence that the degree of heterogeneity of the lithosphere decreases with depth. Comparison of the depth variations in the attenuation coefficient δ and the frequency parameter n with the velocity structure of the region shows that there is a distinct change in the behavior of seismic wave attenuation at velocity discontinuities. The obtained attenuation parameters were compared with the same parameters obtained in our previous studies for other continental rift systems—the Baikal rift system (Eurasia) and the Basin and Range Province (North America)
