Srdečně Vás zveme na online přednášku Christiana Sippla (GFÚ) a Marcose Morena (U. Concepción), která proběhne v pátek 16.10.2020 od 14 hodin. K přednášce je třeba se přihlásit na tomto odkaze. Přednáška proběhne v anglickém jazyce.
Most large, destructive earthquakes worldwide occur in subduction zones, and mostly along the plate interface, where upper and downgoing plate are in direct contact. Monitoring of surface deformation with GPS geodesy is often used to identify so-called ”asperities”, patches of higher frictional strength on the plate interface, where stress accumulates to be eventually released in a large earthquake. However, the spatial resolution that can be obtained from such GPS analysis is rather low. Analyzing microearthquakes from the Central Chile subduction zone, we found their locations outline half-ellipses that may correspond to asperities. If this were true, we could define active asperities with much higher resolution. In this presentation, microseismicity results will be evaluated against GPS observations and numerical modelling results, in order to check the hypothesis that they outline asperities.
Další informace: http://geo.mff.cuni.cz/seis_sem.htm
