دانلود رایگان مقاله انگلیسی زلزله افقی غیر منتظره آزاده شده با گسیختگی هولوسن در گسل کنچری ( یونان مرکزی) - الزویر 2018

abstract

High-resolution elevation models, palaeoseismic trenching, and Quaternary dating demonstrate that the Kenchreai Fault in the eastern Gulf of Corinth (Greece) has ruptured in the Holocene. Along with the adjacent Pisia and Heraion Faults (which ruptured in 1981), our results indicate the presence of closely-spaced and parallel normal faults that are simultaneously active, but at different rates. Such a configuration allows us to address one of the major questions in understanding the earthquake cycle, specifically what controls the distribution of interseismic strain accumulation? Our results imply that the interseismic loading and subsequent earthquakes on these faults are governed by weak shear zones in the underlying ductile crust. In addition, the identification of significant earthquake slip on a fault that does not dominate the late Quaternary geomorphology or vertical coastal motions in the region provides an important lesson in earthquake hazard assessment.

6. Conclusions

High-resolution elevation models and a palaeoseismic trench demonstrate that the Kenchreai Fault has been active in the Holocene. The presence of parallel, simultaneously active, and closely spaced normal faults indicates that the strain accumulation on the faults is likely to be governed by the existence of weak shear zones in the underlying ductile crust. Faults that appear subservient or inactive in the geomorphology can represent significant sources of earthquake hazard.