Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufm.s23e0204k&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #S23E-0204
Astronomy and Astrophysics
Astronomy
1217 Time Variable Gravity (7223, 7230), 7200 Seismology, 7212 Earthquake Ground Motions And Engineering Seismology, 7223 Earthquake Interaction, Forecasting, And Prediction (1217, 1242), 8124 Earth'S Interior: Composition And State (1212, 7207, 7208, 8105)
Scientific paper
With new developments in Albania a new Tirana-Durres metropolitan area, is going to be the most important inhabited region in Albania, where more than 1/3 of the population of the country is concentrated (about 1 million people). Two biggest cities situated at both ends of this area: Tirana (capital) and Durres (biggest port of the country) nowadays are going to be linked together through a narrow corridor of 40km length, as a great metropolitan area. The new developments have to take into consideration the seismic risk reduction of expected strong ground motions for a sustainable development of this area. Durres City (antique name Durrachium), situated at western extremity of metropolitan area, represents one of the oldest cities. During its long history of civilization the city suffered from strong earthquakes. One of the strongest earthquakes was the earthquake of the 1273-year, after which inhabitants of Durres were forced to leave the city and settle at Berat. The latest disastrous earthquake was that of December 17, 1926(M=6.2, Io= IX). Taking into account its tectonic setting, on Adriatic seacoast, there is of interest the experiences got by big Albania-Montenegro earthquake of April 15, 1979 (Ms=6.8, Io=IX+). Tirana City situated at eastern extremity of metropolitan area is characterized by moderate seismic activity, with observed earthquake with magnitude less than M=6.0. As results of seismic microzonation of this area, the expected strong ground motions through spectral characteristics and seismic intensities and expected dynamic soil instabilities are presented: Durres City, situated on Durres bay on Adriatic coast, on very poor thick Quaternary sediments and weathered hills of Tortonian age , represents one of the most dangerous areas of coastal zone in Albania ( with highest expected seismic intensities and PGA values) , with a lot of problems concerning expected seismic strong ground motions and soil instabilities as: -Induced liquefaction phenomena on poor sandy deposits of Durres lagoon and Durres Bay area. -New and induced landslides, Tirana City, the capital of Albania, situated at eastern extremity of metropolitan area, represents an area where expected seismic hazard has to be taken into consideration concerning: -The local site conditions: poor layers of former swamps with shallow underground water level, -The characteristics of active faults surrounding the City or just beneath it, -The underground topography (steep slopes and sharpness) of base rocks. The results of studies carried out, were checked by the consequences of a moderate earthquake of January 9, 1988 (M=5.5, Io=VII+) that hit Tirana City.
Kociu S.
Skrami J.
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