Dr. Eugen OROS
Rezumat
Zona Timisoara este situata in centrul Regiunii Seismice Banat, cea mai importanta regiune
seismica a Romaniei, daca ne raportam la hazardul seismic controlat de cutremure crustale (adancimea
focarelor mai mica de cca 30 km). Istoria seismica a zonei este marcata de seisme cu magnitudini maxime
Mw = 5.6, care au provocat daune materiale semnificative fondului construit, atat in municipiul Timisoara cat
si in localitatile invecinate. Seismicitatea zonei este caracterizata prin grupari ale epicentrelor in arii bine
definite, corelate cu un complex sistem de falii crustale rectivate intr-un regim tectonic transtensiv. Seismele
produse in perioada Ianuarie-Februrie 2012 confirma caracterul seismic activ al sistemului de falii geologice
dezvoltat in apropierea orasului Timisoara si importanta acestuia pentru evaluarea si reducerea hazardului si
riscului seismic al orasului Timisoara si al localitatilor invecinate acestuia. Pentru perioade de recurenta
specifice codurilor antiseismice national (P-100/2006) si european (Eurocode EC8) hazardul seismic al zonei
seismogene Timisoara este definit de intensitatea I = 7.0 EMS si respectiv I = 7.5 EMS.
Cuvinte cheie: cutremure de pamantfaliiseismotectonicahazard seismicefecte locale
Abstract
Timi?oara zone develops within Banat Seismic Region, one of the most seismic active regions of
Romania when we consider the seismic hazard controlled by crustal seismicity (focal depths less then 30 km).
Historical, the city of Timi?oara and its neighbouring localities experienced more strong earthquakes, Mw=5.6,
that produced significant effects on the bulidings. The seismicity is characterized by proups of epicenters well
corelated with a complex geological faults system reactivated in a transtensiv tectonic regim. The earthquakes
occured between January and February 2012 confirm the seismic activitiy of the geological faults near
Timi?oara and thei importance for assessing the hazard and risk for Timi?oara zone. For recurrence periods
defined by national (P-100/2006) and European antiseismic (EuroCode EC8) codes the seismic hazard for
Timi?oara zone is defined by intensity I=7.0 EMS and I=7.5 EMS, respectively
Keywords: earthquakesfaultsseismotectonicsseismic hazardlocal effects
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