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Abstract

The aim of the present paper is to test intensity attenuation relationships for subcrustal earthquakes occurred in Vrancea (Romania) seismogenic zone in relation with some important dams situated in extra-Carpathian area. During centuries, the Romanian territory has been shaken by strong earthquakes, most of them being centered within Vrancea Zone, which is situated at the bending area of the South-Eastern Carpathians. Most of the zones from extra-Carpathian area are affected by the subcrustal seismic events, where many hydro-technical structures exist, being also exposed to earthquakes action. A detailed analysis of the intensity attenuation laws developed for subcrustal seismic sources was performed using the most recent and complete intensity datasets. We use an extended and combined intensity data including historical and modern, qualitative and quantitative data, i.e. a number of 11 earthquakes occurred during the period 1738-2009 with epicentral/maximum intensities ranging from VII-X MSK degrees, and magnitude Mw from 5.4 to 7.9. All the input data used for testing are resulted after the reevaluation and evaluation of the macroseismic effects produced by the seismic events included in the present study (8697 IDP). The selected attenuation laws were tested for different values of epicentral intensity and with reference to twelve and twenty four azimuthal directions. Besides the testing of the relationships, isoseismal maps based on the selected attenuation laws were accomplished, associated to the biggest possible earthquake (worst scenario) for the Vrancea subcrustal zone, also highlighting the calculated intensities in the selected dam sites. Brief description of the study and used methods. Brief description of the study and used methods.

Keywords

subcrustal earthquakes macroseismic intensity attenuation law dams

Article Details

Author Biographies

Dr. Angela Petruta Constantin, National Institute for Earth Physics

Dr. Angela Petruta Constantin is geophysicist engineer, senior researcher second degree. She has graduated the Faculty of Geology and Geophysics, Bucharest University (1997) and obtained her PhD in Earth Sciences, in 2011. The main fundamental research activities during the last years were primarily focused on the research in the fields of historical seismology, macroseismology, seismic hazard and risk, tsunami resilience and geomagnetism. She was principal investigator in three National Fundamental and Applied Research Projects. She participated with important individual contributions in the realization of more than 30 National Research Projects, and 6 International Projects. In the last years, her scientific results were published in 35 scientific papers (26 of them in ISI Journals), H index =5.

Dr. Elena Florinela Manea, National Institute for Earth Physics

Dr. Elena Florinela Manea is a young researcher at National Institute of Earth Physics, Romania, and her research activities are on seismic hazard and risk analysis, near-surface geophysics, surface wave seismology and numerical modeling of seismic ground motion (rapid estimation of ground motion - USGS ShakeMap and complex 3D wave propagation simulations).

Dr. Iren Adelina Moldovan, National Institute for Earth Physics

Dr. Iren Adelina Moldovan graduated the Faculty of Physics, Bucharest University in 1990. She took her PhD in the field of Earth Physics in 2002. Since 2016 she is the head of Research Development and Innovation in Earth Sciences Department, from INCDFP. The main fundamental research activities she was involved in are related to seismic hazard and risk assessment and earthquake forecasting and her main applied research activities were focused on the onset, development and optimization of a geophysical network needed for the complex monitoring of earthquakes related phenomena. She is author and coauthor of 34 scientific ISI papers (Hindex 6).

PhD Student Raluca Partheniu, National Institute for Earth Physics

PhD Student Raluca Partheniu graduated Geophysics in 2005 and she has an M. Sc. in Environmental Geological Engineering. In 2014 she started her Ph.D. at the Faculty of Geology and Geophysics, her paper title is “Black Sea tsunami modeling scenarios”. She is a young researcher, working for more than 8 years in our Institute, and is member of different national and international projects. She has expertise in tsunami modeling and in all activities related with that phenomena, seismic monitoring, macroseismology.

How to Cite
Constantin, A. P., Manea, E. F., Moldovan, I. A., & Partheniu, R. (2020). TESTING THE MACROSEISMIC INTENSITY ATTENUATION RELATIONSHIPS FOR VRANCEA (ROMANIA) SUBCRUSTAL EARTHQUAKES IN RELATION WITH DAMS SITUATED IN EXTRA-CARPATHIAN AREA. SWS Journal of EARTH and PLANETARY SCIENCES, 2(2), 17-34. https://doi.org/10.35603/eps2020/issue2.02

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