[S05-P] Poster

[S05-P-06] ROMANIAN NETWORK OF ANALOG SEISMOGRAMS: CONTRIBUTION TO IMPROVE GLOBAL EARTHQUAKE CATALOGS

Daniel Nistor Paulescu^{1, 2}, Eugen Oros¹, Mircea Radulian^1,2,3, ^○Elena Manea¹ (1.National Institute for Earth Physics, Magurele, Romania, 2.University of Bucharest Faculty of Physics,Magurele, Romania, 3.Academy of Romanian Scientists, Bucharest, Romania)

Romania has a long tradition in recording and investigating seismic events. The first historical instrumental recordings are available starting with 1902. Since then, the number of analog stations has continuously increased reaching in 50' a number of 7 observatories equipped with different seismographs with recordings on black paper, photo paper and ink paper. After the major earthquake of 4 March 1977, benefiting from UNDP-UNESCO assistance, the national network was improved with a telemetric network of 15 seismic stations with data recorded on paper.
Over time, Romania analogue network provided and exchanged seismic data (bulletins, seismograms, reports) with international agencies (International Seismological Summary, International Seismological Centre, National Earthquake Information Center, National Earthquake Information Service) and participated with a significant number of analog seismograms recorded at strong earthquakes in Europe to the international projects EUROSEISMOS, SISMOS and NERIES. Recently, in addition to the classic archive of analogue recordings, a modern digital database has been created in the National Institute for Earth Physics (http://archive.infp.ro/). Until now, over 200000 seismograms have been scanned. With the new digitization and vectorization software which is now available, the source parameters can be reconsidered.