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Ghica Daniela

National Institute for Earth Physics


Authors: Daniela Ghica (National Data Centre, National Institute for Earth Physics), Constantin Ionescu (National Institute for Earth Physics) and Mihaela Popa (National Data Centre, National Institute for Earth Physics)
During the second half of 2016, the infrasound monitoring network in Romania was developed by deployment of two new stations, in addition to IPLOR, the 6-element acoustic array installed at Plostina by National Institute for Earth Physics (NIEP). The first station, BURARI infrasound research array, consists of four elements installed in late July 2016 in the northern part of Romania, in Bucovina region, under a joint effort of Air Force Technical Application Center AFTAC (USA) and NIEP. BURARI elements, sited in vicinity of the central elements of BURAR seismic array (1.2 km aperture) are equipped with Chaparral Physics Model 21 microbarometers and Reftek RT 130 data loggers. The data are used primarily for research purposes within the scientific collaboration project between NIEP and AFTAC, but they could be also provided to the infrasound experts interested, i.e. ARISE community. The second new infrasound array is a PTS portable four-element array (I67RO), which has been deployed in the end of September 2016, for one year, within a collaboration project between NIEP and the Provisional Technical Secretariat of the Preparatory Commission for the CTBTO. This array, located in the western part of Romania, at Marisel (Cluj County), covers a 0.9 km aperture and is equipped with CEA/DAM MB2005 microbarometers and Reftek RT 130 data loggers. As mentioned in the collaboration letter signed by the International Data Centre (IDC) director, this NIEP-PTS joint experiment aims to contribute both to advanced understanding of infrasound sources in Central-Europe and to ARISE design study project, as an expansion of the spatial coverage of the European infrasound network. We present the results of processing of the data recorded by the new infrasound arrays deployed in Romania. CEA/DASE PMCC algorithm embedded in DTK-GPMCC (extended CTBTO NDC-in-a-box) was applied to obtain the detection arrival bulletins for each station. DTK-DIVA software (extended CTBTO NDC-in-a-box) was used to plot and analyze the results, in order to assess station detectability and the capacity of fusing detections into support of infrasound monitoring activity at NIEP.

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