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Title: LOCATION IMPROVEMENTS FOR THE TWIN CRUSTAL EARTHQUAKES RECORDED ON FEBRUARY 2023 IN GORJ COUNTY, ROMANIA
LOCATION IMPROVEMENTS FOR THE TWIN CRUSTAL EARTHQUAKES RECORDED ON FEBRUARY 2023 IN GORJ COUNTY, ROMANIA

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Mircea Radulian; Mihaela Popa; Raluca Dinescu; Andrei Bala
10.5593/sgem2023/1.1/s01.08
10.5593/sgem2023/1.1
1314-2704
978-619-7603-56-9
English
23
1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Geology
A significant seismic sequence started on 13 Feb. 2023 at 14:58 GMT with a mainshock of 5.2 ML located at 17 km depth and at 14 km distance NW from Targu Jiu city. The first shock was followed by 16 aftershocks with magnitudes between 2.1 and 3.4 after which a second mainshock of magnitude 5.7 was triggered next day, 14 Feb., at 13:16 GMT. The largest acceleration at the second shock (105.25 cm/s2) was recorded at Gura Zlata station as well.
The seismic events hypocenters are established by several methods. First two main shocks (with ML>5) are preliminary located using 10 seismic stations around the seismic zone. The second set of locations have as input data from seismic stations situated 100 km distance around the active area. The third set of locations are realized with all available Romanian seismic stations placed all over the country.
The third locations of the main shocks performed routinely by the National Institute for Earth Physics (NIEP), Romania, placed the two main shocks several kilometers to the south and out from the cloud of aftershocks. As shown in our analysis, this is an artifact when different sets of stations are used in location procedure that can be explained based on the difference between the lithosphere models in different parts of Romania and the simplified model used by NIEP for routinely determination of events location with Antelope program.
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This paper was carried out within project SETTING - Integrated thematic services in the field of Earth observation – a national platform for innovation, cofounded from the Regional Development European Fund (FEDR) through the Operational Competitivity Programme 2014–2020, Contract No. 336/390012 and was partially funded by the EENSANE (East European Ambient Seismic Noise) Project PN-III-P4-ID-PCE-2020- 2972 supported by UEFISCDI (Executive Agency for Higher Education, Research, Development and Innovation Funding), Romania and the NUCLEU Project PN233601/2023.
conference
https://doi.org/10.5593/sgem2023/1.1/s01.08
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Proceedings of 23rd International Multidisciplinary Scientific GeoConference SGEM 2023
23rd International Multidisciplinary Scientific GeoConference SGEM 2023, 03 - 09 July, 2023
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference-SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
57-64
03 - 09 July, 2023
website
8997
seismic sequence; crustal earthquakes; hypocenter location; ground acceleration, Southern Carpathians