eprintid: 1627 rev_number: 22 eprint_status: archive userid: 5 dir: disk0/00/00/16/27 datestamp: 2015-10-07 11:17:00 lastmod: 2020-03-24 08:47:24 status_changed: 2015-10-07 11:17:00 type: article metadata_visibility: show creators_name: Van Giang, Nguyen creators_name: Wiszniowski, Jan creators_name: Plesiewicz, Beata creators_name: Lizurek, Grzegorz creators_name: Van, Dinh Quoc creators_name: Khoi, Le Quang creators_id: jwisz@igf.edu.pl creators_id: lizurek@igf.edu.pl corp_creators: Institute of Geophysics, Hanoi, Vietnam corp_creators: Institute of Geophysics, PAS, Warsaw, Poland corp_creators: Institute of Geophysics, PAS, Warsaw, Poland corp_creators: Institute of Geophysics, PAS, Warsaw, Poland corp_creators: Institute of Geophysics, Hanoi, Vietnam corp_creators: Institute of Geophysics, Hanoi, Vietnam title: Some Characteristics of Seismic Activity in the Song Tranh 2 Reservoir, Quang Nam, Vietnam by Local Seismic Network Data subjects: RV2 subjects: SR divisions: EPOS-ESI5 full_text_status: none keywords: Reservoir Induced Seismicity, Seismic Network, Source Parameters, Focal Mechanism, Completed Catalogue abstract: The Song Tranh 2 hydropower construction is located in the Quang Nam province (central Vietnam), it has a reservoir volume of 740 million cubic meters of water and a dam height of 96 m. The reservoir was filled to capacity for the first time in February 2011 to about 160m, then it dropped to 140 m in July 2011. The filling of reservoir started again in August 2011 and the maximum water level of 175 m was reached in October 2011. Song Tranh 2 and its surrounding regions suffered from earthquakes in March 2011, it also suffered from a higher magnitude earthquake in October and November, 2012 of M=4.6 and 4.7 respectively. By the end of 2012, a seismic network including 6 stations was set up around the Song Tranh 2 reservoir area and a full network of 10 stations was set up by August 2013. The final seismic network is capable of detecting and locating weaker seismic earthquakes. It is also possible to calculate the extended source parameters like focal mechanism, slip direction etc. In the period from August 2013 to May 2014 about 2000 seismic events were detected, and 359 of them were localized and magnitudes were calculated. Seismic analysis and update catalogues are currently being conducted. The LocSAT application was used to locate events, to perform hypocentral inversion of the phase arrival data, to estimate the origin time, epicentral location, and depth by registered data from the VERIS network. Mechanism solutions with P-wave amplitude inversion of three events were determined. It suggests that reservoir construction is a major factor in the seismogenic process. date: 2015-06-01 date_type: published publication: Earth Sciences volume: 4 number: 3 pagerange: 101-111 id_number: doi:10.11648/j.earth.20150403.13 issn: 2328-5974 official_url: http://dx.doi.org/10.11648/j.earth.20150403.13 access_IS-EPOS: limited owner: Publisher citation: Van Giang, Nguyen and Wiszniowski, Jan and Plesiewicz, Beata and Lizurek, Grzegorz and Van, Dinh Quoc and Khoi, Le Quang (2015) Some Characteristics of Seismic Activity in the Song Tranh 2 Reservoir, Quang Nam, Vietnam by Local Seismic Network Data. Earth Sciences, 4 (3). pp. 101-111. DOI: https://doi.org/10.11648/j.earth.20150403.13