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SEISMOLOGICAL ANALYSIS OF THE SWARM TYPE SEISMICITY IN THE REGION OF VELINGRAD, BULGARIA

Stela Simeonova, Plamena Raykova, Dimcho Solakov

First published: 2022-11-15https://doi.org/10.5593/sgem2022/1.1/s05.065View metrics

Abstract

-he space-time distribution of earthquakes is of substantial importance for understanding the physics of the earthquake generation process. Earthquakes can be analyzed as a time series of events that result from the released strain in the earth's crust. The study of the space-time distribution of earthquakes using statistical methods reveals many of their characteristics. Sequences of seismic events affect both spatial and time distribution of earthquakes. It is necessary to know the statistical characteristics of the different seismic clusters and to reflect their impact in the general research related to seismicity. In the study, we analyze the swarm type sequence located in the vicinity of the town of Velingrad. The region is characterized with moderate seismic activity. Moreover, a reduced number of small earthquakes have also been registered in the recent past. About 30 events with magnitude in the range of 1.2?M?3.0 are recorded at Bulgarian seismological network in a time period of 10 days. The events are localized on and close to a defined fault structure. Most of the swarm events are with a magnitude in the range of 2.0-2.5. The earthquakes are located in the Earth-s crust at a depth up to 15 km. Rapid transition to background seismicity is observed after the generation of the strongest earthquakes in of the sequence.

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Title
SEISMOLOGICAL ANALYSIS OF THE SWARM TYPE SEISMICITY IN THE REGION OF VELINGRAD, BULGARIA
Authors
Stela Simeonova, Plamena Raykova, Dimcho Solakov
Proceedings
SGEM International Multidisciplinary Scientific GeoConference- EXPO Proceedings; 22nd SGEM International Multidisciplinary Scientific GeoConference Proceedings 2022, Science and Technologies in Geology, Exploration And Mining
Publisher
STEF92 Technology
Year
2022
Pages
559-566
SWS Citekey
Simeonova20225559566
ISSN
1314-2704
ISBN
978-619-7603-38-5
Language
en
Publication type
Conference Paper
Proceedings contents
Open official contents
Keywords
seismicitysequencesswarmtown of Velingrad
References13

  1. Credner, H., Das vogtlandisch-erzgebirgische Erdbeben vom 23. November 1875, Z. Ges. Naturwiss, 48, 246�269, 1876.

  2. Mogi, K., Some Discussions on Aftershocks, Foreshocks and Earthquake SwarmsThe Fracture of a Semi-Infinite Body Caused by an Inner Stress Origin and Its Relation to the Earthquake Phenomena (Third Paper), Bulletin of the Earthquake Research Institute, 41, 615-658, 1963.

  3. Dreger, D.S., Tkalcic, H., Jonston, M., Dilational processes accompanying earthquakes in the Long Valley Caldera, Science 288, 122�125, 2000. DOI: 10.1126/science.288.5463.122

    View DOICrossrefGoogle ScholarWeb of ScienceScopusOpenCitations

  4. Lees, J.M., Multiplet analysis at Coso geothermal, Bull. Seismol. Soc. Am. 88, 1127� 1143, 1998. DOI: 10.1785/bssa0880051127

    View DOICrossrefGoogle ScholarWeb of ScienceScopusOpenCitations

  5. Wyss, M., Shimazaki, K., Wiemer, S., Mapping active magma chambers by b values beneath the off-Ito volcano, Japan. J. Geophys. Res, 102 (B9), 20,413�20,422, 1997. DOI: 10.1029/97jb01074

    View DOICrossrefGoogle ScholarWeb of ScienceScopusOpenCitations

  6. Watzof S., Earthquakes in Bulgaria during XIX century, Central Meteor. St., Imprimerie de I�Etat, Sofia, pp. 93, 1902.

  7. Raykova Pl. Characteristics of for-aftershock and swarm type activity for the territory of Bulgaria and surroundings. Ph.D thesis, NIGGG-BAS, S., pp. 47, 2017.

  8. Gutenberg, B. and Richter, C. F., Frequency of earthquakes in California, B. Seismol. Soc. Am., 34, 185�188, 1944. DOI: 10.1785/bssa0340040185

    View DOICrossrefGoogle ScholarWeb of ScienceScopusOpenCitations

  9. Sykes, L. R., Earthquake swarms and sea-floor spreadings, J. Geophys. Res., 75, 6598- 6611, 1970. DOI: 10.1029/jb075i032p06598

    View DOICrossrefGoogle ScholarWeb of ScienceScopusOpenCitations

  10. Ibs-von Seht, M., Plenefisch, T., Klinge, K., Earthquake swarms in continental rifts - A comparison of selected cases in America, Africa and Europe, Tectonophysics, 452, 66�77, 2008. DOI: 10.1016/j.tecto.2008.02.008

    View DOICrossrefGoogle ScholarWeb of ScienceScopusOpenCitations

  11. GFI Report, Seismic zoning of the Republic of Bulgaria in accordance with the requirements of Eurocode 8 "Seismic provision of building structures" and development of maps for seismic zoning taking into account seismic hazard for the country, Part II, BAS, Geophysical Institute, Sofia, pp. 150, 2008.

  12. Popova M., Oynakov E., Milkov Y., Buchakchiev V., Dragomirov D., Seismicity on the territory of Bulgaria and the adjacent lands recorded by NOTSSI in 2021, Bulgarian Geophysical Journal, 2020, Vol. 44, Bulgarian Academy of Sciences, -, 2021.

  13. Christoskov L., Dimitrova L., Solakov D., Digital broadband seismometers of NOTSSI for practical magnitude determinations of P waves, BGS, Comptes Rendus de L'Academie Bulgare des Sciences, 65 (5), 653-660, 2012.

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