Peer-reviewed articles 17,970 +


Title: REGION-TIME-MAGNITUDE ANALYSES OF EARTHQAUKE ACTIVITY IN THE ELBASANI GEOTERMAL ZONE, ALBANIA
REGION-TIME-MAGNITUDE ANALYSES OF EARTHQAUKE ACTIVITY IN THE ELBASANI GEOTERMAL ZONE, ALBANIA

PlumX Article Metrics by Elsevier
Rrapo Ormeni; Serkan Ozturk; Albana Hasimi; Erald Silo; Elvin Como
10.5593/sgem2023/1.1/s05.71
10.5593/sgem2023/1.1
1314-2704
978-619-7603-56-9
English
23
1.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Applied and Environmental Geophysics
A detailed analysis of the b-value within the Elbasani fault zone, Albania, were studied. From instrumental seismicity in this area have been located 1830 seismic events, with magnitude Ml>0.5 Richter. In the zone of Elbasani, hot mineral water (thermal waters) spot out from natural springs which have been known since the 19th century. The statistical properties of seismicity are analysed by using b-value known as Gutenberg- Richter law. The magnitude of completeness (Mc) value is determined as 2.6, and the bvalue is calculated as 1.03 ± 0.06, and it is determined that the region has a normal stress level. It is seen that the Mc-value varies from 1.6 to 2.9, the b-value changes between 0.9 and 1.3. The regions with the large b-values (> 1.0) are estimated in the eastern parts of the of Elbasani zone. However, the regions with the low b-values (< 1.0) are observed in the north, west and southwest of Elbasani zone. The regions with the small b-values correspond to great-magnitude events, whereas the other large values are related to smallmagnitude earthquakes. These results reveal that b-values for all regions are well represented by a b-value typically close to 1.0. There are clear decreasing trends in temporal changes of b-values before the occurrences of some strong main shocks. The lower b-value indicate that there is still moderate stress accumulation in the southwest area of the Llinxha-Kozan thermal water belt. The b-values smaller than 1.0 indicate potential future earthquake area. Following the strong events, there are remarkable decreases in b-value as a function of time. Changes in b-value with time varies in a large band between 0.6 and 1.4. Probabilities of earthquake activity in different magnitude sizes show comparatively great values changing from 50-100 % for earthquakes of 0.5 ? Ml ? 4.5 and the values relatively lower than 90 % for the earthquakes of 5.0 ? Ml. The Elbasani zone has a complex geological structure with a significant number of geothermal water resources and some features of seismicity.
[1] Aki, K., 1965. Maximum likelihood estimate of b in the formula bM a N ? = log and its confidence limits. Bull Earthquake Res Inst Tokyo Univ 43:237-239.
[2] Ali, S.M., 2016. Statistical analysis of seismicity in Egypt and its surroundings. Arab. J. Geosci., 9, 52.
[3] Aliaj Sh, Kociu S, Muco B, Sulstarova E. 2010. Seismicity, seismotectonic and seismic hazard assessment in Albania. Published by Albanian Academy of Sciences.
[4] Frohlich, C., Davis, S., 1993. Teleseismic b-values: Or, much ado about 1.0. J. Geophys. Res., 98(B1), 631-644.
[5] Gutenberg, B., Richter, F., 1944. Frequency of earthquakes in California. B. Seismol. Soc. Am., 34, 185-188.
[6] Institute of Geosciences, Energy, Water and Environment (2019). “Monthly seismological bulletin and earthquakes catalogs of Albania”. www.geo.edu.al, Archive of IGEO
[7] Mazzoli, S. & Helman, M., 1994. Neogene patterns of relative plate motion for Africa- Europe: some implications for central Mediterranean tectonics. Geologische Rundschau, 83, 464-468.
[8] Mogi, K., 1962. Magnitude-frequency relation for elastic shocks accompanying fractures of various materials and some related problems in earthquakes. Bulletin of the Earthquake Research Institute, Tokyo University, 40, 831-853.
[9] Ormeni Rr, Kociaj S, Fundo A, Daja Sh, Doda V (2013). "Moderate earthquakes in Albania \ during 2009 and its associated seismogenic zones", Italian Journal of Geosciences, Vol 132, Nr2, 2013, Italy.
[10] Ormeni Rr, Ozturk S, Fundo A, Kemal C (2017). “Spatial and temporal analysis of recent seismicity in different parts of the Vlora-Lushnja- Elbasani-Dibra Transversal Fault Zone, Albania” Austrian Journal of Earth Sciences, International Journal of the Austrian Geological Society.
[11] Ozturk, S., 2013. A statistical assessment of current seismic quiescence along the North Anatolian Fault Zone: Earthquake precursors. Austrian Journal of Earth Sciences, 106, 4-17.
[12] Polat, O., Gok, E. and Y?lmaz, D., 2008. Earthquake hazard of the Aegean Extension region (West Turkey), Turkish Journal of Earth Sciences, 17, 593-614.
[13] Radziminovich, N.A., Miroshnichenko, A.I., Zuev, F.L. 2019. Magnitude of completeness, b- value, and spatial correlation dimension of earthquakes in the South Baikal Basin, Baikal Rift System. Tectonophysics 759, 44-57.
[14] Scholz, C.H., 2015. On the stress dependence of the earthquake b value. Geophys. Res. Lett., 42, 1399-1402.
[15] Utsu, T., 1971. Aftershock and earthquake statistic (III): Analyses of the distribution of earthquakes in magnitude, time and space with special consideration to clustering characteristics of earthquake occurrence (1). Journal of Faculty of Science Hokkaido University Series VII (Geophysics) 3, 379-441.
[16] Wiemer, S., Wyss, M., 2000. Minimum magnitude of completeness in earthquake catalogs: Examples from Alaska, the Western United States, and Japan. B. Seismol. Soc. Am., 90(3), 859- 869.
[17] Wiemer, S., 2001. A software package to analyze seismicity: ZMAP. Seismological Research Letters, 72(3), 373-382.
[18] Zuniga, F.R., Lacan, P., Rodriguez-Perez, Q., Marquez-Ramirez, V.H. 2020. Temporal and spatial evolution of instrumented seismicity in the Trans-Mexican Volcanic Belt. Journal of South American Earth Sciences 98, 102390.
The authors are very grateful to the National Agency for Scientific Research and Innovation (NASRI) of Albania for financial support, which made the publication possible of this study.
conference
https://doi.org/10.5593/sgem2023/1.1/s05.71
Download PDF
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.
589-600
03 - 09 July, 2023
website
9060
Seismicity, b-value, probability, recurrence time, tectonic stress