VÝJIMEČNÉ ZEMĚTŘESENÍ JV. OD POZNANĚ (POLSKO) ZAZNAMENANÉ 6. 1. 2012
Roč.19,č.1-2(2012)
On January 6, 2012, a moderate earthquake was observed in a region SE of Poznań (local magnitude ML = 3.6 according to Institute of Physics of the Earth, IPE). In this region, there haven‘t been known any historical earthquakes so far, and no natural seismic activity has been observed up to present. Similar rare occurrences of weak and moderate earthquakes were observed in a region near Kaliningrad in 2004 (sequence of events, local magnitude of strongest event being 5.0) and in south Moravia region near Znojmo in 2000 (local magnitude ML = 2.5). These facts show that even in seismically quiet regions occurence of weak to moderate seismic events (with value of magnitude ranging from 3 to 5) could be expected.
earthquake; macroseismic activity; Poland; Dolsk Fault
Badura, J. – Zuchiewicz, W. – Štěpančíková, P. – Przybylski, B. – Kontny, B. – Cacoń, S. (2007): The Sudetic Marginal Fault: A young morphotectonic feature at the NE margin of the Bohemian Massif, Central Europe. – Acta Geodynamica et Geomaterialia, 4, 4, 7–29. Praha.
Dadlez, R. (2006): The Polish Basin—relationship between the crystalline, consolidated and sedimentary crust. – Geological Quarterly, 50, 1, 43–58. Warszawa.
Dadlez, R. – Marek, S. – Pokorski, J. (ed.) (2000): Geological map of Poland without Cainozoic deposits, 1 : 1 000 000. – Państwowy Instytut Geologiczny, Warszawa.
Dadlez, R. – Grad, M. – Guterch, A. (2005): Crustal structure below the Polish Basin: Is it composed of proximal terranes derived from Baltica? – Tectonophysics, 411, 111–128. https://doi.org/10.1016/j.tecto.2005.09.004">https://doi.org/10.1016/j.tecto.2005.09.004
Guterch, B. (2009): Sejsmiczność Polski w świetle danych historycznych. – Przegląd Geologiczny, 57, 6, 513–520. Havíř, J. – Pazdírková, J. – Skácelová, Z. – Sýkorová, Z. (2001): Tektonická mikrozemětřesení registrovaná na Moravě a ve Slezsku v roce 2000. – Geologické výzkumy na Moravě a ve Slezsku v roce 2000, 105–108.
Husebye, E. S. – Mäntyniemi, P. (2005): The Kaliningrad, West Russia earthquakes on the 21st of September 2004—Surprise events in a very low-seismicity area. – Physics of the Earth and Planetary Interiors, 153, 227–236. https://doi.org/10.1016/j.pepi.2005.06.007">https://doi.org/10.1016/j.pepi.2005.06.007
Jarosiński, M. – Poprawa, P. – Ziegler, P. A. (2009): Cenozoic dynamic evolution of the Polish Platform. – Geological Quarterly, 53, 1, 3–26.
Malinowski, M. (2009): Structure of the crust/mantle transition beneath the Variscan foreland in SW Poland from coincident wide-angle and near-vertical reflection data. – Tectonophysics, 471, 260–271. https://doi.org/10.1016/j.tecto.2009.02.025">https://doi.org/10.1016/j.tecto.2009.02.025
Malinowski, M. – Grad, M. – Guterch, A. – Takács, E. – Śliwiński, Z. – Antonowicz, L. – Iwanowska, E. – Keller, G. R. – Hegedüs, E. (2007): Effective sub-Zechstein salt imaging using low-frequency seismics — Results of the GRUNDY 2003 experiment across the Variscan front in the Polish Basin. – Tectonophysics, 439, 89–106.
Špaček, P. – Sýkorová, Z. – Pazdírková, J. – Švancara, J. – Havíř, J. (2006): Present-day seismicity of the south-eastern Elbe Fault System (NE Bohemian Massif). – Studia geophysica et geodaetica, 50, 2, 233–258.
