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. 2014 Mar 19;14(3):5459–5469. doi: 10.3390/s140305459

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© 2014 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 4. — Examples of the rotational seismic events recorded in Książ, Poland, in 2011–2013 by AFORS-1with different detection frequency bands ΔB; (a) Plot of event recorded on 11 March 2011 at 8 h 46 min. (after the Honshu earthquake M = 9.0 on 11 March 2011 at 5 h 46 min. 23 s UT); (b)–(c) Selected events recorded in the last two mounts which source is the regional seismic mining events of the magnitude of M = 2.3–3.3, which occurred in the Lubin area (the Legnica-Głogów Copper Mining District, in the Western Poland).