Studies of Historical Earthquakes in Southern Poland

Guterch, Barbara; Kozák, Jan

doi:10.1007/978-3-319-15446-6

GeoPlanet: Earth and Planetary Sciences

2015

DOI: 10.1007/978-3-319-15446-6

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Studies of Historical Earthquakes in Southern Poland

Barbara Guterch¹,

Jan Kozák²

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Cited by 3 publications

References 18 publications

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Seismic hazard assessment in the Podhale region, Poland—zone and smoothed seismicity approach

Plesiewicz,

Wiszniowski,

Karkowska

et al. 2024

Acta Geophys.

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Poland is characterised by weak natural seismicity. However, the last analysis of the natural seismic hazard in the country was carried out 24 years ago. Therefore, a significant fraction of the recorded seismicity is not included in the hazard estimates currently used, either because recent observations are not taken into account or because of improved seismic network capabilities. Furthermore, Podhale, in the Tatra Mountains, is the only region with recorded permanent natural seismicity. This study aims to create new seismic hazard maps of the Podhale region from a newly compiled database containing information on historical events and two complete instrumental catalogues (regional and local), each at a different level of completeness. The local catalogue was recorded over the last few years. Two seismic hazard assessment techniques were applied, namely the conventional (zone-based) (Cornell in Bull Seismol Soc Am 58(5): 1583–1606, 1968) and the smoothed seismicity model, based on the spatial distribution of seismicity. The earthquake recurrence parameters were estimated using the methodology developed by Kijko et al. (Bull Seismol Soc Am 106: 1210–1222, 2016). The new seismic hazard model incorporates several improvements, such as a comprehensive logic tree and a new set of ground motion models. The new maps provide a more detailed assessment of the seismic hazards of the investigated area. Moreover, they predict higher PGA than previous seismic hazard maps covering Podhale, like global European Seismic Hazard Maps 2013 and 2020.

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Seismic hazard assessment in the Podhale region, Poland—zone and smoothed seismicity approach

Plesiewicz,

Wiszniowski,

Karkowska

et al. 2024

Acta Geophys.

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Mining-triggered seismicity governed by a fold hinge zone: The Upper Silesian Coal Basin, Poland

Mendecki

Szczygieł

Lizurek

et al. 2020

Engineering Geology

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A Hydrofracturing-Triggered Earthquake Occurred Three Years after the Stimulation

et al. 2022

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Hydrofracturing, used for shale gas exploitation, may induce felt, even damaging earthquakes. On 15 June 2019, an Mw2.8 earthquake occurred, spatially correlated with the location of earlier exploratory hydrofracturing operations for shale gas in Wysin in Poland. However, this earthquake was atypical. Hydrofracturing-triggered seismicity mainly occurs during stimulation; occasionally, it continues a few months after completion of the stimulation. In Wysin, there were only two weaker events during two-month hydrofracturing and then 35 months of seismic silence until the mentioned earthquake occurred. The Wysin site is in Gdańsk Pomerania broader region, located on the very weakly seismically active Precambrian Platform. The historical documents, covering 1000 years, report no natural earthquakes in Gdańsk Pomerania. We conclude, therefore, that despite the never observed before that long lag time after stimulation, the Mw2.8 earthquake was triggered by hydrofracturing. It is possible that its unusually late occurrence in relation to the time of its triggering technological activity was caused by changes in stresses due to time-dependent deformation of reservoir shales. The Wysin earthquake determines a new time horizon for the effect of HF on the stress state, which can lead to triggering earthquakes. Time-dependent deformation and its induced stress changes should be considered in shall gas reservoir exploitation plans.

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Studies of Historical Earthquakes in Southern Poland

Cited by 3 publications

References 18 publications

Seismic hazard assessment in the Podhale region, Poland—zone and smoothed seismicity approach

Seismic hazard assessment in the Podhale region, Poland—zone and smoothed seismicity approach

Mining-triggered seismicity governed by a fold hinge zone: The Upper Silesian Coal Basin, Poland

A Hydrofracturing-Triggered Earthquake Occurred Three Years after the Stimulation

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