Electrical-sedimentary anisotropy of landforms adjacent to postglacial faults in Lapland

The cyclic nature of glaciations and related postglacial faulting represents a risk for the deep geological disposal of spent nuclear fuel in areas likely to be affected by future glaciations. Seismic history was therefore studied by means of detecting geomorphological structures on airborne laser scanning digital elevation models and underground by excavating in an esker and trenching across a postglacial fault located in northern Fennoscandia. OLS dating and assessing the geomorphological structures was used for timing of the seismic history. The results suggest that the faulting of different segments in the Pasmajärvi complex is due to at least two late Weichselian events, which probably occurred both subglacially and postglacially. The most reliable input for the moment magnitude estimates was vertical slip profiles, and therefore these estimates (MW ≈ 6.4–6.9) are suggested. © 2020 John Wiley & Sons, Ltd.

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Geomorphological evidence of paleoseismicity: Surficial and underground structures of Pasmajärvi postglacial fault

Markovaara‐Koivisto

Ojala

Mattila

et al. 2020

Earth Surf Processes Landf

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Post-Younger Dryas fault instability and deformations on ice lineations in Finnish Lapland

2019

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Machine learning-based mapping of micro-topographic earthquake-induced paleo-Pulju moraines and liquefaction spreads from a digital elevation model acquired through laser scanning

et al. 2020

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Electrical-sedimentary anisotropy of landforms adjacent to postglacial faults in Lapland

Cited by 13 publications

References 41 publications

Geomorphological evidence of paleoseismicity: Surficial and underground structures of Pasmajärvi postglacial fault

Geomorphological evidence of paleoseismicity: Surficial and underground structures of Pasmajärvi postglacial fault

Post-Younger Dryas fault instability and deformations on ice lineations in Finnish Lapland

Machine learning-based mapping of micro-topographic earthquake-induced paleo-Pulju moraines and liquefaction spreads from a digital elevation model acquired through laser scanning

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