Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Wojciech Gajek"'
Publikováno v:
Communications Earth & Environment, Vol 2, Iss 1, Pp 1-8 (2021)
Daily variations in seismic S-wave anisotropy reveal the dynamic response of englacial fractures to changing meltwater supply, according to shear wave splitting measurements from a seismometer network on the Rhonegletscher, Switzerland.
Externí odkaz:
https://doaj.org/article/664e22c59fda4dd7b04acc7e9fe4ee6c
Autor:
Artur Marciniak, Mariusz Majdański, Sebastian Kowalczyk, Justyna Cader, Adam Nawrot, Bartosz Owoc, Iwona Stan-Kłeczek, Andrzej Górszczyk, Wojciech Gajek, Szymon Oryński, Rafał Czarny
The problem of landslides is one of the greatest challenges in geohazard research. Due to their unpredictability, and complicated genesis, their detailed and accurate observation is necessary. Despite many studies on the subject, a general scheme for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5270cc2d12e0257d00c523644655a7f9
https://doi.org/10.5194/egusphere-egu23-2585
https://doi.org/10.5194/egusphere-egu23-2585
Autor:
Wojciech Gajek
High-melt areas of glaciers generate a rich spectrum of ambient seismicity. These signals do not only contain information about the source mechanisms (e.g. englacial fracturing, water flow, iceberg detachment, basal stick-slip motion) but also carry
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c5c431dbb3c92a1d52fe935786cc617
https://doi.org/10.5194/egusphere-egu23-16346
https://doi.org/10.5194/egusphere-egu23-16346
Calving of tidewater glaciers is a key driver of glacier mass loss as well as a significant contribution towards sea level rise. However, this dynamic process is still challenging to quantify. In addition, there are very few direct measurements of ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a9defbf1f0da306dbe1d4b12844d7ec
https://doi.org/10.5194/egusphere-egu22-4179
https://doi.org/10.5194/egusphere-egu22-4179
Autor:
William D. Harcourt, Duncan A. Robertson, David G. Macfarlane, Brice R. Rea, Matteo Spagnolo, Doug I. Benn, Michael R. James, Wojciech Gajek, Danielle Pearce, Penelope How
The release of icebergs into the ocean through glacier calving is a major source of mass loss from tidewater glaciers across the Arctic. However, there are very few direct measurements of calving activity in Svalbard at daily to sub-daily resolution
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::806ac9a1736ca2e979eb763d593e44de
https://doi.org/10.5194/egusphere-egu22-143
https://doi.org/10.5194/egusphere-egu22-143
Autor:
Bradly P. Lipovsky, Pascal Edme, Andreas Fichtner, Eileen Martin, Wojciech Gajek, Fabian Walter, Patrick Paitz
Publikováno v:
EGUsphere
Over the past 1-2 decades, seismological measurements have provided new and unique insights into glacier and ice sheet dynamics. At the same time, sensor coverage is typically limited in harsh glacial environments with littile or no access. Turning k
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d6b14ceef9b5e734e09a6793ce1da041
Autor:
Michal Malinowski, Wojciech Gajek
Publikováno v:
Journal of Applied Geophysics, 184
Microseismic monitoring is the only tool to provide locations of microseismic events induced e.g. during hydraulic fracturing of unconventional reservoirs. Obtained locations become a baseline for the evaluation of stimulation effectiveness. However,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5fd278960080333e595d1af75ea63b8
https://hdl.handle.net/20.500.11850/454571
https://hdl.handle.net/20.500.11850/454571
Publikováno v:
Interpretation. 6:SH49-SH58
Observations of azimuthal seismic anisotropy provide useful information, notably on stress orientation and the presence of preexisting natural fracture systems, during hydraulic fracturing operations. Seismic anisotropy can be observed through the me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e5e4d19ab9542220fa911ee73064255
https://doi.org/10.1190/int-2017-0207.1
https://doi.org/10.1190/int-2017-0207.1
Publikováno v:
Interpretation. 6:SH39-SH48
A precise velocity model is necessary to obtain reliable locations of microseismic events, which provide information about the effectiveness of the hydraulic stimulation. Seismic anisotropy plays an important role in microseismic event location by im
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eaa971a0d53e37097f3de66a5229618e
https://doi.org/10.1190/int-2017-0205.1
https://doi.org/10.1190/int-2017-0205.1
Publikováno v:
Journal of Glaciology. 63:581-592
Retreating glaciers are a consequence of a warming climate. Thus, numerous monitoring campaigns are being carried out to increase understanding of this on-going process. One phenomenon related to dynamic glacial changes is glacier-induced seismicity;
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d2d270a43c7351eb751d4ab53733ca4
https://doi.org/10.1017/jog.2017.25
https://doi.org/10.1017/jog.2017.25