Zobrazeno 1 - 10
of 44
pro vyhledávání: '"G. Ófeigsson"'
Autor:
Gregory P. DePascale, Tomáš J. Fischer, William Michael Moreland, Halldór Geirsson, Pavla Hrubcová, Vincent Drouin, Danielle Forester, Méline Payet‐‐Clerc, Diana Brum daSilveira, Josef Vlček, Benedikt G. Ófeigsson, Ármann Höskuldsson, Helga Kristín Torfadóttir, Iðunn Kara Valdimarsdóttir, Birta Dís Jónsdóttir Blöndal, Ingibjörg Jónsdóttir, Sigurjón Jónsson, Thor Thordarson
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 14, Pp n/a-n/a (2024)
Abstract Grabens, or valleys formed during extensional tectonic events, are common but rarely observed during formation. In November 2023, inelastic surface deformation formed abruptly along Iceland's plate boundary in Grindavík. We documented grabe
Externí odkaz:
https://doaj.org/article/5cda169356be4b4bb8975b3c34e32db2
Autor:
E. P. S. Eibl, K. S. Vogfjörd, B. G. Ófeigsson, M. J. Roberts, C. J. Bean, M. T. Jones, B. H. Bergsson, S. Heimann, T. Dietrich
Publikováno v:
Earth Surface Dynamics, Vol 11, Pp 933-959 (2023)
Subglacial floods cause seismic tremors that can be located and tracked in space and time using a seismic array. Here, we shed light on the generating mechanisms of the seismic signals observed during the largest measured flood from the eastern Skaft
Externí odkaz:
https://doaj.org/article/a2353e9e5adc4ddd8d481bbf4863763b
Autor:
Michelle M. Parks, Freysteinn Sigmundsson, Vincent Drouin, Sigrún Hreinsdóttir, Andrew Hooper, Yilin Yang, Benedikt G. Ófeigsson, Erik Sturkell, Ásta R. Hjartardóttir, Ronni Grapenthin, Halldór Geirsson, Elisa Trasatti, Sara Barsotti, Rikke Pedersen, Páll Einarsson, Bergrún A. Óladóttir, Hildur M. Friðriksdóttir
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 4, Pp n/a-n/a (2024)
Abstract Unrest began in July 2021 at Askja volcano in the Northern Volcanic Zone (NVZ) of Iceland. Its most recent eruption, in 1961, was predominantly effusive and produced ∼0.1 km3 lava field. The last plinian eruption at Askja occurred in 1875.
Externí odkaz:
https://doaj.org/article/d85f8ea887504790a66318307fc7de2d
Autor:
E. Magnússon, F. Pálsson, M. T. Gudmundsson, T. Högnadóttir, C. Rossi, T. Thorsteinsson, B. G. Ófeigsson, E. Sturkell, T. Jóhannesson
Publikováno v:
The Cryosphere, Vol 15, Pp 3731-3749 (2021)
We present repeated radio-echo sounding (RES, 5 MHz) on a profile grid over the eastern Skaftá cauldron (ESC) in Vatnajökull ice cap, Iceland. The ESC is a ∼ 3 km wide and 50–150 m deep ice cauldron created and maintained by subglacial geotherm
Externí odkaz:
https://doaj.org/article/254228c7ef5649fdbc518e204c5ef1c0
Autor:
Freysteinn Sigmundsson, Virginie Pinel, Ronni Grapenthin, Andrew Hooper, Sæmundur A. Halldórsson, Páll Einarsson, Benedikt G. Ófeigsson, Elías R. Heimisson, Kristín Jónsdóttir, Magnús T. Gudmundsson, Kristín Vogfjörd, Michelle Parks, Siqi Li, Vincent Drouin, Halldór Geirsson, Stéphanie Dumont, Hildur M. Fridriksdottir, Gunnar B. Gudmundsson, Tim J. Wright, Tadashi Yamasaki
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-11 (2020)
Large-volume volcanic eruptions can occur despite only limited precursory activity. Here the authors show that modelling the combined effects of buoyant magma, viscoelastic earth behaviour, and sustained magma channels can explain such behaviour of v
Externí odkaz:
https://doaj.org/article/0c024d3baeee4898b806085012a75a92
The Tjörnes Fracture Zone poses significant seismic hazard to the town of Húsavík and other nearby coastal communities in North Iceland as it is capable of generating earthquakes of magnitude ~7. The 120 km long offset connects the offshore Kolbei
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fd18aba5deb9ad7ae3327d40cf6809c
https://doi.org/10.5194/egusphere-egu23-9752
https://doi.org/10.5194/egusphere-egu23-9752
Autor:
Freysteinn Sigmundsson, Michelle Parks, Halldór Geirsson, Páll Einarsson, Vincent Drouin, Benedikt G. Ófeigsson, Kristín Jónsdóttir, Kristín S. Vogfjörd, Andrew Hooper, Yilin Yang, Sonja H. M. Greiner, Siqi Li, Chiara Lanzi, Sigrún Hreinsdóttir, Ronni Grapenthin, Erik Sturkell, Elske de Zeeuw van Dalfsen, Mathijs Koymans, Sara Barsotti
Precursors to volcanic eruptions vary widely between volcanic systems and their individual eruptions. Volcanic systems in Iceland undergoing unrest include the Reykjanes, Svartsengi, Fagradalsfjall, and Krísuvík systems on the obliquely spreading R
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0593fe772b236e89b18564037b2aaff
https://doi.org/10.5194/egusphere-egu23-9696
https://doi.org/10.5194/egusphere-egu23-9696
Autor:
Thórdís Högnadóttir, Benedikt G. Ófeigsson, Cristian Rossi, Finnur Pálsson, Eyjólfur Magnússon, Thorsteinn Thorsteinsson, Erik Sturkell, Tómas Jóhannesson, Magnús T. Gudmundsson
Publikováno v:
The Cryosphere, Vol 15, Pp 3731-3749 (2021)
We present repeated radio-echo sounding (RES, 5 MHz) on a profile grid over the Eastern Skaftá Cauldron (ESC) in Vatnajökull ice cap, Iceland. The ESC is ~3 km wide and 50–150 m deep ice cauldron created and maintained by subglacial geother
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2fd98a0dc26960d3a4f64b8e44d6b97c
https://tc.copernicus.org/articles/15/3731/2021/tc-15-3731-2021.pdf
https://tc.copernicus.org/articles/15/3731/2021/tc-15-3731-2021.pdf
Autor:
Eva P. S. Eibl, Kristin S. Vogfjörd, Benedikt G. Ófeigsson, Matthew J. Roberts, Christopher J. Bean, Morgan T. Jones, Bergur H. Bergsson
Subglacial floods are hazardous events. Since seismic tremor accompanies them, the source can be located and tracked in space and time using a seismic array. However, understanding how these seismic signals are generated remains elusive. Here, we stu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7057b52813759266508f8c056ace70c2
https://doi.org/10.5194/egusphere-2022-644
https://doi.org/10.5194/egusphere-2022-644
Autor:
Siqi Li, Ronni Grapenthin, Freysteinn Sigmundsson, Vincent Drouin, Sigrún Hreinsdóttir, Benedikt G. Ófeigsson
Publikováno v:
Geophysical Research Letters. 49
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b59a965b1fe0ff820741b47d81159a2c
https://doi.org/10.1029/2022gl098977
https://doi.org/10.1029/2022gl098977