Pre-existing structures control the orientation of strike-slip faulting during the 2021 dike intrusion at Fagradalsfjall, Iceland
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F25%3A00636838" target="_blank" >RIV/67985530:_____/25:00636838 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/25:10505809
Result on the web
<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024JB030162" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024JB030162</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2024JB030162" target="_blank" >10.1029/2024JB030162</a>
Alternative languages
Result language
angličtina
Original language name
Pre-existing structures control the orientation of strike-slip faulting during the 2021 dike intrusion at Fagradalsfjall, Iceland
Original language description
The 2021 Fagradalsfjall inflation and dike intrusion marked the initiation of a new era of volcanism on Iceland's Reykjanes Peninsula. We present a large automatic catalog consisting of more than 80,000 earthquake hypocenters spanning the full period of the dike intrusion, which were derived from seismic data recorded by a dense network of seismometers. The 9-10 km long dike exhibits a two-segment geometry of similar lengths. Linear regression on a relatively relocated subset of over 12,000 earthquakes revealed a strike of 029 degrees with a standard deviation of 2 degrees in the southern segment, and 046 degrees with a standard deviation of 1 degrees in the northern segment of the dike. A total of 97 detailed fault plane solutions from selected subsets of events provide new insight into the controls on faulting, showing almost exclusively right-lateral strike-slip/oblique-slip faulting associated with the dike intrusion, and a lack of left-lateral strike-slip fault motion. The alignment of fault planes is consistent with the orientation of pre-existing structures, within uncertainty estimates. In light of these observations, we conclude that the dominant controlling factor on the orientation of dike-related faulting is the extensive network of pre-existing structures formed by the active transtensional plate boundary along the Reykjanes Peninsula.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10507 - Volcanology
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Geophysical Research-Solid Earth
ISSN
2169-9313
e-ISSN
2169-9356
Volume of the periodical
130
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
20
Pages from-to
e2024JB030162
UT code for WoS article
001505523900001
EID of the result in the Scopus database
2-s2.0-105008314468