Ring Fault Slip Reversal at Bárðarbunga Volcano, Iceland: Seismicity During Caldera Collapse and Re-Inflation 2014–2018
Published version
Peer-reviewed
Repository URI
Repository DOI
Change log
Authors
Glastonbury-Southern, E https://orcid.org/0000-0002-7259-3613
Winder, T https://orcid.org/0000-0001-7047-8673
White, RS https://orcid.org/0000-0002-2972-397X
Brandsdóttir, B https://orcid.org/0000-0002-4018-0697
Abstract
jats:titleAbstract</jats:title>jats:pMicroearthquakes reveal the kinematics of the Bárðarbunga caldera ring fault; during the 2014–2015 rifting event and gradual caldera collapse, and its subsequent, ongoing re‐inflation. Tightly constrained focal mechanisms during re‐inflation have reversed phase arrival polarities from events during the caldera collapse. Thus, the inner side of the steeply dipping northern caldera faults (averaging 81 ± 8°) has been moving upwards during the post‐eruptive period. Both precise relative relocations of the seismicity and fault plane solutions confirm that this is due to slip reversal on the same ring fault structure.</jats:p>
Description
Keywords
Baroarbunga, Holuhraun, caldera collapse, microearthquakes, earthquake mechanisms
Journal Title
Geophysical Research Letters
Conference Name
Journal ISSN
0094-8276
1944-8007
1944-8007
Volume Title
Publisher
American Geophysical Union (AGU)
Publisher DOI
Sponsorship
Natural Environment Research Council (NE/F011407/1)
Natural Environment Research Council (NE/M017427/1)
European Commission (308377)
NERC (NE/L002507/1)
NERC (NE/S007164/1)
Natural Environment Research Council (NE/M017427/1)
European Commission (308377)
NERC (NE/L002507/1)
NERC (NE/S007164/1)