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Ring Fault Slip Reversal at Bárðarbunga Volcano, Iceland: Seismicity during Caldera Collapse and Re‐Inflation 2014–2018

Accepted version
Peer-reviewed

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Article

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Authors

Glastonbury‐Southern, E  ORCID logo  https://orcid.org/0000-0002-7259-3613
White, RS 

Abstract

Microearthquakes 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.

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Journal Title

Geophysical Research Letters

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Journal ISSN

0094-8276
1944-8007

Volume Title

Publisher

American Geophysical Union (AGU)
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