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dc.contributor.author
Kueppers, Ulrich
dc.contributor.author
Pimentel, Adriano
dc.contributor.author
Ellis, Ben
dc.contributor.author
Forni, Francesca
dc.contributor.author
Neukampf, Julia
dc.contributor.author
Pacheco, Jose
dc.contributor.author
Perugini, Diego
dc.contributor.author
Queiroz, Gabriela
dc.date.accessioned
2019-06-12T15:20:54Z
dc.date.available
2019-06-12T02:10:11Z
dc.date.available
2019-06-12T15:20:54Z
dc.date.issued
2019-05-28
dc.identifier.issn
2296-6463
dc.identifier.other
10.3389/feart.2019.00122
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/346887
dc.identifier.doi
10.3929/ethz-b-000346887
dc.description.abstract
It is well known that explosive volcanic eruptions pose serious hazards to local communities and may have worldwide impacts. However, the products of explosive eruptions on volcanic ocean islands are almost inevitably incompletely preserved as a significant portion of the erupted material is deposited into the ocean, thereby impeding our ability to accurately reconstruct past events, determine eruptive source parameters and ultimately assess the associated hazards. Sete Cidades is the westernmost central volcano of São Miguel Island, Azores. Although currently dormant, it has been the most active volcano on the island in the last 5 ky, with at least 17 trachytic explosive eruptions, some of which sub-Plinian, that took place inside the summit caldera. The last paroxysmal explosive eruption took place at ∼16 ka, enlarging the caldera to its present dimensions, and is recorded by the Santa Bárbara Formation. We here present evidence of a mid-distal deposit (>25 km from the vent) that can be correlated with the proximal (on Sete Cidades volcanic edifice) pumice fall deposit of the Santa Bárbara Formation based on deposit characteristics, textural features and geochemistry. This is the first evidence of a decimeter-thick deposit of Sete Cidades volcano in the central part of São Miguel Island, which allows to constrain eruptive source parameters and wind conditions. Given the predominant winds blowing from westerly directions, Sete Cidades is considered the most hazardous volcano for the entire island of São Miguel with its current population of >137,000 inhabitants. Most critically, the main harbor, only airport and hospital are located in the capital city of Ponta Delgada, ∼12 km SE from Sete Cidades caldera. In case of a future explosive eruption, under westerly blowing wind conditions, the impact on São Miguel could be catastrophic, with long-term economic consequences.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Frontiers Media
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
ocean island volcano
en_US
dc.subject
incomplete eruption record
en_US
dc.subject
explosive eruption
en_US
dc.subject
tephra fallout
en_US
dc.subject
inverse problem
en_US
dc.subject
volcanic hazard
en_US
dc.subject
eruptive scenarios
en_US
dc.subject
Sao Miguel Island
en_US
dc.title
Biased Volcanic Hazard Assessment Due to Incomplete Eruption Records on Ocean Islands: An Example of Sete Cidades Volcano, Azores
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Frontiers in Earth Science
ethz.journal.volume
7
en_US
ethz.journal.abbreviated
Front. Earth Sci.
ethz.pages.start
122
en_US
ethz.size
17 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Lausanne
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03958 - Bachmann, Olivier / Bachmann, Olivier
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03958 - Bachmann, Olivier / Bachmann, Olivier
ethz.date.deposited
2019-06-12T02:10:15Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2019-06-12T15:21:08Z
ethz.rosetta.lastUpdated
2024-02-02T08:17:19Z
ethz.rosetta.versionExported
true
ethz.COinS
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