dc.contributor.author
Najafabadi, Azam Jozi
dc.contributor.author
Haberland, Christian
dc.contributor.author
Ryberg, Trond
dc.contributor.author
Verwater, Vincent F.
dc.contributor.author
Le Breton, Eline
dc.contributor.author
Handy, Mark R.
dc.contributor.author
Weber, Michael
dc.date.accessioned
2021-08-02T13:34:20Z
dc.date.available
2021-08-02T13:34:20Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/31474
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-31206
dc.description.abstract
In this study, we analyzed a large seismological dataset from temporary and permanent networks in the southern and eastern Alps to establish high-precision hypocenters and 1-D VP and VP/VS models. The waveform data of a subset of local earthquakes with magnitudes in the range of 1–4.2 ML were recorded by the dense, temporary SWATH-D network and selected stations of the AlpArray network between September 2017 and the end of 2018. The first arrival times of P and S waves of earthquakes are determined by a semi-automatic procedure. We applied a Markov chain Monte Carlo inversion method to simultaneously calculate robust hypocenters, a 1-D velocity model, and station corrections without prior assumptions, such as initial velocity models or earthquake locations. A further advantage of this method is the derivation of the model parameter uncertainties and noise levels of the data. The precision estimates of the localization procedure is checked by inverting a synthetic travel time dataset from a complex 3-D velocity model and by using the real stations and earthquakes geometry. The location accuracy is further investigated by a quarry blast test. The average uncertainties of the locations of the earthquakes are below 500 m in their epicenter and ∼ 1.7 km in depth. The earthquake distribution reveals seismicity in the upper crust (0–20 km), which is characterized by pronounced clusters along the Alpine frontal thrust, e.g., the Friuli-Venetia (FV) region, the Giudicarie–Lessini (GL) and Schio-Vicenza domains, the Austroalpine nappes, and the Inntal area. Some seismicity also occurs along the Periadriatic Fault. The general pattern of seismicity reflects head-on convergence of the Adriatic indenter with the Alpine orogenic crust. The seismicity in the FV and GL regions is deeper than the modeled frontal thrusts, which we interpret as indication for southward propagation of the southern Alpine deformation front (blind thrusts).
en
dc.format.extent
23 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject.ddc
500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften
dc.title
Relocation of earthquakes in the southern and eastern Alps (Austria, Italy) recorded by the dense, temporary SWATH-D network using a Markov chain Monte Carlo inversion
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.doi
10.5194/se-12-1087-2021
dcterms.bibliographicCitation.journaltitle
Solid Earth
dcterms.bibliographicCitation.number
5
dcterms.bibliographicCitation.pagestart
1087
dcterms.bibliographicCitation.pageend
1109
dcterms.bibliographicCitation.volume
12
dcterms.bibliographicCitation.url
https://doi.org/10.5194/se-12-1087-2021
refubium.affiliation
Geowissenschaften
refubium.affiliation.other
Institut für Geologische Wissenschaften / Fachrichtung Tektonik und Sedimentäre Systeme
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
1869-9529
refubium.resourceType.provider
WoS-Alert