Publication Date:
2017-04-04
Description:
The Colli Albani is a Quaternary quiescent volcano, located a few kilometers
southeast of Rome (Italy). During the past decade, seismic swarms, ground deformation,
and gas emissions occurred in the southwestern part of the volcano, where the last
phreatomagmatic eruptions (27 ka) developed, building up several coalescent craters. In
the frame of a Dipartimento Protezione Civile – Istituto Nazionale di Geofisica e
Vulcanologica project aimed at the definition and mitigation of volcanic hazard, a
temporary array of seismic stations has been deployed on the volcano and surrounding
areas. We present results obtained using receiver functions analysis for eight stations,
located upon and around the volcanic edifice, and revealing how the built of the volcanic
edifice influenced the prevolcanic structures. The stations show some common features:
the Moho is almost flat and located at 23 km, in agreement with the thinning of the
Thyrrenian crust. Also the presence of a shallow limestone layer is a stable feature under
every station, with a variable thickness between 4 and 5 km. However, some features
change from station to station, indicating a local complexity of the crustal structure: a
shallow discontinuity dividing the Plio-Pleistocene sediments by the Meso-Cenozoic
limestones, and a localized anisotropic layer, in the central part of the old structure,
which points of the deformation of the limestones. Other two strongly anisotropic layers
are detected under the stations in lower crust and upper mantle, with symmetry axis
directions related to the evolution of the volcano complex.
Description:
Published
Description:
B09313
Description:
3.3. Geodinamica e struttura dell'interno della Terra
Description:
JCR Journal
Description:
reserved
Keywords:
Receiver Function
;
Colli Albani
;
crustal structure
;
04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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