Publication Date:
2021-11-26
Description:
Structure and dynamics of fault systems can be investigated using repeating earthquakes as
repeatable seismic sources, alongside ground deformation measurements. Here we utilise a
dataset of repeating earthquakes which occurred between 2000 and 2019 along the transtensive
Pernicana fault system on the northeast flank of Mount Etna, Italy, to investigate the
fault structure, as well as the triggering mechanisms of the seismicity. By grouping the
repeating earthquakes into families and integrating the seismic data with GPS measurements
of ground deformation, we identify four distinct portions of the fault. Each portion shows a
different behaviour in terms of seismicity, repeating earthquakes and ground deformation,
which we attribute to structural differences including a segmentation of the fault plane at
depth. The recurrence intervals of repeating earthquake families display a low degree of
regularity which suggests an episodic triggering mechanism, such as magma intrusion, rather
than displacement under a constant stress.
Description:
Published
Description:
116
Description:
2V. Struttura e sistema di alimentazione dei vulcani
Description:
JCR Journal
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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