Publication Date:
2024-03-12
Description:
This article has been accepted for publication in Geophysical Journal International ©:The Author(s) 2023. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.Uploaded in accordance with the publisher's self-archiving policy.
All rights reserved.
Description:
We present the results from a fully unconstrained moment tensor inversion of induced seismic
events in a complex and high seismic hazard region (Val d’Agri basin, Southern Italy).
The study area hosts two well-documented cases of induced microseismicity linked to (i) a
wastewater injection well of a giant oilfield (the largest in onshore Europe), and (ii) severe
seasonal level changes of an artificial lake. In order to gather information on the non-doublecouple
components of the source and to better understand the rupture mechanisms, we analyse
seismic events recorded during daily injection tests in the disposal well. The computed moment
tensors have significant non-double-couple components that correlate with the well-head
injection pressure. The injection parameters strongly influence the rupture mechanism that
can be interpreted as due to the opening/closing of a fracture network inside a fault zone of a
pre-existing thrust fault. For the case of the reservoir-induced seismicity, no direct correlations
are observed with the loading/unloading of the reservoir.
Description:
Published
Description:
1617–1627
Description:
OST3 Vicino alla faglia
Description:
JCR Journal
Keywords:
04.06. Seismology
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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