Imaging overpressurised fracture networks and geological barriers hindering fluid migrations across a slow-deformation seismic gap.

ABSTRACT: There is an ongoing debate on the processes producing background seismicity and deformation transients across seismic gaps, i.e., regions that lack historical large-magnitude earthquakes. Essential missing elements are geophysical images that resolve sources of geophysical unrest. Here, we apply seismic scattering and absorption tomography to data recorded during the 2010-2014 seismic sequence within the Mt. Pollino seismic gap region (Southern Italy). The tomographic models show high sensitivity to fluid content, deformed fractured structures, and impermeable layers stopping fluid migrations. They bridge the gaps between geological and geophysical models and provide a highly-resolved image of the source of seismic and deformation unrest within this seismic gap. High absorption topping the

SUBMITTER: Napolitano F 

PROVIDER: S-EPMC10640567 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature