It appears you don't have support to open PDFs in this web browser. To view this file, Open with your PDF reader
Abstract
Analysis of seismicity can illuminate active fault zone structures but also deformation within large volumes of the seismogenic zone. For the Mw 6.5 2016–2017 Central Italy seismic sequence, seismicity not only localizes along the major structures hosting the mainshocks (on-fault seismicity), but also occurs within volumes of Triassic Evaporites, TE, composed of alternated anhydrites and dolostones. These volumes of distributed microseismicity show a different frequency-magnitude distribution than on-fault seismicity. We interpret that, during the sequence, shear strain-rate increase, and fluid overpressure promoted widespread ductile deformation within TE that light-up with distributed microseismicity. This interpretation is supported by field and laboratory observations showing that TE background ductile deformation is complex and dominated by distributed failure and folding of the anhydrites associated with boudinage hydro-fracturing and faulting of dolostones. Our results indicate that ductile crustal deformation can cause distributed microseismicity, which obeys to different scaling laws than on-fault seismicity occurring on structures characterized by elasto-frictional stick-slip behaviour.
A new study sheds light on earthquake physics, showing that lithological and rheological heterogeneities in the rocks composing the seismogenic layer strongly influence seismicity distributions and earthquake scaling laws.
You have requested "on-the-fly" machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Show full disclaimer
Neither ProQuest nor its licensors make any representations or warranties with respect to the translations. The translations are automatically generated "AS IS" and "AS AVAILABLE" and are not retained in our systems. PROQUEST AND ITS LICENSORS SPECIFICALLY DISCLAIM ANY AND ALL EXPRESS OR IMPLIED WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES FOR AVAILABILITY, ACCURACY, TIMELINESS, COMPLETENESS, NON-INFRINGMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Your use of the translations is subject to all use restrictions contained in your Electronic Products License Agreement and by using the translation functionality you agree to forgo any and all claims against ProQuest or its licensors for your use of the translation functionality and any output derived there from. Hide full disclaimer
Details





1 Università di Roma La Sapienza, Dipartimento di Scienze della Terra, Rome, Italy (GRID:grid.7841.a); Istituto Nazionale di Geofisica e Vulcanologia (INGV), Rome, Italy (GRID:grid.410348.a) (ISNI:0000 0001 2300 5064); Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, Firenze, Italy (GRID:grid.182470.8)
2 Dipartimento di Fisica e Geologia Università degli Studi di Perugia, Perugia, Italy (GRID:grid.9027.c) (ISNI:0000 0004 1757 3630)
3 Durham University, Department of Earth Sciences, Durham, UK (GRID:grid.8250.f) (ISNI:0000 0000 8700 0572)
4 Università di Roma La Sapienza, Dipartimento di Scienze della Terra, Rome, Italy (GRID:grid.7841.a); Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, Firenze, Italy (GRID:grid.182470.8)
5 Università di Roma La Sapienza, Dipartimento di Scienze della Terra, Rome, Italy (GRID:grid.7841.a); Istituto Nazionale di Geofisica e Vulcanologia (INGV), Rome, Italy (GRID:grid.410348.a) (ISNI:0000 0001 2300 5064)