Strain monitoring of active faults in the central Apennines (Italy) during the period 2002–2017

0543661 - GLÚ 2022 RIV NL eng J - Journal Article
Stemberk, J. - Dal Moro, G. - Stemberk, J. - Blahůt, J. - Coubal, Miroslav - Košťák, B. - Zambrano, M. - Tondi, E.
Strain monitoring of active faults in the central Apennines (Italy) during the period 2002–2017.
Tectonophysics. Roč. 750, January (2019), s. 22-35. ISSN 0040-1951. E-ISSN 1879-3266
Institutional support: RVO:67985831
Keywords : Active tectonics * 3-D fault slip monitoring * Transient fault slip acceleration * Switching stress/strain state * Earthquakes * The central Apennines
OECD category: Geology
Impact factor: 3.048, year: 2019
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0040195118303755

We present the results of 3-D monitoring of strain along active faults outcropping in the central Apennines, where recent and historical strong earthquakes occurred, using TM-71 extensometers during the period 2002–2017. We discuss the fault slip development as well as kinematics particularly in the light of local recent seismicity. The recorded fault slip corresponds to the minimum and maximum principal stress with a SW-NE orientation and slightly dipping to SW. Moreover, the detected fault slip is non-linear and affected by remarkable transient periods of acceleration, which lasted up to several months. The recorded accelerations were induced by alternation of extensional, reverse and horizontal displacement due to switching extensional and compressional stress/strain state and coincide with periods of major seismic events that recently affected the central Apennines. This phenomenon is being investigated. In the case of the moderate L'Aquila 2009 and Norcia 2016 earthquakes, the recorded fault slips can be characterized as pre-seismic.
Permanent Link: http://hdl.handle.net/11104/0320845