Post-Seismic Deformation Related to the 2016 Central Italy Seismic Sequence from GPS Displacement Time-Series

Abstract

The 2016 Amatrice-Visso-Norcia earthquake sequence started on August, 24 when a Mw 6.0 event struck a sector of the Central Apennines (Figure 1) that is characterized by a narrow band of measurable geodetic and seismic deformation rates (Barani et al., 2017;D'Agostino, 2014;Sani et al., 2016). It caused hundreds of deaths and considerable damage to the town of Amatrice and its surroundings (Pucci et al., 2017; Figure 1). Seismicity followed the mainshock both northwest and southeast of the epicenter (Chiaraluce, Di Stefano, et al., 2017) with decreasing magnitude and frequency, until when a Mw 5.9 event occurred on October 26, about 25 km to the NW of Amatrice's earthquake epicenter, near the village of Visso (Figure 1). On October 30, the largest event of the seismic sequence (Mw 6.5) occurred near the town of Norcia, involving a portion of the fault system between the two preceding events which had previously been left unruptured (Cheloni et al.

Postseismic Deformation in the Northern Antarctic Peninsula Following the 2003 and 2013 Scotia Sea Earthquakes

“…This problem is non-trivial. It may be possible to separate the various spatial-temporal processes using principal or independent component analysis, or other data separation approaches such as those based on machine learning (Dong et al, 2006;Gao et al, 2022;Liu et al, 2018;Mandler et al, 2021). A viscoelastic model that includes both earthquake-related slip and a changing ice load would also be a step forward in modeling Antarctic deformation in a consistent way.…”

Interplay Between Seismic and Aseismic Deformation on the Central Range Fault During the 2013 Mw 6.3 Ruisui Earthquake (Taiwan)

“…Several mechanisms are commonly involved in postseismic transient deformation. Viscoelastic lower crust or upper mantle relaxation can follow moderate-magnitude events (M w ∼ 6-6.5) (Mandler et al, 2021) and is characterized by large-scale and long-lasting deformation (months to years) (Tang et al, 2019). Here, postseismic relaxation is of short-duration (∼3 months) and is mainly recorded by near-source GNSS stations.…”