The 2016–2017 Central Apennines Seismic Sequence: Analogies and Differences with Recent Italian Earthquakes

2018 ◽  
pp. 603-638 ◽  
Author(s):  
Mauro Dolce ◽  
Daniela Di Bucci
Keyword(s):  
Seismic Sequence ◽  
Central Apennines

scholarly journals PREFACE

2017 ◽  
Vol 59 ◽  
Author(s):  
Carlo Doglioni ◽  
Marco Anzidei ◽  
Silvia Pondrelli ◽  
Fabio Florindo
Keyword(s):  
Central Italy ◽  
Universal Time ◽  
Wide Area ◽  
Seismic Sequence ◽  
Central Apennines ◽  
Total Destruction ◽  
Italian Regions

<p>The M=6.0 earthquake that struck central Italy at 01:36 UTC (Universal Time Coordinated) on August 24, 2016, marked the beginning of a long, still-ongoing seismic sequence, which culminated in the Mw 6.5 event at 06:40 UTC on October 30, 2016, while this volume was already in preparation, and reactivated again when this preface was almost complete. This dramatic seismic sequence, which on January 18, 2017, released four additional events of M between 5.0 and 5.5 in a few hours, caused 298 casualties, hundreds of injuries, and the practically total destruction of several villages across a wide area of the central Apennines, covering the Italian Regions of Lazio, Umbria, Marche and Abruzzo. In particular, the historical village of Amatrice was completely destroyed. [...]</p>

Effects of earthquakes on the discharge of groundwater systems: The case of the 2016 seismic sequence in the Central Apennines, Italy

2020 ◽  
Vol 583 ◽  
pp. 124509 ◽  
Author(s):  
Lucio Di Matteo ◽  
Walter Dragoni ◽  
Salvatore Azzaro ◽  
Cristina Pauselli ◽  
Massimiliano Porreca ◽  
...  
Keyword(s):  
Seismic Sequence ◽  
Central Apennines ◽  
Groundwater Systems

The upper crustal geological and structural setting in the area of the 2016-2018 Central Apennines seismic sequence. From subsurface modeling to seismotectonics.

2020 ◽  
Author(s):  
Francesco Emanuele Maesano ◽  
Mauro Buttinelli ◽  
Lorenzo Petracchini ◽  
Chiara D'Ambrogi ◽  
Davide Scrocca ◽  
...  
Keyword(s):  
Large Scale ◽  
Structural Complexity ◽  
Seismic Hazard Assessment ◽  
Strong Impact ◽  
Large Set ◽  
Seismic Sequence ◽  
Central Apennines ◽  
Tectonically Active ◽  
Mountain Chain ◽  
Inherited Faults

&lt;p&gt;Central Apennines (Italy) is a young and tectonically active mountain chain characterized by a high structural complexity where structures related to various tectonic phases are interacting with each other leading to the reactivation of inherited structures and/or to the segmentation of newly formed ones with a strong impact on the current seismotectonics of the area.&lt;/p&gt;&lt;p&gt;In this context, the surface geological and coseismic observations cannot always be extrapolated straightforward to depth and need to be interpreted in the context of the general upper crustal deformation history.&lt;/p&gt;&lt;p&gt;These considerations apply also to the area struck by the 2016-2018 Central Apennines seismic sequence where the activation of both single faults and complex fault systems has been observed.&lt;/p&gt;&lt;p&gt;In the framework of the RETRACE-3D project, we present a comprehensive 3D geological model derived from the interpretation of a large set of underground data acquired for hydrocarbons explorations and we discuss the implication of this geological reconstruction for the seismotectonics of the area by comparing our results with the coseismic observation.&lt;/p&gt;&lt;p&gt;Our results primarily show that, although the area is currently affected by an extensional tectonic regime, the main architecture of this portion of the chain is still dominated by previous compressional large-scale structures with widespread evidence of segmentation, reactivation and even inversion of various sets of inherited faults.&lt;/p&gt;&lt;p&gt;These results pose new points of discussion on information and input data needed to understand the seismogenesis in young and complex mountain chains, such as the Central Apennines, and strongly impact on the consequent seismic hazard assessment study.&lt;/p&gt;

Multiparametric data analysis for identifying active fault geometries in the Abruzzo and Molise regions (Central-Southern Appennines, Italy)

2020 ◽  
Author(s):  
Germana Gaudiosi ◽  
Valeria Paoletti ◽  
Rosa Nappi ◽  
Paola Luiso ◽  
Federico Cella ◽  
...  
Keyword(s):  
Data Analysis ◽  
Integrated Analysis ◽  
Imaging Method ◽  
Seismic Sequence ◽  
Southern Apennines ◽  
Central Apennines ◽  
Parametric Data ◽  
Epicentral Distribution ◽  
Fucino Basin ◽  
Low Magnitude

&lt;p&gt;The Central and Southern Apennines are characterized by the occurrence of intense and widely spread historical and recent seismic activity, mostly located along the chain.&lt;/p&gt;&lt;p&gt;In this paper, we present a multi-parametric data analysis in GIS environment (Geographic Information System) with the aim of identifying and constraining the geometry (strike, dip direction and dip angle) of the seismogenic faults in areas of Central-Southern Apennines characterized by outcropping/ buried and/or active/silent faults.&lt;/p&gt;&lt;p&gt;We use an integrated analysis of geo-structural, seismological and gravimetric data, for the identification and geometrical description of faults with density contrast, both at the surface and at depth. At the surface, the gravity lineaments inferred by Multiscale Derivative Analysis (MDA) were compared with the Quaternary faults mapped in the study areas and with the earthquakes&amp;#8217; epicentral distribution. The characterization of faults at depth was instead performed by the combination of the Depth from Extreme Points (DEXP) gravity imaging method with hypocentral sections.&lt;/p&gt;&lt;p&gt;We tested the effectiveness of this multi-method approach at Mt. Vettore-Mt. Bove, L&amp;#8217;Aquila basin, Mt. Massico and San Giuliano di Puglia areas (Central and Southern Apennines).&lt;/p&gt;&lt;p&gt;Given the effectiveness of the obtained results, this multiparametric study has been applied to other three areas of the Abruzzo-Molise region: the south-western sector of Mt. Matese, the Fucino basin and the Sulmona basin.&lt;/p&gt;&lt;p&gt;The Matese area was hit by a seismic sequence in 2013-2014 (M&lt;sub&gt;wmax&lt;/sub&gt;= 5.1 on December 29, 2013). Our approach showed a correlation between the epicentral distribution of the 2013-2014 Matese seismic sequence (M&lt;sub&gt;w&lt;/sub&gt;=5.0) and the MDA lineaments from gravity data. The hypocentral distibution suggests that the fault rupture does not reach the surface. Therefore, the seismogenic fault responsible of 2013-2014 Matese seismic sequence is likely a buried fault.&lt;/p&gt;&lt;p&gt;The Fucino basin was struck by a M&lt;sub&gt;w&lt;/sub&gt;=7.0 earthquake on January 13, 1915, causing 30,000 causalities within a large area surrounding the basin. At present, the area is characterized by scarce instrumental seismicity with low magnitude.&amp;#160; Our analysis highlights a good correlation between NW-SE and NE-SW well-known faults and clear gravimetric MDA maxima bordering the plain. This area can be currently considered silent but, from historical seismological studies, it is one the highest seismic risk areas of Central Apennines.&lt;/p&gt;&lt;p&gt;Moreover, we investigated the area of the Sulmona basin, the southwards extension of the eastern system of Central Apennines developing from Mt. Vettore, Mt. Gorzano and Mt. Gran Sasso. In historical times, the faults of the most external extensional alignment, defined as silent and considered as probable seismic gaps, activated during the 2016 Amatrice&amp;#8211;Visso&amp;#8211;Norcia seismic sequence. Further to the southeast, two relatively large earthquakes occurred on the eastern flank of Mt. Maiella on November 3, 1706 (M&lt;sub&gt;w&lt;/sub&gt;=6.6) and on September 26, 1933 (M&lt;sub&gt;w&lt;/sub&gt;=5.7). The Sulmona area is presently characterized by poor and low magnitude instrumental seismicity. Our multi-parametric analysis highlighted a strong correlation between MDA maxima and the Mt. Morrone normal fault bordering the western side of Mt. Maiella and the eastern side of the Sulmona basin.&lt;/p&gt;

Response and initial scientific findings from the southwestern Puerto Rico 2020 Seismic Sequence

Temblor ◽  
2020 ◽  
Author(s):  
Alberto López ◽  
K. Stephen Hughes ◽  
Thomas Hudgins ◽  
Elizabeth Vanacore ◽  
Gisela Báez-Sánchez
Keyword(s):  
Puerto Rico ◽  
Seismic Sequence

scholarly journals Failure Analysis of Apennine Masonry Churches Severely Damaged during the 2016 Central Italy Seismic Sequence

Buildings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 58 ◽  
Author(s):  
Francesco Clementi
Keyword(s):  
Case Studies ◽  
Central Italy ◽  
Numerical Data ◽  
Sensitivity Study ◽  
Nonlinear Material ◽  
Seismic Sequence ◽  
Nonlinear Approach ◽  
Nonlinear Static ◽  
Masonry Churches ◽  
Global And Local

This paper presents a detailed study of the damages and collapses suffered by various masonry churches in the aftermath of the seismic sequence of Central Italy in 2016. The damages will first be analyzed and then compared with the numerical data obtained through 3D simulations with eigenfrequency and then nonlinear static analyses (i.e., pushover). The main purposes of this study are: (i) to create an adequately consistent sensitivity study on several definite case studies to obtain an insight into the role played by geometry—which is always unique when referred to churches—and by irregularities; (ii) validate or address the applicability limits of the more widespread nonlinear approach, widely recommended by the Italian Technical Regulations. Pushover analyses are conducted assuming that the masonry behaves as a nonlinear material with different tensile and compressive strengths. The consistent number of case studies investigated will show how conventional static approaches can identify, albeit in a qualitative way, the most critical macro-elements that usually trigger both global and local collapses, underlining once again how the phenomena are affected by the geometry of stones and bricks, the texture of the wall face, and irregularities in the plan and elevation and in addition to hypotheses made on the continuity between orthogonal walls.

scholarly journals Fluvial inverse modeling for inferring the timing of Quaternary uplift in the Simbruini range (Central Apennines, Italy)

2021 ◽  
Author(s):  
Michele Delchiaro ◽  
Veronica Fioramonti ◽  
Marta Della Seta ◽  
Gian Paolo Cavinato ◽  
Massimo Mattei
Keyword(s):  
Inverse Modeling ◽  
Central Apennines
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