Seismic evidence of longitudinal extension in the Southern Apennines chain (Italy): The 1997-1998 Sannio-Matese seismic sequence

2002 ◽  
Vol 29 (20) ◽  
pp. 65-1-65-4 ◽  
Author(s):  
G. Milano ◽  
G. Ventura ◽  
R. Di Giovambattista
Keyword(s):  
Seismic Sequence ◽  
Southern Apennines ◽  
Longitudinal Extension

Earthquake swarms in the Southern Apennines chain (Italy): the 1997 seismic sequence in the Sannio–Matese mountains

1999 ◽  
Vol 306 (1) ◽  
pp. 57-78 ◽  
Author(s):  
Girolamo Milano ◽  
Rita Digiovambattista ◽  
Giuliana Alessio
Keyword(s):  
Earthquake Swarms ◽  
Seismic Sequence ◽  
Southern Apennines

Large-scale longitudinal extension in the southern Apennines contractional belt, Italy

Geology ◽  
1993 ◽  
Vol 21 (12) ◽  
pp. 1123 ◽  
Author(s):  
John S. Oldow ◽  
Bruno D'Argenio ◽  
Luigi Ferranti ◽  
Gerardo Pappone ◽  
Ennio Marsella ◽  
...  
Keyword(s):  
Large Scale ◽  
Southern Apennines ◽  
Longitudinal Extension

Large-scale longitudinal extension in the southern Apennines contractional belt, Italy: Comment and Reply

Geology ◽  
1994 ◽  
Vol 22 (9) ◽  
pp. 860
Author(s):  
Francesca Ghisetti ◽  
Livio Vezzani ◽  
J. S. Oldow ◽  
B. D'Argenio ◽  
L. Ferranti ◽  
...  
Keyword(s):  
Large Scale ◽  
Southern Apennines ◽  
Longitudinal Extension

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

<p>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.</p><p>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.</p><p>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’ 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.</p><p>We tested the effectiveness of this multi-method approach at Mt. Vettore-Mt. Bove, L’Aquila basin, Mt. Massico and San Giuliano di Puglia areas (Central and Southern Apennines).</p><p>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.</p><p>The Matese area was hit by a seismic sequence in 2013-2014 (M<sub>wmax</sub>= 5.1 on December 29, 2013). Our approach showed a correlation between the epicentral distribution of the 2013-2014 Matese seismic sequence (M<sub>w</sub>=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.</p><p>The Fucino basin was struck by a M<sub>w</sub>=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.  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.</p><p>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–Visso–Norcia seismic sequence. Further to the southeast, two relatively large earthquakes occurred on the eastern flank of Mt. Maiella on November 3, 1706 (M<sub>w</sub>=6.6) and on September 26, 1933 (M<sub>w</sub>=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.</p>

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

Thermal structure of the southern Apennines along the Val d'Agri-Bari transect

2014 ◽  
Vol 32 ◽  
pp. 3-6
Author(s):  
Stefania Candela ◽  
Stefano Mazzoli ◽  
Antonella Megna ◽  
Stefano Santini
Keyword(s):  
Thermal Structure ◽  
Southern Apennines

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.

Alternative pulmonary artery reconstruction technique in the arterial switch operation

2021 ◽  
Author(s):  
Hisayuki Hongu ◽  
Masaaki Yamagishi ◽  
Yoshinobu Maeda ◽  
Keiichi Itatani ◽  
Masatoshi Shimada ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Arterial Switch Operation ◽  
Late Complication ◽  
Late Complications ◽  
Reconstruction Technique ◽  
Reconstruction Method ◽  
Arterial Switch ◽  
Switch Operation ◽  
Longitudinal Extension

Abstract OBJECTIVES Late complications of arterial switch operations (ASO) for transposition of the great arteries, such as neo-pulmonary artery (PA) stenosis and/or neoaortic regurgitation, have been reported. We developed an alternative reconstruction method called the longitudinal extension (LE) method to prevent PA bifurcation stenosis (PABS). METHODS We identified 48 patients diagnosed with transposition of the great arteries and performed ASO using the Lecompte manoeuvre for neo-PA reconstruction. In 9 consecutive patients (from 2014), the LE method was performed (LE). Before 2014, conventional techniques were performed in 39 patients (C). The median body weight and age in the LE and C groups were 3.0 and 3.1 kg and 12 and 26 days, respectively. In the LE group, 1 patient underwent bilateral PA banding before ASO. In C, PA banding and arch repair were performed in 1 patient each. Patients who received concomitant procedures were included. RESULTS The median follow-up in LE and C groups was 1.9 and 10.1 years, respectively. Early mortality/late death was not found in group LE and in 1 patient in group C. Only 1 case required ascending aorta sliding plasty in LE, and 8 patients needed PA augmentation for PABS in C. The median velocity of right/left PA was measured as 1.6/1.9 m/s in LE and 2.1/2.3 m/s in C, so it showed a lower value in LE. CONCLUSIONS Excellent mid-term results were obtained with the LE method. It was considered a useful procedure in preventing PABS, which is a primary late complication of ASO. Further follow-up and investigations are needed.

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