scholarly journals Ground deformation and source geometry of the 24 August 2016 Amatrice earthquake (Central Italy) investigated through analytical and numerical modeling of DInSAR measurements and structural-geological data

2016 ◽  
Vol 43 (24) ◽  
pp. 12,389-12,398 ◽  
Author(s):  
G. Lavecchia ◽  
R. Castaldo ◽  
R. de Nardis ◽  
V. De Novellis ◽  
F. Ferrarini ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Ground Deformation ◽  
Central Italy ◽  
Geological Data ◽  
2016 Amatrice Earthquake ◽  
Source Geometry

scholarly journals Source Model of the 2014 Mw 6.9 Yutian Earthquake at the Southwestern End of the Altyn Tagh Fault in Tibet Estimated from Satellite Images

2020 ◽  
Vol 91 (6) ◽  
pp. 3161-3170
Author(s):  
Xing Li ◽  
Wenbin Xu ◽  
Sigurjón Jónsson ◽  
Yann Klinger ◽  
Guohong Zhang
Keyword(s):  
Ground Deformation ◽  
Source Parameters ◽  
Source Model ◽  
Coseismic Slip ◽  
Remote Sensing Technology ◽  
Sensing Technology ◽  
Altyn Tagh ◽  
Coulomb Failure Stress Change ◽  
Coulomb Failure ◽  
Source Geometry

Abstract Multiple fault segments ruptured during the 2014 Yutian earthquake, but the detailed source parameters and the mechanism of rupture complexity remain poorly understood. Here, we use high-resolution TanDEM-X satellite data and Satellite Pour l’Observation de la Terre-6/7 images to map the coseismic ground deformation field of the event. We find that the majority of coseismic slip occurred in the upper 10 km with the maximum left-lateral fault slip of ∼2.5  m at ∼6  km depth. The fault ruptured across a large 4.5 km extensional stepover from one left-lateral fault segment to another, with some right-lateral relay faulting in between. We find that the earthquake was followed by shallow afterslip concentrating at the southwestern end of coseismic rupture, in an area of many aftershocks and positive Coulomb failure stress change. Our findings demonstrate the power of satellite remote sensing technology in constraining source geometry and slip model of complex earthquakes when ground measurements are limited.

Analysis of Ground Deformation Detected Using the SBAS-DInSAR Technique in Umbria, Central Italy

2009 ◽  
Vol 166 (8-9) ◽  
pp. 1425-1459 ◽  
Author(s):  
Fausto Guzzetti ◽  
Michele Manunta ◽  
Francesca Ardizzone ◽  
Antonio Pepe ◽  
Mauro Cardinali ◽  
...  
Keyword(s):  
Ground Deformation ◽  
Central Italy

scholarly journals Insights into Seismogenetic Areas in Central Italy from Combined Absolute Gravity and GNSS Measurements

2021 ◽  
Vol 13 (22) ◽  
pp. 4649
Author(s):  
Filippo Greco ◽  
Federica Riguzzi ◽  
Giovanna Berrino
Keyword(s):  
Ground Deformation ◽  
High Reliability ◽  
Gravity Data ◽  
Central Italy ◽  
The Other ◽  
Quality Data ◽  
Absolute Gravity ◽  
Set Up ◽  
Gnss Network ◽  
Gnss Measurements

In this study we present and discuss gravity and ground deformation variations, at different time scales, observed in a wide mesh absolute gravity and GNSS network set up in central Italy. The network was installed in the area affected by the 2009 (L’Aquila; Mw 6.1) and 2016 (Amatrice-Norcia; Mw 6.0 and 6.5) seismic activity, in order to verify if gravity and ground deformation variations could be related to seismic effects. The new network includes 5 stations distributed between the Lazio, Umbria, and Abruzzo regions. From 2018 to 2020 three campaigns were carried out using the transportable Micro-g LaCoste FG5#238 and the portable Micro-g LaCoste A10#39 absolute gravimeters and completed with two simultaneous GNSS measurements. Topographic instruments, measurement and analysis techniques enabling accurate measurements in the positioning of the stations and to control their variations over time were applied. The high reliability and accuracy of the absolute gravity data gathered, after being corrected for known effects, showed a negative short-term (2018–2020) pattern throughout the area, up to −30 µGal. Since some stations of the new network coincided with benchmarks already measured in the past, an analysis of long-term gravity changes was carried out and a fair degree of stability was observed in two stations, while positive large variations, of approximately 70 and 157 µGal, were recorded in the other two stations in the time intervals 1954–2020 and 2005–2010, respectively. On the other hand, variations highlighted by GNSS height measurements were all below 3 cm. Here, the first long-lasting gravity measurements carried out with absolute gravimeters in a seismic area in Italy are presented, providing meaningful geophysical information. The obtained results, in terms of availability of a combined absolute gravity and GNSS network, definition of data acquisition and analysis procedures, as well as creation of a high quality data archive, lay the foundations for a multidisciplinary approach towards improving the knowledge of this seismogenetic area of Italy.

scholarly journals Analysis of the 2016 Amatrice earthquake macroseismic data

2016 ◽  
Vol 59 ◽  
Author(s):  
Lorenzo Hofer ◽  
Mariano Angelo Zanini ◽  
Flora Faleschini
Keyword(s):  
Critical Analysis ◽  
Seismic Event ◽  
Residential Buildings ◽  
Central Italy ◽  
Macroseismic Data ◽  
Significant Damage ◽  
Macroseismic Scale ◽  
The University ◽  
2016 Amatrice Earthquake ◽  
Macroseismic Survey

On August 24, 2016, a sudden MW 6.0 seismic event hit Central Italy, causing 298 victims and significant damage to residential buildings and cultural heritage. In the days following the mainshock, a macroseismic survey was conducted by teams of the University of Padova, according to the European Macroseismic Scale (EMS98). In this contribution, a critical analysis of the collected macroseismic data is presented and some comparisons were performed with the recent 2012 Emilia sequence.

How to manage a monitoring service based on satellite interferometry: a practical approach from the Tuscany region (central Italy)

2020 ◽  
Author(s):  
Matteo Del Soldato ◽  
Lorenzo Solari ◽  
Federico Raspini ◽  
Silvia Bianchini ◽  
Andrea Ciampalini ◽  
...  
Keyword(s):  
Time Series Data ◽  
Ground Deformation ◽  
Central Italy ◽  
General Information ◽  
Series Data ◽  
Data Mining Algorithm ◽  
Potential Threat ◽  
Field Campaign ◽  
Monitoring Service ◽  
Regional Authorities

<p>Thanks to the launch of the ESA’s Sentinel-1 constellation the scientific community re-evaluated the way to use these data, shifting from a static view of the territory to a continuous streaming of ground motion measurements from space. The Tuscany region (central Italy) has been the first worldwide region to adopt a satellite continuous monitoring service for ground deformation. Taking advantage from the wide area coverage, short revisiting time, cost efficiency and non-invasiveness of the satellite interferometric techniques, in addition to the increased processing capabilities, it was possible to set up a 12 days updated system. The processing chain combines the SqueeSAR algorithm and a time-series data mining algorithm aimed to highlight benchmarks, named “anomalous points”, with significant trend variations. The anomalous points are radar-interpreted in order to classify all of them according to possible causes (e.g. landslide, subsidence, uplift, mining activity). The results of each update of the service are delivered to the regional authorities in the form of a bulletin. It contains a map of the tuscan municipalities differently coloured according to the number of anomalous points, their persistence and relevance. In case of anomalous points representing a potential threat, a field campaign for field-verifying the situation and the potential active phenomena is conducted.</p><p>A sheet survey has been realized for the field campaign in order to collect several useful information with the final aim of qualitatively estimating the risk and suggesting short-term actions to be taken by local entities. It is useful to have a complete vision on several elements following a sort of checklist (i.e. general information for describing the phenomena, intensity of the event noting down the damage, exposure of elements) drastically reducing the subjectivity of the surveyors. The whole procedure, from the download and processing of the satellite raw images to the field surveys, requires less than 10 days. The monitoring service provides extremely useful information for prevention, monitoring and risk management activities related to hydrogeological phenomena. Another important consequence is the raised awareness of local and regional authorities in terms of geohazards affecting their territories.</p>

Numerical Modeling of Lateral Earth Pressure Acting on Box Culvert under the Ground Deformation

2014 ◽  
Vol 577 ◽  
pp. 1166-1169
Author(s):  
Jun Wu Xia ◽  
Guo Tao Dou ◽  
Di Wang ◽  
Zhen Hua Lu
Keyword(s):  
Finite Element ◽  
Numerical Modeling ◽  
Ground Deformation ◽  
Earth Pressure ◽  
Mining Subsidence ◽  
Damage Potential ◽  
Finite Element Software ◽  
Lateral Earth Pressure ◽  
Box Culvert ◽  
The Way

Box culvert affected by mining subsidence is exposed to damage potential in relation to the lateral earth pressure. This study intends to specify and compare different ground deformation by the mining subsidence effect in box culvert. For this purpose, a finite-element software (ANSYS) is used to generate models incorporating the soil and a box culvert. The results shows that the lateral earth pressure of box culvert was related to the way of ground deformation, In addition, the kind of soil also affected the distribution and value of the lateral earth pressure.

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