Luciano Telesca

Luciano Telesca
Italian National Research Council | CNR · Institute of Methologies for Environmental Analysis

About

417
Publications
47,187
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6,055
Citations
Citations since 2017
98 Research Items
2695 Citations
20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500

Publications

Publications (417)
Presentation
Full-text available
Since the dawn of earthquake science, a clear split has risen between theoretical seismology and statistical seismology. While the physics of coseismic rupture can be described by using a classical approach, the statistical patterns of seismicity are described by power laws produced by collective processes generated by many-scales nonlinear coopera...
Article
Full-text available
The main goal of this study was to evaluate the potential of the Fisher-Shannon statistical method applied to the MODIS satellite time series to search for and explore any small multiyear trends and changes (herein also denoted as inner anomalies) in vegetation cover. For the purpose of our investigation, we focused on the vegetation cover of three...
Article
In this work the time dynamics of GPS time series recorded at the Campi Flegrei caldera from 2000 to 2019 was investigated by using the Fisher Information Measure (FIM) and the Shannon entropy power (SEP), two informational methods that allow the detection of changes in the dynamical behavior of a complex system, like the volcanic one, quantifying...
Article
Full-text available
The MODIS Aqua and Terra Normalized Difference Vegetation Index (NDVI) and Enhanced Vegetation Index (EVI) time series acquired during nearly two decades (2000 to 2020) covering the area burned by the Camp Fire (California) in 2018 is investigated in this study by using the multifractal detrended fluctuation analysis in relation to the recovery pro...
Article
Full-text available
Assessing the stability state of fault interfaces is a task of primary interest not only for seismic hazards, but also for understanding how the earthquake machine works. Nowadays it is well known that a relationship exists between slow and fast earthquakes; moreover, it is more and more evident that such a connection is quite diffuse all over the...
Article
Full-text available
Electrical Resistivity Tomography (ERT) is a robust and well-consolidated method largely applied in near-surface geophysics. Nevertheless, the mapping of the spatial resistivity patterns of the subsurface at a depth greater than 1 km was performed in just a few cases by the ERT method, called deep ERT (DERT). Since, in many cases, the term DERT was...
Article
Full-text available
In this study, the visibility graph analysis of seismicity triggered by Song Tranh 2 hydro-power (Vietnam) is performed. The relationship between the seismic (the Gutenberg-Richter b-value) and topological (the k-M slope) parameters of seismicity is analysed. Our findings indicate that the relationship between the Gutenberg-Richter b-value and the...
Presentation
Full-text available
Since the dawn of the modern science of earthquakes, a clear split has risen among theoretical and statistical seismology and tectonics. Classical seismology explains what happens during a few seconds of fault slip following rock breakdown, with the consequent radiation of seismic waves, while statistical seismology describes how seismicity occurs...
Poster
Full-text available
The stability state of fault systems is mainly controlled by the frictional properties of weak interfaces and the available energy accumulated in the volumes beside them. Heterogeneities, roughness, and topological features play a key role in driving seismic dynamics and tectonic stress dissipation. However, the physics of the processes fostering m...
Article
Full-text available
The reservoir-triggered seismicity at the Song Tranh 2 reservoir in Vietnam is investigated by using Shannon entropy, a well-known informational method used to analyze complexity in time series in terms of disorder and uncertainty. The application of the time-varying Shannon entropy to the time series of the interevent times of seismicity has evide...
Article
Vegetation dynamic processes influenced by fires has represented a scientific topic of great importance because of the environmental impact of fires. The use of satellites to investigate vegetational trends has become quite common for the wide coverage and high spatial resolution of satellite images. In this paper, we study the temporal variability...
Article
Full-text available
Faults become more and more responsive to stress perturbations as instability mounts. We utilize this property in order to identify the different phases of the seismic cycle. Our analysis provides new insights about the features of impending mainshocks, which are proposed to emerge from a large-scale crustal-weakening preparation process whose dura...
Article
Full-text available
The Gutenberg-Richter law and the Omori law are both characterized by a scaling behavior. However, their relation is still an open question. Although several hypotheses have been formulated, a comprehensive geophysical mechanism is still missing to explain the observed variability of the scaling exponents b-value and p-value, e.g., correlating the...
Article
Full-text available
Bayesian inference shows that the distribution of the future event not only depends on the past events (prior), but also depends on the relation between the past and the future events (likelihood). However, the classical Bayesian methods do not consider the important contributions of recent data. In this paper, we propose a new Bayesian inference-b...
Article
Neural networks have been successfully applied for modeling time series. However, the results of long-term prediction are not satisfied. In this paper, the modified Meta-Learning is applied to the neural model. The normal Meta-Learning is modified by time-varying learning rates and adding a momentum term to improve convergence speed and robustness...
Article
Full-text available
Seismic prediction was considered impossible, however, there are no reasons in theoretical physics that explicitly prevent this possibility. Therefore, it is quite likely that prediction is made stubbornly complicated by practical difficulties such as the quality of catalogs and data analysis. Earthquakes are sometimes forewarned by precursors, and...
Article
The prediction of the magnitude of an earthquake is still a challenge in the studies of seismic processes. The machine learning approaches have been developed recently to predict only the magnitude of next incoming earthquake using historical data. In this study, we combine neural networks with the meta-learning to predict not only the magnitude of...
Article
We are currently far from being able to make an accurate and timely prediction of earthquakes, that can tell us even roughly Where will it occur? When will it occur? What will its magnitude be? And at what depth will it occur? However, this information would be incredibly valuable to avoid loss of lives, damage to constructions, and a great economi...
Article
Full-text available
The time dynamics of the instrumental seismicity (1 ≤ ML ≤ 4.7) recorded in the area of Song Tranh 2 reservoir (Vietnam) between September 2012 and March 2020 was analyzed in this study. The daily maximum of the water level was analyzed by means of the periodogram, while the earthquake sequence was analyzed by using the Schuster spectrum, which is...
Article
Full-text available
Temperature and composition at fumaroles are controlled by several volcanic and exogenous processes that operate on various time-space scales. Here, we analyze fluctuations of temperature and chemical composition recorded at fumarolic vents in Solfatara (Campi Flegrei caldera, Italy) from December 1997 to December 2015, in order to better understan...
Article
Full-text available
The seismo-electrical coupling is critical to understand the mechanism of geoelectrical precursors to earthquakes. A novel seismo-electrical model, called Chen–Ouillon–Sornette (COS) model, has been developed by combining the Burridge–Knopoff spring-block system with the mechanisms of stress-activated charge carriers (i.e., electrons and holes) and...
Article
Atmospheric pollution in Mexico City Metropolitan Area (MCMA) represents a serious social and economic concern due to the very high population density. The most important industrial activities are the main responsible of the production of particulate matter PM10 that can damage seriously the human respiratory system. In the present study we investi...
Article
High frequency data from the city of Petrolina, Northeast Brazil, are used to find the wind speed projection series at different angles, which are then analyzed by using several statistical tools: detrended fluctuation analysis (DFA), multifractal detrended fluctuation analysis (MFDFA) and Fisher–Shannon analysis (FSA). It is found that α, the DFA...
Article
Full-text available
Considerable amount of surface water in Lebanon is stored behind dams, and the Qaraaoun Reservoir (QR) is a typical example. It is the largest surface water body in Lebanon where it irrigates 27,500 ha and generates 22% of Lebanon’s electricity. The reservoir is fed directly from the Litani River which receives water from several springs and from g...
Article
A Bayesian approach has been applied to estimate the distribution of magnitudes, interevent distances and times of earthquakes occurred in 2017 in central Italy by using a small amount of random samples drawn from the distribution of the same seismic parameters for the earthquakes occurred in 2014-2016. We applied the method to the whole and afters...
Article
Full-text available
The temporal variations of the instrumental seismicity (0.5 ≤ML ≤ 3.5) recorded in the Mingechevir area (Azerbaijan) between January 2010 to December 2018 and its relationship with the level variation of the water reservoir was analysed in this study. The monthly number of events was analysed by using the correlogram-based periodogram, the singular...
Article
Full-text available
The intraplate and interplate seismic catalogues of Iquique (Chile) area were investigated by using seismological (b value of the Gutenberg–Richter law), fractal (Allan Factor and detrended fluctuation analysis) and topological (Horizontal Visibility Graph) methods. The two catalogues show different stress state indicated by the different b value,...
Article
We applied the informational approach of the Fisher-Shannon method to study the time series of Standardized Precipitation Index (SPI) derived from monthly rainfall data at 133 gauging stations in Northeast (NE) Brazil. The climate in the study region ranges from tropical humid in the coastal area Zona de Mata to tropical semiarid inland Sertão, pas...
Article
Full-text available
This study investigates the relationship between the b value of the Gutenberg–Richter law and the so-called k–M slope, a topological parameters, derived from the visibility graph analysis, that recently has been gaining great attention in describing the time dynamics of seismicity. The relationship has been already found to be nearly linear for sev...
Article
Full-text available
An improved pattern informatics (PI) method, inspired by the soup-of-groups model, is developed in this study. This improved method reveals its potential in reducing the noise that, when the classical PI is applied, can yield misleading conclusions about the existence of “hotspots” in the vicinity of the epicenter of a strong earthquake. The applic...
Article
In this study, we investigate the relationship between topological and seismological parameters of earthquake sequences generated by the Olami–Feder–Christensen (OFC) [Olami et al., Phys. Rev. Lett. 68(8), 1244 (1992)] spring-block model and converted in undirected graphs by using the visibility graph method [Lacasa et al., Proc. Natl. Acad. Sci. U...
Article
We analyze the time clustering phenomenon in sequences of extremes of time series generated by the fractional Ornstein-Uhlenbeck (fO-U) equation as the source of long-term correlation. We used the percentile-based definition of extremes based on the crossing theory or run theory, where a run is a sequence of L contiguous values above a given percen...
Article
Full-text available
In this paper seismic hazard for the sourthern slope of the Greater Caucasus (Azerbaijan) was assessed by using five major parameters: moment magnitude, simulated peak ground acceleration (PGA) from four target earthquakes, intensity scenario, amplification factor and b value. The deterministic scenario-based seismic hazard assessment method was ap...
Article
Full-text available
Azerbaijan is characterized by a strong level of seismicity with earthquakes concentrated within several active areas. In this study, we calculated the source mechanism of earthquakes occurring in the northeastern part of Azerbaijan, by using the digital waveform data recorded by the Republican Seismic Survey Center (RSSC) at the Azerbaijan Nationa...
Article
Full-text available
The analysis of vegetation dynamics affected by wildfires contributes to the understanding of ecological changes under disturbances. The use of the Normalized Difference Vegetation Index (NDVI) of satellite time series can effectively contribute to this investigation. In this paper, we employed the methods of multifractal detrended fluctuation anal...
Article
In this paper, the time series of contact force among pedestrians in two different crowding conditions is analysed by using the correlogram-based periodogram and the Fisher–Shannon method to investigate their spectral and informational properties, respectively. The overcrowding was simulated by controlled experiments carried out at University of Sc...
Article
Full-text available
Geoelectric self‐potential (SP) signals are sensitive to natural and anthropogenic factors. The SP spectral characteristics under the different factors in Taiwan were investigated and the SP spectral scalings were correlated with urbanization level, seismicity, and crustal deformation. The ambient SP noise models were first established by estimatin...
Article
In this paper, we analyze the informational properties of time series of slip velocity generated by the Langevin equation of friction in two different frictional regimes: viscous and Coulombian. Representing the generated time series in the Fisher-Shannon plane (where the coordinate axes are the Fisher Information Measure and the Shannon entropy po...
Article
Full-text available
This study aims at investigating several dynamical parameters of the monthly variability of eight streamflow time series, recorded at different stations along the major courses and springs of the Litani River (Lebanon). The contribution of the annual periodicity to the total variance of the series depends on the geomorphological characteristics of...
Article
Full-text available
The 10-min average wind speed series recorded at 130 stations distributed rather homogeneously in the territory of Switzerland are investigated. Fixing a percentile-based threshold of the wind speed distribution, a wind extreme is defined as the duration of the sequence of consecutive wind values above the threshold. This definition allows to analy...
Conference Paper
Full-text available
Seismological research importance around the globe is very clear, therefore new tools and algorithms are needed in order to predict magnitude, time and geographic location, as well as found out relationships that allow us to understand better this phenomenon and thus be able tosave countless human lives. However, given the highly random nature of t...
Conference Paper
Full-text available
Bayesian statistical procedures are well known for estimating the probability distribution of the occurrence of an event. In this study, we applied the Bayesian statistical method to estimate the distribution of magnitudes of earthquakes that occurred in central Italy in two different time periods. Using the Monte Carlo sampling method, we recovere...
Article
In this study, the 10-min average wind speed series recorded at 132 stations distributed rather homogeneously over the territory of Switzerland were investigated, focusing on the challenging problem of the analysis and modelling of wind extreme events. Wind extremes are defined as a sequence of consecutive values above a percentile-based threshold...
Article
Full-text available
Water scarcity has been well pronounced in the Middle East Region; however, Lebanon is still characterized by wet climate and sufficient water resources. It is a paradox that Lebanon is now under water stress, and many contradictory studies on the climate of Lebanon attributed water stress to the changing climate. Most of these studies were applied...
Poster
Full-text available
Complex networks are gaining popularity in describing the cooperative behavior within a complex system involving relationships among its constituent units. A network can easily present a wind speed-monitoring system, by considering the measuring stations as nodes and the links by a linear or non-linear metric. This work presents two applications o...
Article
The safety hazard and the additional costs on transportation due to road accidents invite the necessity to minimize their impact. In this paper, we study the spatial-clustering behavior and hazard vulnerability of car accidents that occurred in Lebanon between 2015 and 2018. Assessment of spatial clustering of accidents and hot spots densities were...
Article
High frequency wind time series measured at different heights from the ground (from 1.5 to 25.5 meters) in an urban area were investigated by using the variance of the coefficients of their wavelet transform. Two ranges of scales were identified, sensitive to two different dynamical behavior of the wind speed: the lower anemometers show higher wave...
Article
A mutual information-based weighted network representation of a wide wind speed-monitoring system in Switzerland was analyzed in order to detect communities. Two communities have been revealed, corresponding to two clusters of sensors situated, respectively, on the Alps and on the Jura-Plateau that define the two major climatic zones of Switzerland...
Article
In this paper, high frequency wind time series measured at different heights from the ground (from 5.5 to 25.5 m) in an urban area were investigated. The spectrum of each series is characterized by a power-law behaviour at low frequency range, with a mean spectral exponent of about 1.5, which is rather consistent with the Kolmogorov spectrum of atm...
Article
In this paper, the time dynamics of the daily means of wind speed measured in complex mountainous regions are investigated. For 293 measuring stations distributed over all Switzerland, the Fisher information measure and the Shannon entropy power are calculated. The results reveal a clear relationship between the computed measures and both the eleva...
Article
Full-text available
Lebanon, with its geographic location facing the Mediterranean Sea and dominant rugged topography, is characterized by a strong climatic variability even between zones located few kilometres apart. The investigation of the climatic indices is necessary to delineate such diverse climatic situation over Lebanon. In this context, this paper investigat...
Article
Full-text available
One-hertz wind time series recorded at different levels (from 1.5–25.5 m) in an urban area are investigated by using the Fisher–Shannon (FS) analysis. FS analysis is a well-known method to gain insight into the complex behavior of nonlinear systems, by quantifying the order/disorder properties of time series. Our findings reveal that the FS complex...
Preprint
Full-text available
1Hz wind time series recorded at different levels (from 1.5 to 25.5 meters) in an urban area are investigated by using the Fisher-Shannon (FS) analysis. FS analysis is a well known method to get insight of the complex behavior of nonlinear systems, by quantifying the order/disorder properties of time series. Our findings reveal that the FS complexi...
Article
Full-text available
The time variation of several statistical parameters describing the complex time dynamics of the seismicity of Azerbaijan from 2010 to 2016 is investigated. Besides the well-known Gutenberg–Richter b value and the coefficients of variation, two quantities, derived by the recent method of horizontal visibility graph are analysed, namely the mean con...
Preprint
Full-text available
High frequency wind time series measured at different heights from the ground (from 1.5 to 25.5 meters) in an urban area were investigated by using the variance of the coefficients of their wavelet transform. Two ranges of scales were identified, sensitive to two different dynamical behavior of the wind speed: the lower anemometers show higher wave...
Article
Full-text available
The time variation of several statistical parameters describing the complex time dynamics of the seismicity of Azerbaijan from 2010 to 2016 is investigated. Besides the well known Gutenberg-Richter b-value and the coefficients of variation, two quantities, derived by the recent method of horizontal visibility graph (HVG) are analysed, namely the me...
Article
Full-text available
In recent years, cases of newly emergent induced clusters have increased seismic hazard and risk in locations with social, environmental, and economic consequence. Thus, the need for a quantitative and robust means to discern induced seismicity has become a critical concern. This paper reviews a Matlab-based algorithm designed to quantify the stati...
Article
We studied the whole and aftershock-depleted shallow (depth ≤ 30 km) Taiwanese seismicity from 1990 to 2017 by using several independent methods. The coefficient of variations and the Allan Factor have revealed that time-clustering characterizes not only the time distribution of the whole seismic catalogue, but also that of the aftershock-depleted...
Article
This manuscript analyzes the temporal properties of sequences of car accidents in Lebanon from 2015 to 2018, using data from the Lebanese Road Accident Platform (LRAP). The Allan Factor that is a well suited methodology for investigating the time-clustering in point processes, revealed that the car accidents occurred over the whole Lebanese territo...
Preprint
Full-text available
A mutual information-based weighted network representation of a wide wind speed monitoring system in Switzerland was analysed in order to detect communities. Two communities have been revealed, corresponding to two clusters of sensors situated respectively on the Alps and on the Jura-Plateau that define the two major climatic zones of Switzerland....
Preprint
Full-text available
The 10-minute average wind speed series recorded at 132 stations distributed rather homogeneously in the territory of Switzerland are investigated. Wind extremes are defined on the base of run theory: fixing a percentile-based threshold of the wind speed distribution, a wind extreme is defined as a sequence of consecutive wind values (or duration o...
Preprint
In this paper, high frequency wind time series measured at different heights from the ground (from 5.5 to 25.5 meters) in an urban area were investigated. The spectrum of each series is characterized by a power-law behaviour at low frequency range, with a mean spectral exponent of about 1.5, which is rather consistent with the Kolmogorov spectrum o...
Article
The Visibility Graph method is applied to the inter-event times, inter-event distances and magnitude sequence of the seismicity occurred around the Enguri dam, Georgia from 1974 to 1989 and from 2009 to 2016, to calculate the so-called mean connectivity degree. The time variation of the mean connectivity degree of the three seismic series shows the...
Article
Full-text available
Normalized cross-correlation of effective functions was originally developed to differentiate induced and natural seismicity. We apply this methodology to data sets acquired during hydraulic stimulation of shale gas to study temporal relationship between seismicity and the injection. Delays of seismicity induced by hydraulic fracturing are compared...
Preprint
In this paper, the time dynamics of the daily means of wind speed measured in complex mountainous regions are investigated. For 293 measuring stations distributed over all Switzerland, the Fisher information measure and the Shannon entropy power are calculated. The results reveal a clear relationship between the computed measures and both the eleva...