Alejandro Ramírez-Rojas
YOU?
Author Swipe
View article: Natural time analysis of the corrected Mexican seismic catalog using complexity measures
Natural time analysis of the corrected Mexican seismic catalog using complexity measures Open
Natural time analysis (NTA) provides a powerful method to uncover dynamic features hidden behind seismic catalogs and identify when the system enters a critical stage before a major earthquake. In this paper, we perform a NTA of the correc…
View article: Informational and Topological Characterization of CO and O3 Hourly Time Series in the Mexico City Metropolitan Area During the 2019–2023 Period: Insights into the Impact of the COVID-19 Pandemic
Informational and Topological Characterization of CO and O3 Hourly Time Series in the Mexico City Metropolitan Area During the 2019–2023 Period: Insights into the Impact of the COVID-19 Pandemic Open
The main anthropogenic sources of air pollution in big cities are vehicular traffic and industrial activities. The emissions of primary pollutants are produced directly from the combustion of fossil fuels of vehicles and industry, whilst t…
View article: Novel experimental design for the study of seismic processes based on the stick-slip mechanism.
Novel experimental design for the study of seismic processes based on the stick-slip mechanism. Open
Seismicity is the result of the interaction between tectonic plates in relative motion where the underlying mechanism of earthquake generation in seismic subduction areas is stick-slip. In reality, seismicity is a complex phenomenon as it …
View article: Non-Extensive Statistical Analysis of Seismicity on the West Coastline of Mexico
Non-Extensive Statistical Analysis of Seismicity on the West Coastline of Mexico Open
Mexico is a well-known seismically active country, which is primarily affected by several tectonic plate interactions along the southern Pacific coastline and by active structures in the Gulf of California. In this paper, we investigate th…
View article: Non-Extensive Statistical Analysis of Seismicity in the West Coastline of Mexico
Non-Extensive Statistical Analysis of Seismicity in the West Coastline of Mexico Open
Mexico is a well-known seismically active country, which is primarily affected by several tectonic plate interactions along the southern Pacific coastline and by active structures in the Gulf of Baja California. In this paper we investigat…
View article: Nicaragua seismicity study in terms of entropy fluctuations in natural time domain
Nicaragua seismicity study in terms of entropy fluctuations in natural time domain Open
Nicaragua is located on the western margin of the Caribbean plate near its interaction with the Cocos plates. The Caribbean plate is surrounded by four major tectonic plates: Cocos at the southwest, Nazca at the south, the North American a…
View article: Non-extensivity study of the seismicity along the Mexican Pacific coast based on the Tsallis q-statistical approach.
Non-extensivity study of the seismicity along the Mexican Pacific coast based on the Tsallis q-statistical approach. Open
The Mexican Pacific coast has presented significant seismic activity due to the tectonic processes that have generated it. This coast, from Baja California until Chiapas is matched with three tectonic settings, to the north, a dispersion z…
View article: Improving the Estimation of the Occurrence Time of an Impending Major Earthquake Using the Entropy Change of Seismicity in Natural Time Analysis
Improving the Estimation of the Occurrence Time of an Impending Major Earthquake Using the Entropy Change of Seismicity in Natural Time Analysis Open
This article is focused on a new procedure concerning a more accurate identification of the occurrence time of an impending major earthquake (EQ). Specifically, we first recapitulate that, as was recently shown [P. Varotsos et al., Communi…
View article: Visibility Graph Analysis of the Seismic Activity of Three Areas of the Cocos Plate Mexican Subduction Where the Last Three Large Earthquakes (M > 7) Occurred in 2017 and 2022
Visibility Graph Analysis of the Seismic Activity of Three Areas of the Cocos Plate Mexican Subduction Where the Last Three Large Earthquakes (M > 7) Occurred in 2017 and 2022 Open
The understanding of the dynamical behavior of seismic phenomena is currently an open problem, mainly because seismic series can be considered to be produced by phenomena exhibiting dynamic phase transitions; that is, with some complexity.…
View article: Correlations of the seismic activity monitored in three subduction zones belonging to Cocos plate by using the visibility graph method.
Correlations of the seismic activity monitored in three subduction zones belonging to Cocos plate by using the visibility graph method. Open
The temporal sequences of magnitudes recorded in seismic active zones exhibit complex behavior which is associated with the wide diversity of scales of fractures sizes when an earthquake on the Earth’s crust occurs. Earthquakes can b…
View article: Tsallis q-Statistics in Seismology
Tsallis q-Statistics in Seismology Open
Non-extensive statistical mechanics (or q-statistics) is based on the so-called non-additive Tsallis entropy. Since its introduction by Tsallis, in 1988, as a generalization of the Boltzmann–Gibbs equilibrium statistical mechanics, it has …
View article: Nonlinear Statistical Features of the Seismicity in the Subduction Zone of Tehuantepec Isthmus, Southern México
Nonlinear Statistical Features of the Seismicity in the Subduction Zone of Tehuantepec Isthmus, Southern México Open
After the M8.2 main-shock occurred on 7 September 2017 at the Isthmus of Tehuantepec, Mexico, the spatial distribution of seismicity has showed a clear clusterization of earthquakes along the collision region of the Tehuantepec Transform/R…
View article: Visibility graph analysis to identify correlations in the magnitude earthquake time series monitored in the Tehuantepec Isthmus subduction zone, México.
Visibility graph analysis to identify correlations in the magnitude earthquake time series monitored in the Tehuantepec Isthmus subduction zone, México. Open
<p><span>The visibility graph method has allowed to identify statistical properties of earthquake magnitude time series. So that, such statistical features in the time series have helped to classify the earthquakes sequences in…
View article: Nowcasting and multifractal features of the seismicity in the subduction zone of Tehuantepec Isthmus, southern M&#233;xico
Nowcasting and multifractal features of the seismicity in the subduction zone of Tehuantepec Isthmus, southern México Open
<p>After the M8.2 earthquake occurred on September 07, 2017 at Isthmus of Tehuantepec, notable spatial and temporal changes where<br>registered, the temporal rate of occurrence increased and the spatial seismicity distribution …
View article: Natural Time Analysis of Seismicity within the Mexican Flat Slab before the M7.1 Earthquake on 19 September 2017
Natural Time Analysis of Seismicity within the Mexican Flat Slab before the M7.1 Earthquake on 19 September 2017 Open
One of the most important subduction zones in the world is located in the Mexican Pacific Coast, where the Cocos plate inserts beneath the North American plate. One part of it is located in the Mexican Pacific Coast, where the Cocos plate …
View article: Complexity measures and variability of the seismicity monitored whithin the Mexican flat slab before the main shock occurred on 19 September 2017
Complexity measures and variability of the seismicity monitored whithin the Mexican flat slab before the main shock occurred on 19 September 2017 Open
<p>Several subduction zones exists in Earth, which have a more or less known dynamic, however each of them has its particularities, as in the case of the Mexican subduction zone, where the flat slab is of special interest. The presen…
View article: Identifying the Occurrence Time of the Deadly Mexico M8.2 Earthquake on 7 September 2017
Identifying the Occurrence Time of the Deadly Mexico M8.2 Earthquake on 7 September 2017 Open
It has been shown that some dynamic features hidden in the time series of complex systems can be unveiled if we analyze them in a time domain termed natural time. In this analysis, we can identify when a system approaches a critical point …
View article: The Complexity Measures Associated with the Fluctuations of the Entropy in Natural Time before the Deadly México M8.2 Earthquake on 7 September 2017
The Complexity Measures Associated with the Fluctuations of the Entropy in Natural Time before the Deadly México M8.2 Earthquake on 7 September 2017 Open
We analyse seismicity during the 6-year period 2012–2017 in the new time domain termed natural time in the Chiapas region where the M8.2 earthquake occurred, Mexico’s largest earthquake in more than a century, in order to study the complex…