Editorial Board Members’ Collection Series: “New Horizons in Geophysics: From Theory to Applications”

A special issue of Geosciences (ISSN 2076-3263). This special issue belongs to the section "Geophysics".

Deadline for manuscript submissions: 30 September 2025 | Viewed by 6037

Special Issue Editors


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Guest Editor
Institute of Methodologies for Environmental Analysis, National Research Council, 85050 Tito, PZ, Italy
Interests: geophysical time series analysis; statistical methods for the investigation of geophysical processes; point processes; fractals and multifractals; graphs and networks; complexity; information theory
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Guest Editor
Dept. of Geophysics, Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv 69978, Tel Aviv, Israel
Interests: potential geophysical fields; tectonics; geodynamics; 3D models of the Earth's crust; paleomagnetic reconstructions; natural hazards; environmental geophysics; archaeological geophysics; searching for economic minerals
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, I. Metaxa & Vas. Pavlou Street, GR-15236 Penteli, Greece
Interests: space physics; space weather; geomagnetism; magnetic storms; complex systems; extreme geophysical events
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Special Issue Information

Dear Colleagues,

Geophysics represents dynamic research fields that delve into the intricate physical properties and processes that shape the Earth and its surrounding space environment. It utilizes standard and sophisticated statistical and quantitative methods to analyze the Earth’s processes. By integrating theoretical insights with observations, researchers in the field are striving to advance our understanding of natural phenomena (such as earthquakes, tsunamis, geomagnetic storms, volcanic eruptions, rainfall, etc.) and address pressing societal challenges.

This Special Issue aims to showcase cutting-edge research in geophysics, highlighting innovative methodologies and multi-disciplinary approaches. We welcome contributions from researchers worldwide, focusing on new investigations and presenting new data/methods of interest to a broader geosciences readership. We sincerely invite you to be part of this collaborative endeavor.

Dr. Luciano Telesca
Prof. Dr. Lev V. Eppelbaum
Dr. Georgios Balasis
Guest Editors

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Keywords

  • earthquakes
  • volcanoes
  • rainfall
  • tornado
  • tsunamis
  • geomagnetic storms
  • risk assessment
  • forecasting and early warning
  • satellite observations and applications
  • geological data analysis and modeling

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Published Papers (7 papers)

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Research

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21 pages, 35452 KiB  
Article
Integrated Geophysical Techniques to Investigate Water Resources in Self-Sustained Carbon-Farming Agroforestry
by John D. Alexopoulos, Vasileios Gkosios, Ioannis-Konstantinos Giannopoulos, Spyridon Dilalos, Antonios Eleftheriou and Simos Malamis
Geosciences 2025, 15(8), 317; https://doi.org/10.3390/geosciences15080317 - 13 Aug 2025
Viewed by 248
Abstract
The present paper deals with the combined application of near-surface geophysical techniques in a sustainable agriculture project. Their application is focused on the identification of any subsurface water in the context of sustainable water management for the selected living hub, located in the [...] Read more.
The present paper deals with the combined application of near-surface geophysical techniques in a sustainable agriculture project. Their application is focused on the identification of any subsurface water in the context of sustainable water management for the selected living hub, located in the semi-arid area of Agios Georgios-Mandra Attiki. The objective of the multidisciplinary geophysical study was to determine the depth of the bedrock and the thickness of the post-Alpine deposits. In addition, the subsurface karstification and the possible aquifer presence were examined. For that reason, the following techniques were implemented: Electrical Resistivity Tomography, Seismic Refraction Tomography, Ground-Penetrating Radar, and Very-Low Frequency electromagnetic technique. The study was also supported by drone LiDAR usage. The investigation revealed several hydrogeological characteristics of the area. The thickness of the post-Alpine sediments is almost 3 m. However, no shallow aquiferous systems have been developed in this formation, as indicated by their relatively high resistivity values (100–1000 Ohm.m). Furthermore, the alpine bedrock exhibits extensive karstification, facilitated by the development of fracture zones. The absence of an underlying impermeable layer prevented the development of aquiferous zones, at least up to a depth of 100 m. Full article
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26 pages, 13192 KiB  
Article
Investigating a Large-Scale Creeping Landmass Using Remote Sensing and Geophysical Techniques—The Case of Stropones, Evia, Greece
by John D. Alexopoulos, Ioannis-Konstantinos Giannopoulos, Vasileios Gkosios, Spyridon Dilalos, Nicholas Voulgaris and Serafeim E. Poulos
Geosciences 2025, 15(8), 282; https://doi.org/10.3390/geosciences15080282 - 25 Jul 2025
Viewed by 389
Abstract
The present paper deals with an inhabited, creeping mountainous landmass with profound surface deformation that affects the local community. The scope of the paper is to gather surficial and subsurface information in order to understand the parameters of this creeping mass, which is [...] Read more.
The present paper deals with an inhabited, creeping mountainous landmass with profound surface deformation that affects the local community. The scope of the paper is to gather surficial and subsurface information in order to understand the parameters of this creeping mass, which is usually affected by several parameters, such as its geometry, subsurface water, and shear zone. Therefore, a combined aerial and surface investigation has been conducted. The aerial investigation involves UAV’s LiDAR acquisition for the terrain model and a comparison of historical aerial photographs for land use changes. The multi-technique surface investigation included resistivity (ERT) and seismic (SRT, MASW) measurements and density determination of geological formations. This combination of methods proved to be fruitful since several aspects of the landslide were clarified, such as water flow paths, the internal geological structure of the creeping mass, and its geometrical extent. The depth of the shear zone of the creeping mass is delineated at the first five to ten meters from the surface, especially from the difference in diachronic resistivity change. Full article
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12 pages, 592 KiB  
Article
Twenty-Five Years After the Chi-Chi Earthquake in the Light of Natural Time Analysis
by Panayiotis A. Varotsos, Nicholas V. Sarlis, Efthimios S. Skordas, Qinghua Huang, Jann-Yenq Liu, Masashi Kamogawa and Toshiyasu Nagao
Geosciences 2025, 15(6), 198; https://doi.org/10.3390/geosciences15060198 - 24 May 2025
Viewed by 453
Abstract
Almost two years after the devastating 1999 MW7.6 Chi-Chi earthquake, a new concept of time termed natural time (NT) was introduced in 2001 that reveals unique dynamic features hidden behind the time series of complex systems. In particular, NT analysis enables [...] Read more.
Almost two years after the devastating 1999 MW7.6 Chi-Chi earthquake, a new concept of time termed natural time (NT) was introduced in 2001 that reveals unique dynamic features hidden behind the time series of complex systems. In particular, NT analysis enables the study of the dynamical evolution of a complex system and identifies when the system enters a critical stage. Since the observed earthquake scaling laws indicate the existence of phenomena closely associated with the proximity of the system to a critical point, here we apply NT analysis to seismicity that preceded the 3 April 2024 MW7.4 Hualien earthquake. We find that in the beginning of September 2023 the order parameter of seismicity exhibited a clearly detectable minimum. Such a minimum demonstrates that seismic electric signal (SES) activity initiated which comprises several low-frequency transient changes of the electric field of the Earth preceding major earthquakes. Full article
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20 pages, 14821 KiB  
Article
Seismic Facies Classification of Salt Structures and Sediments in the Northern Gulf of Mexico Using Self-Organizing Maps
by Silas Adeoluwa Samuel, Camelia C. Knapp and James H. Knapp
Geosciences 2025, 15(5), 183; https://doi.org/10.3390/geosciences15050183 - 19 May 2025
Viewed by 761
Abstract
Proper geologic reservoir characterization is crucial for energy generation and climate change mitigation efforts. While conventional techniques like core analysis and well logs provide limited spatial reservoir information, seismic data can offer valuable 3D insights into fluid and rock properties away from the [...] Read more.
Proper geologic reservoir characterization is crucial for energy generation and climate change mitigation efforts. While conventional techniques like core analysis and well logs provide limited spatial reservoir information, seismic data can offer valuable 3D insights into fluid and rock properties away from the well. This research focuses on identifying important structural and stratigraphic variations at the Mississippi Canyon Block 118 (MC-118) field, located on the northern slope of the Gulf of Mexico, which is significantly influenced by complex salt tectonics and slope failure. Due to a lack of direct subsurface data like well logs and cores, this area poses challenges in delineating potential reservoirs for carbon storage. The study leveraged seismic multi-attribute analysis and machine learning on 3-D seismic data and well logs to improve reservoir characterization, which could inform field development strategies for hydrogen or carbon storage. Different combinations of geometric, instantaneous, amplitude-based, spectral frequency, and textural attributes were tested using Self-Organizing Maps (SOM) to identify distinct seismic facies. SOM Models 1 and 2, which combined geometric, spectral, and amplitude-based attributes, were shown to delineate potential storage reservoirs, gas hydrates, salt structures, associated radial faults, and areas with poor data quality due to the presence of the salt structures more than SOM Models 3 and 4. The SOM results presented evidence of potential carbon storage reservoirs and were validated by matching reservoir sands in well log information with identified seismic facies using SOM. By automating data integration and property prediction, the proposed workflow leads to a cost-effective and faster understanding of the subsurface than traditional interpretation methods. Additionally, this approach may apply to other locations with sparse direct subsurface information to identify potential reservoirs of interest. Full article
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9 pages, 1766 KiB  
Communication
Estimating Secondary Earthquake Aftershocks from Tsunamis
by Sergey A. Arsen’yev and Lev V. Eppelbaum
Geosciences 2024, 14(12), 344; https://doi.org/10.3390/geosciences14120344 - 13 Dec 2024
Viewed by 1126
Abstract
Nonlinear solitary waves influence the Earth’s crust because wave pressure on the ocean bottom contains non-hydrostatic components. Our physical-mathematical model allows us to calculate the surplus super-hydrostatic pressure on the Earth’s crust. It depends on the amplitudes of solitary waves and the depth [...] Read more.
Nonlinear solitary waves influence the Earth’s crust because wave pressure on the ocean bottom contains non-hydrostatic components. Our physical-mathematical model allows us to calculate the surplus super-hydrostatic pressure on the Earth’s crust. It depends on the amplitudes of solitary waves and the depth of an ocean. The surplus wave pressure averages 50% from hydrostatic pressure on the shallow ocean shelves. Thus, the solitary wave’s tsunami class can provoke novel (repeated) earthquakes (or landslides) because surplus stresses affect the seismic focus. Theoretical results and experimental physical modeling of soliton waves have shown good agreement. A calculated example of the mega-tsunami in Lituya Bay and a described example of Dickson Fjord (AK, USA) indicate changes in the dynamic pressure after the onset of the tsunami. The presented studies demonstrate a first attempt at creating a numerical model of this phenomenon. Full article
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19 pages, 14600 KiB  
Article
Non-Linear Effects of Gravity Change on Mantle Dynamics
by Paolo Mancinelli, Giorgio Ranalli and Cristina Pauselli
Geosciences 2024, 14(11), 301; https://doi.org/10.3390/geosciences14110301 - 7 Nov 2024
Viewed by 1078
Abstract
Starting from observed variations of the length of day in the past 2.5 billion years, we calculate the corresponding gravity variation and evaluate the possible effects that such variation would have induced on the lithosphere and on mantle convection. The lithospheric stress induced [...] Read more.
Starting from observed variations of the length of day in the past 2.5 billion years, we calculate the corresponding gravity variation and evaluate the possible effects that such variation would have induced on the lithosphere and on mantle convection. The lithospheric stress induced by the observed gravity increase at the equator in 500 Ma is of the same order as the one associated with a convective cell. We model a gravity increase that would result in 1.3 × 10−2 µGal or 1.3 × 10−10 m s−2 over 10 years, a value that is not far from the detection thresholds of modern gravimeters. Gravity increase also affects mantle dynamics by improving convection efficiency. Our models demonstrate that gravity variations contribute to this phenomenon through faster and wider mixing. The results support a view where a convective system being subject to gravity changes responds through non-linear adjustments of its effective mixing at all scales. These findings contribute to a deeper understanding of how gravitational fluctuations may shape the behavior of Earth’s dynamic systems over geological timescales. Full article
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Review

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19 pages, 6515 KiB  
Review
North Caucasus Underground Geophysical Observatory: Instrumentation and Observation Results
by Alexey Sobisevich, Yuri Kuzmin, Dmitry Likhodeev, Andrey Kotov, Alexey Desherevsky, Andrey Myasnikov, Valentin Gravirov, Dmitriy Presnov, Konstantin Kanonidi, Irina Puzich, Zalim Dudarov, Spartak Dolov, Irina Suvorova, Alexey Sentsov and George Balashov
Geosciences 2025, 15(2), 42; https://doi.org/10.3390/geosciences15020042 - 27 Jan 2025
Viewed by 1057
Abstract
A full-scale geophysical observatory in the North Caucasus, which was established to study volcanic activity in the Elbrus area, has been functioning for more than 10 years. Results of experimental studies performed at the observatory, located in the deep tunnel, are presented. Special [...] Read more.
A full-scale geophysical observatory in the North Caucasus, which was established to study volcanic activity in the Elbrus area, has been functioning for more than 10 years. Results of experimental studies performed at the observatory, located in the deep tunnel, are presented. Special attention is paid to the stability of metrologically significant parameters of precise information-measuring systems, taking into account different nature noises. Technical characteristics of installed geophysical instruments are given, and the principles of their operation are described. Examples of instrumental observations are also presented; for example, tidal deformations reflecting structural features of the geological environment in the area of the Elbrus volcanic edifice and associated with the presence of magmatic structures were investigated. It was shown that diurnal and semidiurnal harmonics observed in the microvariations of temperature can be caused, among other things, by the influence of tidal effects on the convective component of heat–mass transfer. Full article
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