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Geosciences, Volume 15, Issue 6

June 2025 - 45 articles

Cover Story: This study stems from inquiries into rapid geomagnetic reversals and concludes that differential rotation exists within Earth, driven by lunar tidal forces. We propose a conceptual model where the oceanic tidal bulge acts as a brake, initially slowing the crust and mantle. The outer core, being fluid, delays this effect, resulting in differential rotation at layer boundaries. Approximately 66,000 years after the Moon’s formation, tidal forces slowed crust-mantle rotation by ~5.5°/yr relative to the core. Estimated frictional heating reaches 0.3478 TW, potentially raising outer core temperatures by ~13.4 K per billion years. Continuous differential rotation may generate turbulence and electromagnetic activity, potentially linked to geomagnetic reversals. View this paper
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Articles (45)

  • Article
  • Open Access
1,028 Views
36 Pages

High-enthalpy geothermal resources in volcanic settings often lack clear surface manifestations, requiring integrated, data-driven approaches to identify hidden reservoirs. In this study, we apply a multivariate clustering technique—genetic K-M...

  • Article
  • Open Access
1 Citations
779 Views
17 Pages

A complex study was performed of the disturbances in geophysics parameters that were observed during a short-term period of earthquake preparation. On 4 March 2024, an M6.1 earthquake (N 42.93, E 76.966) occurred with the epicenter 12.2 km apart from...

  • Article
  • Open Access
805 Views
20 Pages

This study investigates the challenges and opportunities associated with improving the vertical resolution of normal and lateral resistivity logs in thin-bedded rock formations. The proposed iterative inversion procedure combines a finite element met...

  • Review
  • Open Access
1 Citations
1,138 Views
30 Pages

Snow avalanches occur in snow-covered highland mountains and represent one of the most significant natural hazards pertaining to the field of geoscience. Although some insight into the formation of avalanches has been provided, a comprehensive overvi...

  • Article
  • Open Access
2 Citations
983 Views
19 Pages

Homrit Akarem Post-Collisional Intrusion, Southeastern Desert, Egypt: Petrogenesis of Greisen Formed in a Cupola Structure and Enrichment in Strategic Minerals

  • Mokhles K. Azer,
  • Adel A. Surour,
  • Hilmy E. Moussa,
  • Ayman E. Maurice,
  • Mabrouk Sami,
  • Moustafa A. Abou El Maaty,
  • Adel I. M. Akarish,
  • Mohamed Th. S. Heikal,
  • Ahmed A. Elnazer and
  • Mustafa A. Elsagheer
  • + 4 authors

The greisens discussed in the present study are associated with the Homrit Akarem post-collisional granites, which are exposed near the western edge of the Egyptian Nubian Shield in the Southeastern Desert of Egypt. The Homrit Akarem granites intrude...

  • Article
  • Open Access
1 Citations
964 Views
20 Pages

The integration of new technologies across scientific disciplines, including rock slope engineering, is increasingly essential. The use of drones and advanced software tools for mapping and analyzing large rocky slopes in detail has become indispensa...

  • Article
  • Open Access
839 Views
12 Pages

Twenty-Five Years After the Chi-Chi Earthquake in the Light of Natural Time Analysis

  • Panayiotis A. Varotsos,
  • Nicholas V. Sarlis,
  • Efthimios S. Skordas,
  • Qinghua Huang,
  • Jann-Yenq Liu,
  • Masashi Kamogawa and
  • Toshiyasu Nagao

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 analy...

  • Article
  • Open Access
1 Citations
1,271 Views
20 Pages

Impact of Climate Conditions on the Sensitivity of Long-Term Annual River Flow in a Cascade-Dammed River System: The Brda River Case Study (Poland)

  • Dawid Szatten,
  • Edward Zbigniew Łaszyca,
  • Alberto Bosino,
  • Mattia De Amicis and
  • Oleksandr Obodovskyi

Maintaining the sustainable quantity and quality of water resources is crucial for fluvial systems, as well as for human life. This study describes the long-term annual river flow within the Brda River catchment of Poland, a fluvial system subjected...

  • Article
  • Open Access
1,188 Views
11 Pages

The Mineralogy Manuscript Preserved in the Archivo General de Palacio, (Madrid, Spain): A Case Study

  • María Rosario Alcalde-Fuentes,
  • Rosario García Giménez,
  • Ramón Jiménez-Martínez and
  • Juan Alberto Pérez-Valera

The manuscript of the Mineralogical lessons for the 1824–1825 course being held at the Royal Cabinet of Natural History had been found in the Archivo General de Palacio (AGP; Madrid, Spain) by the priest Donato García, who replaced Chris...

  • Article
  • Open Access
1 Citations
858 Views
17 Pages

This paper uses an orthogonal resistor network model instead of traditional finite-difference or finite-element methods to explore an alternative approach to forward modeling in Electrical Resistivity Tomography (ERT). A resistor network is advantage...

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Geosciences - ISSN 2076-3263