Results 31 to 40 of about 13,437 (258)

Deep Electron Density Depletion Near Sunset Terminator on St. Patrick's Day Storm and Its Impacts on Skywave Propagation

Space Weather, 2023
The plasma density distribution in the equatorial and low latitude ionosphere can often be severely disturbed during active space weather events that can have paramount impacts on the long‐distance high frequency (HF) radio wave (Skywave) communications ...
M. Ankita, S. Tulasi Ram, K. K. Ajith, S. Sripathi   +3 more
doaj   +1 more source

Co-estimating geomagnetic field and calibration parameters: modeling Earth’s magnetic field with platform magnetometer data

Earth, Planets and Space, 2021
Models of the geomagnetic field rely on magnetic data of high spatial and temporal resolution to give an accurate picture of the Earth’s internal magnetic field and its time-dependence.
Clemens Kloss, Christopher C. Finlay, Nils Olsen   +2 more
doaj   +1 more source

Coupled spin models for magnetic variation of planets and stars

, 2011
Geomagnetism is characterized by intermittent polarity reversals and rapid fluctuations. We have recently proposed a coupled macro-spin model to describe these dynamics based on the idea that the whole dynamo mechanism is described by the coherent ...
A. Ferriz-Mas, A. Nakamichi, Acebron, Antoni, Campa, Christensen, D. Schmitt, Dias, Franchiotti, Gilbert, H. Mouri, Inglis, Ishikawa, J. Wicht, Kageyama, Kageyama, Kida, Kono, Korte, Kuramoto, M. Morikawa, Matsuyama, Mazaud, Rikitake, Roberts, Seki, Sota, Stanley, Stevenson, Tsinober   +29 more
core   +1 more source

High-Fidelity Archeointensity Results for the Late Neolithic Period From Central China [PDF]

, 2020
Archeomagnetism focuses on exploring high-resolution variations of the geomagnetic field over hundreds to thousands of years. In this study, we carried out a comprehensive study of chronology, absolute and relative paleointensity on a late Neolithic site
Cai, S, Deng, C, Pan, Y, Qin, H, Tauxe, L, Wang, W, Yang, L   +6 more
core   +1 more source

The Gridded Geomagnetic Field of India with MATLAB GUI

Data Science Journal
A unique two-dimensional gridded geomagnetic map of India is constructed using the geomagnetic field observations from 11 observatories of India, operated by the Indian Institute of Geomagnetism. In order to create the spatial grid, 11 spatial techniques
Jayashree Bulusu, Rohit Kumar Jha, Amrita Yadav, S. P. Anand, Gopi K. Seemala, Prasant K. Tiwari, A. P. Dimri   +6 more
doaj   +1 more source

Evaluation of groundwater potential and saline water intrusion using secondary geophysical parameters: A case study from western Maharashtra, India

E3S Web of Conferences, 2018
Aquifers along the coastal regions around the world are facing severe level of saline water intrusion problems. Rapid development and the associated increase in groundwater withdrawals intensify the problem.
Suneetha N., Gupta Gautam
doaj   +1 more source

Observation of ionospheric Alfven resonator with double spectral resonance structures at low latitude station, Shillong ( $$dipole L=1.08$$ d i p o l e L = 1.08 )

Earth, Planets and Space, 2022
Spectral Resonance Structures (SRS) of Ionospheric Alfven Resonator (IAR) are investigated by analysing the magnetic field data of a high sampling frequency induction coil magnetometer, installed at a low latitude Indian station, Shillong $$(25.56^\circ ...
P. Adhitya, Masahito Nosé, Jayashree Bulusu, Geeta Vichare, A. K. Sinha   +4 more
doaj   +1 more source

Kinematic dynamo action in a sphere. II. Symmetry selection [PDF]

, 2000
The magnetic fields of the planets are generated by dynamo action in their electrically conducting interiors. The Earth possesses an axial dipole magnetic field but other planets have other configurations: Uranus has an equatorial dipole for example.
Barber, C.N., Gibbons, S., Gubbins, D., Love, J.J.   +3 more
core   +1 more source

A 100‐year Geoelectric Hazard Analysis for the U.S. High‐Voltage Power Grid

Space Weather, 2020
A once‐per‐century geoelectric hazard map is created for the U.S. high‐voltage power grid. A statistical extrapolation from 31 years of magnetic field measurements is made by identifying 84 geomagnetic storms with the Kp and Dst indices.
G. M. Lucas, J. J. Love, A. Kelbert, P. A. Bedrosian, E. J. Rigler   +4 more
doaj   +1 more source

A comparison of ground-based hydroxyl airglow temperatures with SABER/TIMED measurements over 23° N, India [PDF]

Annales Geophysicae, 2017
Ground-based observations of OH (6, 2) Meinel band nightglow were carried out at Ranchi (23.3° N, 85.3° E), India, during January–March 2011, December 2011–May 2012 and December 2012–March 2013 using an all-sky imaging system.
N. Parihar, D. Singh, S. Gurubaran
doaj   +1 more source