Results 51 to 60 of about 13,823 (196)

New Regional Geomagnetic Indices for the Russian Sector of the Geomagnetic Observation Network

Russian Journal of Earth Sciences
It was proposed to introduce new regional geomagnetic indices SME-R and VAR characterizing the values of the geomagnetic field perturbation and its variability (i.e., dB/dt) in the Russian sector at auroral latitudes into space weather studies.
Vorobev Andrey, Pilipenko Vyacheslav, Dobrovolsky Michael, Kozyreva Olga, Evdokimova Marina, Kudin Dmitriy Vladimirovich   +5 more
doaj   +1 more source

First Results of a New Inversion Tool for Thermospheric Neutral Mass Density Computations During Severe Geomagnetic Storms

AGU Advances, Volume 7, Issue 3, June 2026.
Abstract In Low Earth Orbit (LEO), atmospheric drag is the dominant source of trajectory prediction error below approximately 700 km altitude, primarily due to inaccuracies in thermospheric density models. This work presents a method for temporally deconvolving Energy Dissipation Rates (EDRs) to produce single‐satellite density estimates, which can be ...
S. Mutschler, M. Pilinski, E. Zesta, D. M. Oliveira, K. Delano, K. Garcia‐Sage, W. K. Tobiska   +6 more
wiley   +1 more source

A Novel Neural Network‐Based Approach to Derive a Local Geomagnetic Baseline for Future Robust Characterization of Geomagnetic Indices at Mid‐Latitude

Space Weather
Geomagnetic indices derived from ground magnetic measurements characterize the intensity of solar‐terrestrial interaction. Global magnetic indices derived from multiple magnetic observatories at mid‐latitude have commonly been used for space weather ...
Rungployphan Kieokaew, Veronika Haberle, Aurélie Marchaudon, Pierre‐Louis Blelly, Aude Chambodut   +4 more
doaj   +1 more source

Mid‐Latitude Double H‐Spikes: Their Properties and Signatures in Different Geomagnetic Indices

Space Weather, 2023
Proper assessment of geomagnetic disturbances is a key aspect of space weather as technology is often impacted by space weather activity without previous warnings or proper forecasts.
E. Saiz, A. Guerrero, C. Cid
doaj   +1 more source

Nitric Oxide Radiative Relaxation Time: Damping Timescales of Lower Thermospheric Thermal Perturbations

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract Nitric oxide (NO) radiative cooling governs much of the energy budget in the Earth's lower thermosphere and damps out temperature perturbations. The radiative relaxation time (RRT), the timescale that defines how efficiently infrared radiation damps out the perturbations to the thermal structure to 1/e of the perturbation's initial value, is ...
Ningchao Wang, Martin G. Mlynczak, John T. Emmert, Manuel López‐Puertas, Bernd Funke   +4 more
wiley   +1 more source

Connection between ENSO phenomena and solar and geomagnetic activity [PDF]

Natural Hazards and Earth System Sciences, 2002
Connections between El Niño – Southern Oscillation (ENSO) phenomena and indices of solar activity and geomagnetic disturbance were investigated. Spectral analysis of the ENSO-data was carried out.
M. A. Nuzhdina
doaj  

Geoeffectiveness and efficiency of CIR, Sheath and ICME in generation of magnetic storms

, 2011
We investigate relative role of various types of solar wind streams in generation of magnetic storms. On the basis of the OMNI data of interplanetary measurements for the period of 1976-2000 we analyze 798 geomagnetic storms with Dst < -50 nT and their ...
Akasofu, Alves, Alves, Borovsky, Borovsky, Burlaga, Burton, Cane, D'Amicis, Denton, Despirak, Despirak, Dmitriev, Dungey, Echer, Echer, Echer, Fairfield, Gonzalez, Gonzalez, Gonzalez, Guo, Huttunen, Huttunen, Huttunen, I. G. Lodkina, Jian, Khabarova, King, Koskinen, Lepping, Longden, Lopez, M. Y. Yermolaev, Mustajab, N. S. Nikolaeva, Nikolaeva, Nikolaeva, Plotnikov, Pulkkinen, Pulkkinen, Richardson, Rostoker, Russell, Thatcher, Tsurutani, Tsurutani, Turner, Weigel, Xu, Y. I. Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Zhang   +63 more
core   +1 more source

AATR an ionospheric activity indicator specifically based on GNSS measurements [PDF]

, 2018
This work reviews an ionospheric activity indicator useful for identifying disturbed periods affecting the performance of Global Navigation Satellite System (GNSS). This index is based in the Along Arc TEC Rate (AATR) and can be easily computed from dual-
González Casado, Guillermo, Ibáñez Segura, Deimos, Juan Zornoza, José Miguel, Orús Pérez, Raul, Rovira Garcia, Adrià, Sanz Subirana, Jaume   +5 more
core   +2 more sources

Ediacara Obscura: Unveiling Hidden Magnetisations in the Fen Complex, Southern Norway

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract Paleomagnetic directions found in Ediacaran (635–539 Ma) rocks are widely dispersed, which has led to conflicting hypotheses about tectonic regimes and geomagnetic field behavior during this period, and raised doubts about the fidelity of the paleomagnetic record.
Justin A. D. Tonti‐Filippini, Paul Y. J. Antonio, Sven Dahlgren, Rosa de Boer, Leandro Gallo, Petter Silkoset, Bertwin de Groot, Lennart de Groot, Mathew Domeier   +8 more
wiley   +1 more source

Effect of Ap-Index of Geomagnetic Activity on S&P 500 Stock Market Return

Advances in Astronomy, 2019
Geomagnetic activity with global influence is an essential object of space weather research and is a significant link in the section of the solar wind-magnetospheric coupling process.
Lifang Peng, Ning Li, Jingwen Pan
doaj   +1 more source