Results 71 to 80 of about 13,189 (224)

Was the GLE on May 17, 2012 linked with the M5.1-class flare the first in the 24th solar cycle? [PDF]

, 2013
On May 17, 2012 an M5.1-class flare exploded from the sun. An O-type coronal mass ejection (CME) was also associated with this flare. There was an instant increase in proton flux with peak at $\geq 100$ MeV, leading to S2 solar radiation storm level.
A. C. Fauth, A. C. S. Felicio, A. C. S. Pinto, B. Pimentel, C. E. Navia, C. R. A. Augusto, F. Freire, Gleb Wataghin, J. Vianna, M. Paulista, T. Sinzi, V. Kopenkin   +11 more
core  

Relativistic microburst storm characteristics: Combined satellite and ground-based observations [PDF]

, 2010
We report a comparison of Solar Anomalous Magnetospheric Particle Explorer detected relativistic electron microbursts and short-lived subionospheric VLF perturbations termed FAST events, observed at Sodankyl Geophysical Observatory, Finland, during 2005.
Bortnik, Jacob, Clilverd, Mark A., Dietrich, Sarah, Raita, Tero, Rodger, Craig J.   +4 more
core   +1 more source

Dawn‐Side Anomaly in Sudden Geomagnetic Field Responses to Solar Wind Pressure Discontinuities During the 10 May and 10 October 2024 Geomagnetic Storms

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Interactions of solar wind dynamic pressure (SWDP) discontinuities with Earth's magnetosphere cause geomagnetic Sudden Commencements (SCs). Typically, positive/negative SCs occur at low latitudes due to enhancements/reductions in SWDP.
Deeksha Rai, S. Tulasi Ram, B. Nilam, D. M. Oliveira, B. Remya, Anil Raghav, D. Chakrabarty, Abhishek Kumar, Shivam Parashar, Vipin K. Yadav, A. P. Dimri   +10 more
wiley   +1 more source

HIGH-SPEED SOLAR WIND AND GEOMAGNETIC ACTIVITY

Radio Physics and Radio Astronomy, 2015
The impact of high-speed solar wind disturbances on the occurrence of geomagnetic storms is analyzed. The solar wind velocity values, determined from scintillation observations at the UTR-2 and URAN-2 Ukrainian decameter radio telescopes are analyzed ...
M. R. Olyak
doaj   +1 more source

Diurnal variations of cosmic ray geomagnetic cut-off threshold rigidities [PDF]

The spectrographic global survey method was used to investigate the rigidity variations Rc of geomagnetic cut-off as a function of local time and the level of geomagnetic disturbance for a number of stations of the world wide network.
Danilova, O. A., Dvornikov, V. M., Sdobnov, V. E., Sergeev, A. V., Tyasto, M. I.   +4 more
core   +1 more source

Effects of the May 2024 Solar Storm on the Earth's Radiation Belts Observed by CALET on the International Space Station

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract In May 2024, extraordinary solar activity triggered a powerful solar storm, impacting Earth and producing the extreme geomagnetic storm of 10‐11 May, the most intense since 2003. This had significant effects on the magnetosphere, leading to the creation of a new long‐lasting component of relativistic electrons and to flux changes in the South ...
A. Ficklin, A. Bruno, L. Blum, N. Cannady, T. G. Guzik, R. Kataoka, K. Munakata, Y. Akaike, S. Torii   +8 more
wiley   +1 more source

Geomagnetic Navigation of Autonomous Underwater Vehicle Based on Multi-objective Evolutionary Algorithm

Frontiers in Neurorobotics, 2017
This paper presents a multi-objective evolutionary algorithm of bio-inspired geomagnetic navigation for Autonomous Underwater Vehicle (AUV). Inspired by the biological navigation behavior, the solution was proposed without using a priori information ...
Hong Li, Mingyong Liu, Feihu Zhang
doaj   +1 more source

Role of the Diurnal Tide in Driving the Westward Phase of the Mesospheric Semiannual Oscillation Around March Equinox

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract The mesospheric semiannual oscillation (MSAO) in tropical zonal‐mean zonal winds exhibits a strong westward phase around March equinox. It has been thought that the migrating diurnal tide (DW1) plays a role in the initiation of this phase because DW1 peaks around this time and satellite observations have shown it to undergo wave breaking.
Christopher S. Krier, Hanli Liu, Guiping Liu   +2 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  

Real-time Magnetometer Disturbance Estimation via Online Nonlinear Programming

, 2019
Magnetometer is a significant sensor for integrated navigation. However, it suffers from many kinds of unknown dynamic magnetic disturbances. We study the problem of online estimating such disturbances via a nonlinear optimization aided by intermediate ...
Wu, Jin
core   +1 more source