Results 71 to 80 of about 13,580,312 (206)

Effects of Forbush Decreases on the Global Electric Circuit

Space Weather
AbstractThe suppression of high‐energy cosmic rays, known as Forbush decreases (FDs), represents a promising factor in influencing the global electric circuit (GEC) system. Researchers have delved into these effects by examining variations, often disruptive, of the potential gradient (PG) in ground‐based measurements taken in fair weather regions.
J. Tacza, G. Li, J.‐P. Raulin
openaire   +2 more sources

Measurements of Forbush Decrease Events at the Center of the South Atlantic Magnetic Anomaly With Muon Detectors

Space Weather, Volume 23, Issue 10, October 2025.
Abstract We present the construction and validation of a low‐cost muon detector in Paraguay, located at the center of the South Atlantic Magnetic Anomaly (SAMA), where the geomagnetic cutoff rigidity R $R$ is 9.63 GV. The detector consists of plastic scintillator plates coupled with silicon photomultipliers for light detection.
Jorge Molina, Euan Richard, Giovanni Secchia, Diego Stalder, Matias Bertoli, Caleb Trepowski, Oscar Baez, Carlos Benitez Montiel, Lucas Cho, Esteban Cristaldo, Pio Barrios, Jesus Nunez, Alan Cuevas   +12 more
wiley   +1 more source

Ground-based Observations of Temporal Variation of the Cosmic-Ray Spectrum during Forbush Decreases

The Astrophysical Journal Letters
Observations of temporary Forbush decreases (FDs) in the Galactic cosmic-ray (GCR) flux due to the passage of solar storms are useful for space-weather studies and alerts.
W. Mitthumsiri, D. Ruffolo, K. Munakata, M. Kozai, Y. Hayashi, C. Kato, P. Muangha, A. Sáiz, P. Evenson, P.-S. Mangeard, J. Clem, S. Seunarine, W. Nuntiyakul, N. Miyashita, R. Kataoka, A. Kadokura, S. Miyake, K. Iwai, H. Menjo, E. Echer, A. Dal Lago, M. Rockenbach, N. J. Schuch, J. V. Bageston, C. R. Braga, H. K. Al Jassar, M. M. Sharma, N. Burahmah, F. Zaman, M. L. Duldig, I. Sabbah, T. Kuwabara   +31 more
doaj   +1 more source

The theoretical and experimental investigation of cosmic ray Forbush-effects [PDF]

The theoretical results of analysis of the expected spatial distributions of density, gradients and anisotropy of cosmic rays, obtained on the basis of the numerical solution of anisotropic diffusion equation in the presence of the disturbances of shock ...
Alania, M. V., Bakradze, T. S., Bochikashvili, D. P., Borchorishvili, T., Despotashvili, M. A., Nachkebia, N. A.   +5 more
core   +1 more source

Effect of Finite Larmor Radius on the Cosmic Ray Penetration into an Interplanetary Magnetic Flux Rope

, 2010
We discuss a mechanism for cosmic ray penetration into an interplanetary magnetic flux rope, particularly the effect of the finite Larmor radius and magnetic field irregularities.
Cane, Cane, Giacalone, Hironori Shimazu, Krittinatham, le Roux, Mace, Marubashi, Michałek, Minnie, Munakata, Munakata, Qin, Qin, Qin, Sanderson, Shimazu, Yûki Kubo, Zimbardo   +18 more
core   +1 more source

Characterization of Regional Space Weather Conditions in Mexico During Solar Minimum 24/25: Baseline for Severity Scale Development

Space Weather, Volume 23, Issue 10, October 2025.
Abstract Using observations from the National Space Weather Laboratory's (LANCE acronym in Spanish) ground‐based network, we characterize regional space weather conditions in Mexico during the solar minimum 24/25 (2018–2020). Data analyzed include regional geomagnetic indices (the regional K index, Kmex, and Δ ${\Delta }$H), ionospheric Total Electron ...
J. A. Gonzalez‐Esparza, E. Sanchez‐Garcia, M. Sergeeva, P. Corona‐Romero, V. J. Gatica‐Acevedo, C. I. Castellanos, L. X. Gonzalez‐Mendez   +6 more
wiley   +1 more source

The effect of gradient and curvature drift on cosmic-ray Forbush decreases

The Astrophysical Journal, 1986
When Forbush decreases are analyzed separately in the periods 1959-1969 and 1971-1980, it is found that during the former period there typically is a slower reset than in the latter. This is in agreement with what one would expect from drift motions of charged particles in the interplanetary magnetic field during these two periods.
M. S. Mulder, H. Moraal
openaire   +1 more source

Spatiotemporal Evolution of the 2022 March Interplanetary Coronal Mass Ejection Revealed by Multipoint Observations of Forbush Decreases

The Astrophysical Journal
Interplanetary coronal mass ejections (ICMEs) cause “Forbush decreases” (FDs), which are local decreases in background galactic cosmic rays (GCRs).
Gaku Kinoshita, Beatriz Sanchez-Cano, Yoshizumi Miyoshi, Laura Rodríguez-García, Emilia Kilpua, Benoit Lavraud, Mathias Rojo, Marco Pinto, Yuki Harada, Go Murakami, Yoshifumi Saito, Shoichiro Yokota, Daniel Heyner, David Fischer, Nicolas Andre, Kazuo Yoshioka   +15 more
doaj   +1 more source

Magnetosphere-Ground Responses and Energy Spectra Analysis of Solar Proton Event on 28 October 2021

Remote Sensing
Among the coronal mass ejections (CMEs) and solar proton events (SPEs) frequently observed by near-Earth spacecraft, the SPE that occurred on 28 October 2021 stands out as a remarkable research event.
Fang Zhang, Zhenxia Zhang, Dali Zhang, Xinqiao Li, Zhiqiang Ding, Lu Wang, Shujie Li, Zhenghua An, Jilong Zhang   +8 more
doaj   +1 more source

Drift and Forbush decreases [PDF]

Evidence is presented that the drift effect on the modulation of galactic cosmic rays can be seen on Forbush decreases observed by the Deep River and Hermanus neutron ...
Moraal, H., Mulder, M. S.
core   +1 more source