Results 81 to 90 of about 1,156 (218)

Forbush decreases and turbulence levels at coronal mass ejection fronts

, 2008
Aims: We seek to estimate the average level of MHD turbulence near coronal mass ejection (CME) fronts as they propagate from the Sun to the Earth. Methods.
S. K. Gupta, S. Kawakami, P. K. Mohanty, Sivaprasad, K., Antia, H. M., P. Subramanian, Hayashi, Y., H. Tanaka, S. R. Dugad, Ito, N., Tonwar, S. C., Nayak, P. K., K. Sivaprasad, H. Kojima, Kawakami, S., Y. Hayashi, Oshima, A., U. D. Goswami, Subramanian, P., T. Nonaka, Dugad, S. R., Gupta, S. K., Nonaka, T., H. M. Antia, N. Ito, Tanaka, H., P. K. Nayak, Kojima, H., Mohanty, P. K., A. Oshima, Goswami, U. D.   +30 more
core   +1 more source

The first Forbush decrease of solar cycle 24

, 2013
The first significant Forbush decrease of solar cycle 24 was recorded in February 18, 2011 from neutron monitors around the world. This was the result of the coronal mass ejections (CMEs) that was released from the Sun on 14 and 15 February 2011 ...
Abunina, M., Belov, A., Yanke, V., Mavromichalaki, H., Eroshenko, E., Papaioannou, A., Asvestari, E., Abunin, A.   +7 more
core  

Measurement of muon flux variations with scintillators in Mexico City and their correlation to solar activity [PDF]

EPJ Web of Conferences
In this work we report the variations of the atmospheric muons flux in Mexico City. The measurements were performed from September to December 2023 at the Institute of Nuclear Sciences of UNAM, located at coordinates 19.32°N 99.18°W with an altitude of ...
Montiel Diego Martínez, Serkin Leonid, Paic Guy, Patiño Salazar Miguel Enrique, Guerra Pulido Jaime Octavio, Vázquez Villamar Carlos Rafael   +5 more
doaj   +1 more source

MHD waves at the pre-front of interplanetary shocks on September 6 and 7, 2017

Solar-Terrestrial Physics
We analyze strong space weather disturbances during first ten days of September 2017, using the geomagnetic Dst index, parameters of normals to interplanetary shock fronts, direct measurements of interplanetary magnetic field, solar wind, and cosmic ray ...
Starodubtsev S. A., Shadrina L. P.
doaj   +1 more source

A new method of measuring Forbush decreases [PDF]

Astronomy & Astrophysics
Context. Forbush decreases (FDs) are short-term depressions in the galactic cosmic ray (GCR) flux and one of the common signatures of coronal mass ejections (CMEs) in the heliosphere. They often show a two-step profile, the second one associated with the CME’s magnetic structure. This second step can be described by the recently developed analytical FD
M. Dumbović, L. Kramarić, I. Benko, B. Heber, B. Vršnak   +4 more
openaire   +3 more sources

Forbush-decreases in 19th solar cycle

Journal of Physics: Conference Series, 2013
The 19th solar cycle was characterized by abnormally high solar activity; unfortunately, the possibilities of observing it were limited. Ground-based observations of cosmic rays and geomagnetic activity are among the few types of continuous measurements that allow statements about the events of 19th cycle and their comparison with events of other ...
A Abunin, M Abunina, A Belov, E Eroshenko, V Oleneva, V Yanke   +5 more
openaire   +1 more source

On recurrent Forbush Decreases [PDF]

Journal of Physics: Conference Series, 2019
A Melkumyan, A Belov, M Abunina, A Abunin, E Eroshenko, V Oleneva, V Yanke   +6 more
openaire   +1 more source

Quantifying Forbush Decrease with a Numerical Model Evaluation [PDF]

<p>Since its launch, the Alpha Magnetic Spectrometer-02 (AMS-02) has emerged as a cornerstone for precise cosmic-ray (CR) spectra measurements, fostering diverse scientific advancements.
Giovanni, Cavallotto, Della torre, Stefano, La vacca, Giuseppe, Gervasi, Massimo   +3 more
core   +1 more source

Magnetopause Location and Solar Wind Turbulence Level During FDs and Their Impacts on the Global Electric Circuit

Space Weather
During Forbush decreases (FDs), the fluxes of high‐energy galactic cosmic rays (GCRs) are suppressed. As a consequence, the ionization profile of the atmosphere is affected and the global electric circuit system is perturbed.
G. Li, S. Fu, X. C. Guo, J. Tacza, T. Chen, J. W. Yue   +5 more
doaj   +1 more source

Real-Time Detection of the Ground Level Enhancement 74 (GLE74) Event on 11 May 2024 by the A.Ne.Mo.S. GLE Alert++ System

Universe
During a period of intense solar activity and highly disturbed geomagnetic conditions, a large Forbush decrease began on 10 May 2024 accompanied by a historic geomagnetic storm that lasted for four days. This extreme geomagnetic disturbance classified as
Maria Gerontidou, Norma B. Crosby, Helen Mavromichalaki, Maria-Christina Papailiou, Pavlos Paschalis, Mark Dierckxsens   +5 more
doaj   +1 more source