Results 51 to 60 of about 13,690 (192)

Halo Coronal Mass Ejections during Solar Cycle 24: reconstruction of the global scenario and geoeffectiveness [PDF]

open access: yes, 2017
In this study we present a statistical analysis of 53 fast Earth-directed halo CMEs observed by the SOHO/LASCO instrument during the period Jan. 2009-Sep.
Messerotti, Mauro   +3 more
core   +4 more sources

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

open access: yesNatural 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  

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

open access: yesAdvances 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

Spectrum analysis of short-period K index behaviour at high and mid-latitudes [PDF]

open access: yesAnnales Geophysicae, 2015
Geomagnetic activity levels during the declining phase and solar minimum period of the solar cycle are considerably different from those during the solar maximum phase.
P. B. Kotzé
doaj   +1 more source

Heliospheric Magnetic Field 1835-2009 [PDF]

open access: yes, 2010
We use recently acquired geomagnetic archival data to extend our long-term reconstruction of the HMF strength. The 1835-2009 HMF series is based on an updated and substantiated IDV series from 1872-onwards and on Bartels' extension, by proxy, of his u ...
Andreasen   +35 more
core   +1 more source

System Integration and Field Testing of Low‐Cost Autonomous Platooning Platforms: Collision Avoidance Scenario

open access: yesJournal of Field Robotics, Volume 43, Issue 2, Page 847-878, March 2026.
ABSTRACT This paper presents the development and validation of a scalable platooning system based on the predecessor‐following (PF) topology, designed for low‐cost follower platforms. It integrates key technologies such as localization, path planning, profile generation, and low‐level control to create a practical solution.
Dongwoo Seo, Jinhee Lee, Jaeyoung Kang
wiley   +1 more source

New K-Indices from South Atlantic Observatories : Port Stanley and Ascension Island [PDF]

open access: yes, 2010
Port Stanley and Ascension Island magnetic observatories have been in continuous operation since the early 1990's. These remote South Atlantic locations provide much needed coverage in the global network of geomagnetic observatories and help to monitor ...
Clarke, Ellen   +2 more
core  

How Does the Magnetosphere‐Ionosphere Current System Respond to Solar Flares?

open access: yesGeophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract While the isolated effects of solar flares on low‐latitude ionospheric electrodynamics have been well documented, the coupled system response of the equatorial electrojet (EEJ), auroral electrojet (AEJ), field‐aligned currents (FACs), and asymmetric ring current (ASY‐H) remains poorly understood.
Hongkai Tang   +5 more
wiley   +1 more source

Morning–Afternoon Asymmetry in Correlations Between the Equatorial Electrojet and Sq Westward Currents on Polar‐Side of the Focus

open access: yesGeophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Equatorial electrojet (EEJ) and solar quiet (Sq) currents with one vortex each in either hemisphere are key components of the ionospheric dynamo currents, driving geomagnetic diurnal variations observed at Earth's surface. However, the physical coupling between EEJ and Sq westward currents on the polar side of the vortex focus remains poorly ...
Xiaocan Liu   +3 more
wiley   +1 more source

The significance of adopting the Islamic calendar in Islamic housing finance. Case study : Bank Muamalat Malaysia Berhad Parit Raja Branch [PDF]

open access: yes, 2016
Malaysia is considered to be one of the most advance developed Muslim countries among Muslim countries that employ Islamic Banking system. In this context, Islamic Housing Finance has grown rapidly and becomes popular as a common solution for Muslims who
Dwidayati, Kunthi Herma
core   +1 more source

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