An investigation has been made to study the cosmic-ray decreases occurring during 2006 with respect to the arrival times of interplanetary shocks and magnetic clouds. We have identified three interplanetary magnetic cloud events during 5 February 2006, 13 April 2006 and 14 April 2006. The interplanetary magnetic field (B), north-south component of interplanetary magnetic field (Bz), solar wind velocity, sunspot number (R) and disturbance storm time index (Dst) associated with these events has been studied in the present work. Data (neutron monitor count rate) from Newark Neutron Monitor 9NM64 has been used. The north-south component of IMF (Bz) produce large geomagnetic disturbance on the onset of interplanetary magnetic clouds. The deviations in the interplanetary and solar wind plasma parameters are significantly correlated to the magnetic cloud events. The increase in Dst index, sunspot number (R) and Bz after the magnetic cloud event produces increase in cosmic ray intensity.
Inhaltsverzeichnis (Table of Contents)
- Introduction
- Interplanetary Magnetic clouds
- Nature of Magnetic clouds
- Size of the Magnetic clouds
- Type of Magnetic clouds
- Clouds preceded by shock (SAC)
- Clouds followed by stream interface (SI)
- Clouds associated with cold magnetic enhancement (CME)
- Influence of magnetic clouds on comic ray intensity
- Magnetic clouds preceded by shock and cosmic ray intensity variations
Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)
This research aims to analyze the impact of interplanetary magnetic clouds on cosmic ray intensity variations during the year 2006. It explores the relationship between the arrival times of interplanetary disturbances, such as shocks and magnetic clouds, and the observed decreases in cosmic ray intensity. The study utilizes data from the Newark Neutron Monitor and various solar wind parameters to investigate the correlation between these phenomena.
- Interplanetary Magnetic Clouds (ICs) and their characteristics
- Impact of ICs on cosmic ray intensity variations
- Correlation between ICs and geomagnetic disturbances
- Analysis of solar wind parameters associated with ICs
- Investigation of Forbush decreases associated with ICs
Zusammenfassung der Kapitel (Chapter Summaries)
- Introduction: This chapter introduces the concept of interplanetary magnetic clouds (ICs), their discovery, and their importance in understanding solar-terrestrial relationships. It discusses the characteristics of ICs, their formation mechanisms, and their influence on the Earth's magnetosphere.
- Interplanetary Magnetic clouds: This section delves deeper into the properties and dynamics of magnetic clouds, including their force-free configurations, magnetic field geometry, and expansion behavior. It also explores the classification of ICs based on their association with shocks, stream interfaces, and cold magnetic enhancements.
- Influence of magnetic clouds on comic ray intensity: This section examines the impact of ICs on cosmic ray intensity, focusing on the observed decreases in cosmic ray intensity associated with ICs preceded by shock waves. It discusses the mechanisms responsible for these variations, such as the magnetic field fluctuations and the expansion of ICs.
Schlüsselwörter (Keywords)
This research focuses on interplanetary magnetic clouds, cosmic ray intensity variations, Forbush decreases, interplanetary shocks, solar wind parameters, geomagnetic disturbances, and the Newark Neutron Monitor.
- Quote paper
- Rajesh Kumar Mishra (Author), Rekha Agarwal (Author), 2024, Cosmic Ray Intensity Variation During the Passage of Interplanetary Disturbances, Munich, GRIN Verlag, https://www.grin.com/document/1443130