NDLI: Transient perturbations and their effects in the heliosphere, the geo-magnetosphere, and the Earth’s atmosphere: Space weather perspective

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Spectroscopic studies of solar corona VI: Trend in line-width variation of coronal emission lines with height independent of the structure of coronal loops

Physics of the sun’s hot atmosphere

Magnetic source regions of coronal mass ejections

North-south distribution of solar flares during cycle 23

Initiation of cmes by magnetic flux emergence

Flare ribbon expansion and energy release

Solar x-ray spectrometer (SOXS) mission – Low energy payload – First results

EUV and coronagraphic observations of coronal mass ejections

Enigmatic solar wind disappearance events – Do we understand them?

Transient perturbations and their effects in the heliosphere, the geo-magnetosphere, and the Earth’s atmosphere: Space weather perspective

Space weather effects of coronal mass ejection

Geo-effectiveness of solar wind extremes

The challenge of predicting the occurrence of intense storms

Coronal mass ejections of solar cycle 23

Photospheric, chromospheric and helioseismic signatures of a large flare in super-active region NOAA 10486

Extremely energetic 4B/X17.2 flare and associated phenomena

The flares associated with the dynamics of the sunspots

Design and status of Solar Vector Magnetograph (SVM-I) at Udaipur solar observatory

Research facilities for solar astronomy at ARIES

Data acquisition, control, communication and computation system of solar X-ray spectrometer (SOXS) mission

Observational study of solar magnetic active phenomena

Development of solar scintillometer

Spatial damping of linear compressional magnetoacoustic waves in quiescent prominences

Observational searches for chromospheric G-mode oscillations from CaII H-line observations

The extreme solar activity during october–november 2003

Study of microflares through soxs mission

Study of a large helical eruptive prominence associated with double CME on 21 April 2001

Magnetosonic waveguide model of solar wind flow tubes

Analysis of plasma and field conditions during some intensely geo-effective transient solar/interplanetary disturbances of solar cycle 23

The influence of solar activity on the rainfall over India: Cycle-to-cycle variations

Journal of Astrophysics and Astronomy : Volume 27, Issue 1, March 2006

Journal of Astrophysics and Astronomy : Volume 26

Journal of Astrophysics and Astronomy : Volume 25

Journal of Astrophysics and Astronomy : Volume 24

Journal of Astrophysics and Astronomy : Volume 23

Journal of Astrophysics and Astronomy : Volume 22

Journal of Astrophysics and Astronomy : Volume 21

Journal of Astrophysics and Astronomy : Volume 20

Journal of Astrophysics and Astronomy : Volume 19

Journal of Astrophysics and Astronomy : Volume 18

Transient perturbations and their effects in the heliosphere, the geo-magnetosphere, and the Earth’s atmosphere: Space weather perspective

Content Provider	Springer Nature Link
Copyright Year	2006
Abstract	We discuss the effects of certain dynamic features of space environment in the heliosphere, the geo-magnetosphere, and the earth’s atmosphere. In particular, transient perturbations in solar wind plasma, interplanetary magnetic field, and energetic charged particle (cosmic ray) fluxes near 1 AU in the heliosphere have been discussed. Transient variations in magnetic activity in geo-magnetosphere and solar modulation effects in the heliosphere have also been studied. Emphasis is on certain features of transient perturbations related to space weather effects. Relationships between geomagnetic storms and transient modulations in cosmic ray intensity (Forbush decreases), especially those caused by shock-associated interplanetary disturbances, have been studied in detail. We have analysed the cosmic ray, geomagnetic and interplanetary plasma/field data to understand the physical mechanisms of two phenomena namely, Forbush decrease and geomagnetic storms, and to search for precursors to Forbush decrease (and geomagnetic storms) that can be used as a signature to forecast space weather. It is shown that the use of cosmic ray records has practical application for space weather predictions. Enhanced diurnal anisotropy and intensity deficit of cosmic rays have been identified as precursors to Forbush decreases in cosmic ray intensity. It is found that precursor to smaller (less than 5%) amplitude Forbush decrease due to weaker interplanetary shock is enhanced diurnal anisotropy. However, larger amplitude (greater than 5%) Forbush decrease due to stronger interplanetary shock shows loss cone type intensity deficit as precursor in ground based intensity record. These precursors can be used as inputs for space weather forecast.
Starting Page	209
Ending Page	217
Page Count	9
File Format	PDF
ISSN	02506335
Journal	Journal of Astrophysics and Astronomy
Volume Number	27
Issue Number	2-3
e-ISSN	09737758
Language	English
Publisher	Springer India
Publisher Date	2006-01-01
Publisher Institution	Indian Academy of Sciences
Publisher Place	New Delhi
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Space weather geomagnetic storm cosmic ray Forbush decrease interplanetary shock coronal mass ejection Astronomy Astrophysics
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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PRECURSORS OF THE FORBUSH DECREASE ON 2006 DECEMBER 14 OBSERVED WITH THE GLOBAL MUON DETECTOR NETWORK (GMDN)

Forbush decreases at a middle latitude neutron monitor: relations to geomagnetic activity and to interplanetary plasma structures

P.l.verma et al,halo coronal mass ejectios the cause ….. Proceeding of the 31st icrc,lodz2009 halo coronal mass ejections: the cause of large forbush decreases.

Directional muon telescopes not useful for estimating the magnitudes of Forbush decreases and geomagnetic storms

Strong solar flares, weak geo-effectiveness

Space weather application of forbush decrease events.

Characteristic features of ICMEs associated with big storms in geomagnetic activity and large Forbush decreases in cosmic ray intensity

Interplanetary Coronal Mass Ejections, Associated Features, and Transient Modulation of Galactic Cosmic Rays

1 effects of interplanetary coronal mass ejections on cosmic ray intensity and on geomagnetic field.

Transient perturbations and their effects in the heliosphere, the geo-magnetosphere, and the Earth’s atmosphere: Space weather perspective

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PRECURSORS OF THE FORBUSH DECREASE ON 2006 DECEMBER 14 OBSERVED WITH THE GLOBAL MUON DETECTOR NETWORK (GMDN)

Forbush decreases at a middle latitude neutron monitor: relations to geomagnetic activity and to interplanetary plasma structures

P.l.verma et al,halo coronal mass ejectios the cause ….. Proceeding of the 31st icrc,lodz2009 halo coronal mass ejections: the cause of large forbush decreases.

Directional muon telescopes not useful for estimating the magnitudes of Forbush decreases and geomagnetic storms

Strong solar flares, weak geo-effectiveness

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Characteristic features of ICMEs associated with big storms in geomagnetic activity and large Forbush decreases in cosmic ray intensity

Interplanetary Coronal Mass Ejections, Associated Features, and Transient Modulation of Galactic Cosmic Rays

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Transient perturbations and their effects in the heliosphere, the geo-magnetosphere, and the Earth’s atmosphere: Space weather perspective