Space Weather: The Solar Perspective

Schwenn, R.

doi:10.12942/lrsp-2006-2

Cited by 425 publications

(370 citation statements)

References 247 publications

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“…[52] Based on the work in this paper, the next step is to apply the DBIE-NLFFF extrapolation method to the solar eruptive events studies [Low, 1996;Schwenn, 2006;, such as understanding the 3-D coronal magnetic field configurations associated with the X3.4 class flare event of NOAA 10930 on 13 December 2006 . To do the physical analyses for the solar eruptive events, a higher-resolution grid should be used in the NLFFF extrapolation calculations (e.g., 1″/pixel, the same resolution as the XRT images).…”

Section: Discussionmentioning

confidence: 99%

Nonlinear force-free field extrapolation of the coronal magnetic field using the data obtained by the Hinode satellite

Wang

Yan

2011

J. Geophys. Res.

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[1] The Hinode satellite can obtain high-quality photospheric vector magnetograms of solar active regions and the simultaneous coronal loop images in soft X-ray and extreme ultraviolet (EUV) bands. In this paper, we continue the work of and apply the newly developed upward boundary integration computational scheme for the nonlinear force-free field (NLFFF) extrapolation of the coronal magnetic field to the

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Section: Discussionmentioning

confidence: 99%

Nonlinear force-free field extrapolation of the coronal magnetic field using the data obtained by the Hinode satellite

Wang

Yan

2011

J. Geophys. Res.

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“…The largest SEP event attained its peak intensity during shock passage of the Earth on October 29. It is associated with the X17.2 flare and a halo CME about a day earlier (Schwenn 2006b). The maximum proton energy was probably larger than 1 GeV.…”

Section: Solar Energetic Particlesmentioning

confidence: 99%

“…The top right panel illustrates how the geomagnetic activity maximizes during the declining phase of the solar cycle. The bottom right panel shows the semiannual variations obtained by averaging the monthly values in the left hand plots (Schwenn 2006b). …”

Section: Sun and Solar Activitymentioning

confidence: 99%

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Space Weather: Physics, Effects and Predictability

2010

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The time varying conditions in the near-Earth space environment that may affect space-borne or ground-based technological systems and may endanger human health or life are referred to as space weather. Space weather effects arise from the dynamic and highly variable conditions in the geospace environment starting from explosive events on the Sun (solar flares), Coronal Mass Ejections near the Sun in the interplanetary medium, and various energetic effects in the magnetosphere-ionosphere-atmosphere system. As the utilization of space has become part of our everyday lives, and as our lives have become increasingly dependent on technological systems vulnerable to the space weather influences, the understanding and prediction of hazards posed by these active solar events have grown in importance. In this paper, we review the processes of the Sun-Earth interactions, the dynamic conditions within the magnetosphere, and the predictability of space weather effects on radio waves, satellites and ground-based technological systems today.

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“…As the largest scale eruptive phenomenon in the solar atmosphere, it can be observed as observed as enhanced brightness propagating out from coronal-loop-sized scale (10 4 km), expand to cover a significant part of the solar surface which is responsible for the most extreme space weather effects at Earth [46]. Moreover, CMEs may frequently interact with the Earth (and other planets), producing a series of impacts on the terrestrial environment and the human high-tech activities [47,48]. Further observations indicate that CMEs can also be observed in other wavelengths, such as soft X-rays [49,50] , an extreme ultra-violet (EUV, [51,52], radio [53] and so on (H. S. Hudson & Cliver, 2001) .…”

Section: Coronal Mass Ejections (Cmes)mentioning

confidence: 99%

Probability of Solar Flares Turn out to Form a Coronal Mass Ejections Events due to the Characterization of Solar Radio Burst Type II and III

Hamidi

2014

ILCPA

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The solar flare and Coronal Mass Ejections (CMEs) are well known as one of the most massive eruptions which potentially create major disturbances in the interplanetary medium and initiate severe magnetic storms when they collide with the Earth's magnetosphere. However, how far the solar flare can contribute to the formation of the CMEs is still not easy to be understood. These phenomena are associated with II and III burst it also divided by sub-type of burst depending on the physical characteristics and different mechanisms. In this work, we used a Compound Astronomical Low-cost Low-frequency Instrument for Spectroscopy in Transportable Observatories (CALLISTO) system. The aim of the present study is to reveal dynamical properties of solar burst type II and III due to several mechanisms. Most of the cases of both solar radio bursts can be found in the range less that 400 MHz. Based on solar flare monitoring within 24 hours, the CMEs that has the potential to explode will dominantly be a class of M1 solar flare. Overall, the tendencies of SRBT III burst form the solar radio burst type III at 187 MHz to 449 MHz. Based on solar observations, it is evident that the explosive, short time-scale energy release during flares and the long term, gradual energy release expressed by CMEs can be reasonably understood only if both processes are taken as common and probably not independent signatures of a destabilization of pre-existing coronal magnetic field structures. The configurations of several active regions can be sourced regions of CMEs formation. The study of the formation, acceleration and propagation of CMEs requires advanced and powerful observational tools in different spectral ranges as many 'stages' as possible between the photosphere of the Sun and magnetosphere of the Sun and magnetosphere of the Earth. In conclusion, this range is a current regime of solar radio bursts during CMEs events.

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Space Weather: The Solar Perspective

Cited by 425 publications

References 247 publications

Nonlinear force-free field extrapolation of the coronal magnetic field using the data obtained by the Hinode satellite

Nonlinear force-free field extrapolation of the coronal magnetic field using the data obtained by the Hinode satellite

Space Weather: Physics, Effects and Predictability

Probability of Solar Flares Turn out to Form a Coronal Mass Ejections Events due to the Characterization of Solar Radio Burst Type II and III

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