Abstract There have been a few previous studies claiming that the effects of geomagnetic storms strongly depend on orientation magnetic cloud portion coronal mass ejections (CMEs). Aparna & Martens, using halo-CME data from 2007 to 2017, showed field filaments at location where CMEs originate Sun can be used credibly predict geoeffectiveness being studied. The purpose this study is extend t...

Context. We study two coronal mass ejections (CMEs) observed between April 1 to 2, 2019 by both the inner Wide-Field Imager for Parker Solar Probe (WISPR-I) onboard (PSP) spacecraft (located about 46 and 38 solar radii during this period) heliospheric imager (HI-1) Terrestrial Relations Observatory Ahead (STEREO-A) spacecraft, orbiting Sun at 0.96 au. This is first of CME observations from view...

To improve and extend the predictive capabilities of two space weather models currently in operational use at the National Oceanic and Atmospheric Administration’s Space Environment Center (NOAA/SEC). The first, the Wang & Sheeley model (WS), predicts the background solar wind speed and interplanetary magnetic field (IMF) at Earth. The WS model is being improved though the incorporation of addi...

Abstract Coronal mass ejections (CMEs) – among the most energetic events originating from Sun can cause significant and sudden disruption to magnetic particulate environment of heliosphere. Thus, in current era space-based technologies, early warning that a CME has left is crucial. Some CMEs exhibit signatures at solar surface lower corona as eruption occurs, thus enabling their prediction befo...

Eruptions of coronal mass ejections (CMEs) from the Sun are usually associated with a number signatures that can be identified in solar disc imagery. However, there cases which CME is well observed coronagraph data missing clear low-coronal counterpart. These events have received attention during recent years, mainly as result increased availability multi-point observations, and now known “stea...

This paper reviews recent progress in the research on the initiation and propagation of CMEs. In the initiation part, several trigger mechanisms are discussed; In the propagation part, the observations and modelings of EIT waves/dimmings, as the EUV counterparts of CMEs, are described.

This paper provides a short review of some of the basic concepts related to the origin of coronal mass ejections (CMEs). The various ideas which have been put forward to explain the initiation of CMEs are categorized in terms of whether they are force-free or non-force-free and ideal or nonideal. A few representative models of each category are examined to illustrate the principles involved. At...

The explosion of space weather research since the early 1990s has been partly fueled by unprecedented, uniform, and extended observations solar disturbances from space- ground-based instruments. Coronal mass ejections (CMEs) closed magnetic field regions high-speed streams (HSS) open-field on Sun account for most relevant to weather. main consequences CMEs HSS are their ability cause geomagneti...

A wide variety of radio propagation and scattering phenomena observed when a radio source is occulted by the solar corona has formed the basis for probing the solar corona for over four decades. The purpose of this paper is to review the subject of transients — variations in the radio occultation measurements that appear different from those of the background solar wind. A major surprise in the...

Nonhuman primate embryonic stem (ES) cells have vast promise for preclinical studies. Genetic modification in nonhuman primate ES cells is an essential technique for maximizing the potential of these cells. The common marmoset (Callithrix jacchus), a nonhuman primate, is expected to be a useful transgenic model for preclinical studies. However, genetic modification in common marmoset ES (cmES) ...