Observational Characteristics of CMEs without Low Coronal Signatures

Abstract

Solar eruptions are usually associated with a variety of phenomena occurring in the low corona before, during, and after onset of eruption. Though easily visible in coronagraph observations, so-called stealth coronal mass ejections (CMEs) do not obviously exhibit any of these low-coronal signatures. The presence or absence of distinct low coronal signatures can be linked to different theoretical models to establish the mechanisms by which the eruption is initiated and driven. In this study, 40 CMEs without low coronal signatures, occurring in 2012, are identified. Their observational and kinematic properties are analyzed and compared to those of regular CMEs. Solar eruptions without clear on-disk or low coronal signatures can lead to unexpected space weather impacts, since many early warning signs for significant space weather activity are not present in these events. A better understanding of their initiation mechanism(s) will considerably improve the ability to predict such space weather events.

42 pages, 10 figures

References in corpus (5)

• Torus instability
• Ideal kink instability of a magnetic loop equilibrium
• No Trace Left Behind: Stereo Observation of a Coronal Mass Ejection without Low Coronal Signatures
• Observations and modeling of the early acceleration phase of erupting filaments involved in coronal mass ejections
• Statistical Study of Coronal Mass Ejection Source Locations: Understanding CMEs Viewed in Coronagraphs

Cited by in corpus (11)

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• The Sun's Dynamic Extended Corona Observed in Extreme Ultraviolet
• On the occurrence of type IV solar radio bursts in the solar cycle 24 and their association with coronal mass ejections
• Investigating Remote-sensing Techniques to Reveal Stealth Coronal Mass Ejections
• Linkage of Geoeffective Stealth CMEs Associated with the Eruption of Coronal Plasma channel and Jet-Like Structure
• Determining the source and eruption dynamics of a stealth CME using NLFFF modelling and MHD simulations
• The Magnetic Environment of a Stealth Coronal Mass Ejection
• Sun-to-Earth Observations and Characteristics of Isolated Earth-Impacting Interplanetary Coronal Mass Ejections During 2008-2014
• Understanding the Origins of Problem Geomagnetic Storms Associated With "Stealth" Coronal Mass Ejections
• Numerical simulations of shear-induced consecutive coronal mass ejections