Substorm onset: Current sheet avalanche and stop layer
نویسندگان
چکیده
منابع مشابه
Relationship between wave-like auroral arcs and Pi2 disturbances in plasma sheet prior to substorm onset
Wave-like substorm arc features in the aurora and Pi2 magnetic disturbances observed in the near-Earth plasma sheet are frequently, and sometimes simultaneously, observed around the substorm onset time. We perform statistical analyses of the THEMIS ASI auroral observations that show wave-like bright spot structure along the arc prior to substorm onset. The azimuthal mode number values of the wa...
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[1] Recently, images from the THEMIS all‐sky imager array were used to suggest that longitudinally localized enhanced plasma transport across the nightside open‐closed boundary (separatrix) ∼5.5 min before substorm onset leads to intrusion of new plasma toward the near‐Earth plasma sheet and to substorm onset via near‐Earth instability. If such reconnection‐related flow enhancements precede sub...
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We now know that substorm onset occurs within the near-Earth plasma sheet in the region associated with the Harang electric field reversal. It is also known that substorm onset is generally associated with a reduction in the large-scale convection driven by the solar wind, and that this reduction is imparted to the ionosphere a few minutes prior to substorm onset. This is the same time relative...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Space Physics
سال: 2015
ISSN: 2169-9380
DOI: 10.1002/2014ja020571