NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Plasmaspheric Drainage Plumes: Inner-Magnetospheric Coupling from the IMAGE/EUV PerspectivePlasmaspheric drainage plumes appear in the aftermath of periods of enhanced convection/erosion and are interpreted as a near-equatorial signature of the redistribution of thermal plasma along streamlines. Analysis of IMAGE/EUV observations from "FirstLight" through the end of calendar year 2002 reveals that for Kp greater than or equal to 3, there is an 84% probability of observing a plasmaspheric plume in EUV data. We present a statistical analysis of the geomagnetic conditions [Kp, Dst, and solar wind-induced electric field] associated with EUV plume observations. This analysis yields a peak in observational probability when Kp = 4 and Dst = -50 nT. Additionally, EUV pllume observations are associated with a solar wind-induced convection electric field at Earth [Ev, SM] characterized by bi-modal behavior with a positive mode peaked at approximately 4 m V(raised dot) m(sup -1) and a negative model that peaks at -2 mV (raised dot) m(sup -1). Analysis of the time rate of change of the plume-associated Ev, SM indicated that once the mechanism for plume formation is initiated, a slowly changing convection environment is required to allow for sufficient plume development prior to EUV detection.
Document ID
20060024810
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Adrian, Mark L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Gallagher, Dennis L.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2006
Subject Category
Geophysics
Meeting Information
Meeting: American Geophysical Union Joint Assembly 2006 Spring Meeting
Location: Baltimore, MD
Country: United States
Start Date: May 23, 2006
End Date: May 26, 2006
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

There are no available downloads for this record.
No Preview Available