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Title: ON THE INTERPRETATION OF THE SUDDEN COMMENCEMENT OF GEOMAGNETIC STORMS

Abstract

The propagation and geometric attenuation of hydromagnetic waves in the geomagnetic field are calculated by the methods of geometrical optics. The waves are assumed to be generated by point sources located at a distance of 6 earth radii from the center of the earth. It is shown that the ray tracing method candnot be used to explain the rise time of sudden commencements of geomagnetic storms. However, the calculated propagation times of hydromagnetic disturbances can give an understanding of delay times and latitude dependence of arrival times. If extended sources are considered, the following conclusion results from the analysis: According to geometric optics, hydromagnetic disturbances of the fast mode produced at 6 earth radii by the interaction of a solar plasma front with the earth's magnetosphere will reach the earth only if they are produced in a region within a radius of a few thousand kilometers of the subsolar point. (auth)

Authors:
;
Publication Date:
Research Org.:
Lockheed-California Co., Burbank
Sponsoring Org.:
USDOE
OSTI Identifier:
4115936
NSA Number:
NSA-18-007603
Resource Type:
Journal Article
Journal Name:
Journal of Geophysical Research (U.S.)
Additional Journal Information:
Journal Volume: Vol: 69; Other Information: Orig. Receipt Date: 31-DEC-64
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
PHYSICS; ABSORPTION; BEAMS; CONFIGURATION; EARTH; EQUATIONS; INTERACTIONS; MAGNETIC FIELDS; MAGNETOHYDRODYNAMICS; MOTION; PERFORMANCE; PLASMA; SHOCK WAVES; SUN; TURBULENCE; VARIATIONS

Citation Formats

Stegelmann, E J, and von Kenschitzki, C H. ON THE INTERPRETATION OF THE SUDDEN COMMENCEMENT OF GEOMAGNETIC STORMS. Country unknown/Code not available: N. p., 1964. Web. doi:10.1029/JZ069i001p00139.
Stegelmann, E J, & von Kenschitzki, C H. ON THE INTERPRETATION OF THE SUDDEN COMMENCEMENT OF GEOMAGNETIC STORMS. Country unknown/Code not available. doi:10.1029/JZ069i001p00139.
Stegelmann, E J, and von Kenschitzki, C H. Wed . "ON THE INTERPRETATION OF THE SUDDEN COMMENCEMENT OF GEOMAGNETIC STORMS". Country unknown/Code not available. doi:10.1029/JZ069i001p00139.
@article{osti_4115936,
title = {ON THE INTERPRETATION OF THE SUDDEN COMMENCEMENT OF GEOMAGNETIC STORMS},
author = {Stegelmann, E J and von Kenschitzki, C H},
abstractNote = {The propagation and geometric attenuation of hydromagnetic waves in the geomagnetic field are calculated by the methods of geometrical optics. The waves are assumed to be generated by point sources located at a distance of 6 earth radii from the center of the earth. It is shown that the ray tracing method candnot be used to explain the rise time of sudden commencements of geomagnetic storms. However, the calculated propagation times of hydromagnetic disturbances can give an understanding of delay times and latitude dependence of arrival times. If extended sources are considered, the following conclusion results from the analysis: According to geometric optics, hydromagnetic disturbances of the fast mode produced at 6 earth radii by the interaction of a solar plasma front with the earth's magnetosphere will reach the earth only if they are produced in a region within a radius of a few thousand kilometers of the subsolar point. (auth)},
doi = {10.1029/JZ069i001p00139},
journal = {Journal of Geophysical Research (U.S.)},
number = ,
volume = Vol: 69,
place = {Country unknown/Code not available},
year = {1964},
month = {1}
}