Substorm electric fields in the evening plasmasphere and their effects on the underlying F layer

Journal Article · Sat May 01 04:00:00 EDT 1976 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JA081i013p02283· OSTI ID:7346132

Park, C G

Whistlers recorded at Siple, Antarctica (76degreeS, 84degreeW; Lapprox. =4), were used to monitor the east-west component of electric fields in the plasmasphere during moderate substorm activity. The results presented here cover Lapprox. =3.5--5 and 1400--2100 MLT. During substorms, eastward electric fields of approx.0.2 mV/m in the equatorial plane are observed in the 1600--2000 MLT sector. Inside this MLT sector the electric field appears within the experimental uncertainty of approx. +- 10 min of substorm onset, determined from auroral latitude magnetograms. The field amplitude does not depend strongly on the intensity of the magnetic disturbance observed on the ground. Simultaneous ionospheric observations show that these substorm E fields can explain large enhancements in f/sub 0/F/sub 2/ frequently observed in middle latitudes during summer evening hours. These results are consistent with theoretical predictions based on a model ionosphere-magnetosphere system. (AIP)

• Research Organization: Radioscience Laboratory, Stanford University, Stanford, California 94305
• OSTI ID: 7346132
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 81:13; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640201 -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
640203* -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EARTH ATMOSPHERE
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
F REGION
ION DRIFT
IONOSPHERE
MAGNETIC STORMS
MAGNETOSPHERE
NOISE
PLASMASPHERE
RADIATIONS
RADIO NOISE
RADIOWAVE RADIATION
WHISTLERS