auroral zone

auroral zone

[ə′rȯr·əl ‚zōn]
(geophysics)
A roughly circular band around either geomagnetic pole within which there is a maximum of auroral activity; lies about 10-15° geomagnetic latitude from the geomagnetic poles.
References in periodicals archive ?
Geomagnetically he is closer to the auroral zone than the United Kingdom and is much better placed to ob serve this phenomenon.
For the Northern Hemisphere, the aurora should be visible mainly in North America, since the sun is illuminating most of the auroral zone in Russia and Scandinavia.
They believe this radiation is closely related to the soft radiation previously detected during rocket flights in the auroral zone.
Three bright areas dominate the dayside auroral zone (left map), the view of Uranus facing the sun as Voyager 2 swung past the rotating planet.
Furthermore, Herbert adds, this generally accepted model of the Uranian magnetic field predicts the dayside's larger auroral zone should form a long ellipse, with only two bright areas, whereas the three detected by Voyager 2's UV spectrometer give the auroral zone a more circular appearance.
The nightside auroral zone (right map) is "pretty well confined" to a single fuzzy area spanning about 10 to 15 degrees on the map and centered at about 240 degrees west by 50 degrees south, Herbert and Sandel found.
com for up to the minute information, and a gallery of exquisite photographs from the Auroral Zone.
In this respect, Prof Aylward said that Birkeland had got it wrong in that electrons do not hit our atmosphere directly, but incoming electrons alter the degree of coupling, making the auroral zones expand or contract.
He showed an example of the output of the modelling, pointing out how the solar wind opens magnetic field lines and shifts the auroral zones about 15[degrees] away from the magnetic poles.