Solar Activity and Interplanetary Disturbances

Details Solar Activity and Interplanetary Disturbances Solar Activity and Interplanetary Disturbances

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ap%26ss.258...35o&link_type=abstract

Astrophysics and Space Science, v. 258, Issue 1/2, p. 35-46 (1997).

Astronomy and Astrophysics

Astrophysics

Scientific paper

The Sun is not only a source of energy but also a tremendous source of interplanetary disturbances. The continuous stream of plasma (solar wind) is propelled by a pressure gradient near the photosphere. The pressure gradient and the Sun's gravitational field drive the plasma to supersonic velocities at the Earth's orbit. Solar activity is discussed in terms of the characteristics of the origin, x-ray flare class, optical classification, radio emission, energy particle emission and geophysical effects. Solar activities during March-June 1991 and February 20-21, 1994 are but two activities in recent times which resulted in large scale Interplanetary Waves (IPW), medium-scale gravity waves and geomagnetic disturbances. The disturbances of these activities are also discussed.

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