High latitude helical surge of May 22, 1989

Details High latitude helical surge of May 22, 1989 High latitude helical surge of May 22, 1989

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990soph..128..365o&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 128, Aug. 1990, p. 365-369.

Physics

2

Chromosphere, Magnetohydrodynamic Flow, Solar Activity, Solar Flares, Solar Limb, Solar Magnetic Field, Sunspots

Scientific paper

A helical surge (S 72, W 90) was recorded by a monochromatic filter at the University Observatory of Istanbul. It is a significant one at a very high latitude and without any center of activity. A sequence of the filtergrams showed some condensed points from which the motions of the plasma are traced. Different velocities were determined on each of the branches of the helical surge during its evolution. The surge reached its maximum height of 298,000 km, and the maximum velocity of this upper region was 250 km/s.

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