Flare buildup - 21 May 1980

Conference · Fri Jan 01 04:00:00 EST 1982 · Adv. Space Res.; (United States)

OSTI ID:6400506

Harvey, J W

The decaying solar active region that crossed the central meridian on May 20, 1980 at latitude S13 deg produced a major flare (2B/X1) at 2054 on May 21. This region was a target of the international Flare Buildup Study and was well observed. The buildup was characterized by little flare activity during two days prior to the major flare but a great deal of activity in the filament that separated the opposite magnetic polarities of the active region. Large proper motions of sunspots and magnetic fields suggest that the magnetic field was stressed prior to the flare. The immediate trigger of the flare appears to have been an eruption of new magnetic flux in the center of the active region. The new flux erupted in a configuration that decreased the net flux of the active region and contributed to the decay of the region.

• Research Organization: Kitt Peak National Observatory, Tucson, AZ
• OSTI ID: 6400506
• Report Number(s): CONF-820582-
• Conference Information: Journal Name: Adv. Space Res.; (United States) Journal Volume: 2
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
CHROMOSPHERE
ELECTROMAGNETIC RADIATION
GOES SATELLITES
IONIZING RADIATIONS
MAGNETIC FLUX
RADIATIONS
SATELLITES
SOLAR ACTIVITY
SOLAR ATMOSPHERE
SOLAR CORONA
SOLAR FLARES
STARSPOTS
STELLAR ATMOSPHERES
STELLAR CORONAE
SUNSPOTS
X RADIATION