Physics
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978nciml..22..633a&link_type=abstract
Nuovo Cimento, Lettere, vol. 22, Aug. 19, 1978, p. 633-638. Consiglio Nazionale delle Ricerche
Physics
Particle Flux Density, Solar Cosmic Rays, Ground Stations, Italy, Scintillation Counters, Solar Flares, Solar Physics, Solar Radio Bursts
Scientific paper
Some preliminary information is reported concerning an outstanding solar-particle event recorded at ground level by a cosmic-ray ionizing-component supermonitor at Bologna, Italy, on May 7, 1978. The recorded particle event occurred during the recovery phase of a large Forbush decrease, was associated with a flare on the NW limb of the sun, had a short rise time of about 8 min, and persisted for approximately 1 hr. It is found that the particle beam was slightly asymmetric toward the east, the particle transit time from the sun was not greater than 24 min, and the particles were accelerated and diffused near the sun for about 13 min. It is suggested that a particle acceleration process operated in a magnetic bottle connecting two active regions of opposite polarity. Similarities between the recorded event and two previous events of comparable maximum energy are noted.
Attolini M. R.
Cavani C.
Cecchini Simone
Galli Marcello
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