Computer Science
Scientific paper
Oct 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994adspr..14..721a&link_type=abstract
Advances in Space Research, vol. 14, no. 10, p. 721-724
Computer Science
11
Coronal Loops, Solar Cycles, Solar Flares, Solar Radio Emission, Fourier Analysis, Gamma Rays, Goes Satellites, Solar Maximum Mission, Solar Protons, Solar X-Rays, Type 4 Bursts
Scientific paper
The power spectrum was calculated for the time series of the Long Duration Event (LDE) type flare occurrences during the last three solar cycles (the 20th, the 21st and the first part of the 22nd cycle). LDE-type flares (Long Duration Events in Soft X-rays (SXR) are associated with the interplanetary protons (Solar Energetic Particles (SEP) and STIP as well), energized coronal archs and radio type 4 emission. Generally, in all the cycles considered, LDE-type flares mainly originated during a 6-year interval of the respective cycle (2 years before and 4 years after the sunspot cycle maximum). The following significant periodicities were found: (1) in the 20th cycle: 1.4, 2.1, 2.9, 4.0, 10.7 and 54.2 months; (2) in the 21st cycle: 1.2, 1.6, 2.8, 4.9, 7.8, and 44.5 months; (3) in the 22nd cycle, till March 1992: 1.4, 1.8, 2.4, 7.2, 8.7, 11.8, and 29.1 months; (4) in all interval (1969-1992): 1. the longer periodicities: 232.1, 121.1 (the dominant at 10.1 of year), 80.7, 61.9 nd 25.6 months. 2. the shorter periodicities: 4.7, 5.0, 6.8, 7.9, 9.1, 15.8 and 20.4 months. Solar variability has an extremely complex time dependence. The Sun is a multiperiodic system. The strong periodicities 'near 155 and 270 days' were found also in the LDE-type flare occurrence.
No associations
LandOfFree
Periodicities of the LDE-type flare occurrence (1969-1992) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Periodicities of the LDE-type flare occurrence (1969-1992), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Periodicities of the LDE-type flare occurrence (1969-1992) will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1069409