|
The most interesting phenomenon was the mid-SEB outbreak in the apparition of 1998. Miyazaki found a group of white spots of SEBZ located at 315-345 degrees of system-II (L2) in March 31, 1998. This source of outbreak moved slowly forward at the rotation period of 9h55m18.8s. A lot of white spots, which were supplied from the source, expanded rapidly forward the SEBZ, and the preceding end reached at L2=100 in early August. Many white spots of outbreak filled up the region of 190 deg. of the longitude in SEBZ. This preceding end had the rotation period of 9h54m21.4s.
When the preceding white spots reached at L2=100 deg. in early August, they disappeared as the white spots got into the SEBn. This feature was maintained at the preceding until the end of apparition. The source of outbreak moved slowly forward, but the activity of outbreak source became weaker in September. Therefore the white spots, which were located at the following end, disappeared within the region of 50 deg. until the end of September. The longitude of the preceding end maintained at about L2=100-130 since October. On the other side, because the following end of outbreak moved slowly forward, it became shorten to the 40 deg. length in December.
To PageTop
|
