2021年07月の太陽

SpaceWeather news 2021-07-01 NCREASING CHANCE OF FLARES: When the week began, sunspot AR2835 was big. Now it's really big. The active region has nearly doubled in size over the past 24 hours: movie. Now twice as wide as Earth, its primary dark core is inset in this magnetic map from NASA's Solar Dynamics Observatory: As the sunspot has grown, its magnetic structure has become more complex. Note the mixing of north (+) and south (-) magnetic fields in this area. When magnetic fields of opposite polarity bump together, they can explode. The process is known as magnetic reconnection, and it is responsible for solar flares. Any flares today will be geoeffective as the sunspot is directly faciing Earth. Solar flare alerts: SMS Text.

HIGH LATITUDE SUNSPOT: An unusual sunspot has emerged in the sun's southern hemisphere. Located 43 degrees south of the sun's equator, AR2844 is a rare high-latitude sunspot:
Sunspots are a mostly-equatorial phenomenon. According to the Solar-Terrestrial Center of Excellence, 95% of sunspots in the historical record have latitudes less than 30 degrees, and nearly three quarters were crowded within 20 degrees of the sun's equator.
AR2844 is an outlier, located 2 to 3 times as far from the equator as a typical sunspot. Since the Space Age began, only a handful of sunspots have been seen at such high latitudes. Now is the time to look for them. Research shows that high-latitude sunspots appear most often during the early years of solar cycles, and Solar Cycle 25 is just getting started.