Sunspots
Error
Short-term evolution of sunspots
Swedish 1m Solar Telescope
Sunspots are the most prominent manifestation of magnetic fields in the solar atmosphere. They consist of two parts, a central dark umbra and a brighter penumbra surrounding it. Convection is largely inhibited in the umbra by the strong umbral field, but not so much in the penumbra. The interaction between convective motions and magnetic fields in the penumbra gives rise to impressive fine structure and dynamics, with elongated convective cells in the radial direction and a plethora of small-scale flows within those cells.
This movie shows the short-term variability of sunspots and granulation over the course of 40 minutes. The observations were taken through a broadband filter at 436.4 nm using the Swedish 1-m Solar Telescope. They were processed to remove image blurring caused by turbulence in the Earth's atmosphere. Thanks to this technique, a very stable time series was obtained.
Download the movie clicking HERE
Movie credit: Michiel van Noort, Luc Rouppe van der Voort (ITA, University of Oslo)
Text credit: Luis Bellot Rubio (IAA-CSIC)
Source: SST Galleries
Regular sunspot observed with CHROMIS
A hole in the Sun (1/2)
A hole in the Sun (2/2)
Sunspot at high spatial resolution (1/3)
Sunspot at high spatial resolution (2/3)
Sunspot at high spatial resolution (3/3)
Sunspot in AR 11302
Sunspot with the Earth shown to scale
Circular polarisation in a sunspot
Sunspot near the limb
Sunspot near the limb
Sunspot and C5-flare
Sunspots, pores, and abnormal granules
[MOVIE] Short-term evolution of sunspots
[MOVIE] Birth of an active region
[MOVIE] Birth and death of an active region
Flux emergence and cancellation in the super-flaring active region 12673 (1/2)
[MOVIE] Flux emergence and cancellation in the super-flaring active region 12673 (2/2)