Stonyhurst Disk for 20th April 2023 - Calcium K
Properly aligned solar disk with 15 degree grid shows that the 2 bands of magnetic activity (sunspots and white plages) are following the rotation of the Sun precisely at about 22 degrees N and S respectively.
As a solar cycle progresses, the activity gets closer to the solar equator so this cycle has a way to go yet.
AR 3282 is seen to be >15 degree in length which helps classify it as:
McIntosh sunspot classification system
F - Bipolar group, penumbra about both spots, length >15 degrees
h - Largest spot has symmetric penumbra > 2.5 degree diameter N-S.
i- Many spots between leader and follower, none with developed penumbra
Fhi
Stonyhurst Disk for 20th April 2023 - Calcium K
Properly aligned solar disk with 15 degree grid shows that the 2 bands of magnetic activity (sunspots and white plages) are following the rotation of the Sun precisely at about 22 degrees N and S respectively.
As a solar cycle progresses, the activity gets closer to the solar equator so this cycle has a way to go yet.
AR 3282 is seen to be >15 degree in length which helps classify it as:
McIntosh sunspot classification system
F - Bipolar group, penumbra about both spots, length >15 degrees
h - Largest spot has symmetric penumbra > 2.5 degree diameter N-S.
i- Many spots between leader and follower, none with developed penumbra
Fhi