i need to figure out how to figure out how to look for delta sunspots

[farm24]

i want to class sunspots myself but i cant figure out how to see delta sunspots on the SDOs' magnetogram because a beta-gamma sunspot looks the same as a beta-gamma-delta sunspot

[Vancanneyt Sander]

The difference is quit easy, let's start with the theory first:

• Beta-Gamma: A bipolar sunspot group but complex enough so that no line can be drawn between spots of opposite polarity.
• Delta: The umbrae of opposite polarity in a single penumbra.
• Beta-Gamma-Delta: A sunspot group with a beta-gamma magnetic configuration but contains one (or more) delta sunspots.

So, with that out of the way it's very simple. If a beta-gamma region (where the polarities are so mixed that we can't draw a line between the two polarities) develops a spot of opposite polarity within the penumbral area of a sunspot we have a beta-gamma-delta region. So, when comparing the HMI with HMIIF imagery of a sunspot region you'll need to look if there are delta structures. If that's the case, we have a beta-gamma-delta region. 

In this example, an active region from 2014, I've marked the delta spots on HMI and HMIIF images (arrows) and put up some - and + of the main polarity spots. We define 3 small delta structures in this region (this one was responsible for an X1 and X3 solar flare):

Best way to learn it from examples and training. You can browse our archive and look for beta-gamma-delta regions and try to find the sweet (delta) spots or you can try to define the magnetic complexity based on the current regions. And it also helps to get both high resolution images and put them in photoshop to make a comparison. 

[farm24]

1 hour ago, Vancanneyt Sander said:

The difference is quit easy, let's start with the theory first:

• Beta-Gamma: A bipolar sunspot group but complex enough so that no line can be drawn between spots of opposite polarity.
• Delta: The umbrae of opposite polarity in a single penumbra.
• Beta-Gamma-Delta: A sunspot group with a beta-gamma magnetic configuration but contains one (or more) delta sunspots.

So, with that out of the way it's very simple. If a beta-gamma region (where the polarities are so mixed that we can't draw a line between the two polarities) develops a spot of opposite polarity within the penumbral area of a sunspot we have a beta-gamma-delta region. So, when comparing the HMI with HMIIF imagery of a sunspot region you'll need to look if there are delta structures. If that's the case, we have a beta-gamma-delta region. 

In this example, an active region from 2014, I've marked the delta spots on HMI and HMIIF images (arrows) and put up some - and + of the main polarity spots. We define 3 small delta structures in this region (this one was responsible for an X1 and X3 solar flare):

Best way to learn it from examples and training. You can browse our archive and look for beta-gamma-delta regions and try to find the sweet (delta) spots or you can try to define the magnetic complexity based on the current regions. And it also helps to get both high resolution images and put them in photoshop to make a comparison. 

ok thank you i see now