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SolarHam Daily Sunspot Summary
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Data is valid for October 17, 2017

Intensity Colored (Open Map)
AIA 304

Solar Flux (1)
Sunspot # (-)
Area (-)

Click HERE for an interactive solar flare and CME summary for recent events.

SWPC Synomptic Map
Intensity Enhanced w/ Regions
Catania Sunspot Groups

Magnetic Class: See bottom of page for more information.
Spot Class: See bottom of page for more information.
Up / Down: / arrows in brackets indicate the change from previous day.
Area Size: Refers to Sunspot Area measured in Millionths to the Sun's visible hemisphere.
"New" Icon: The Icon displays for 48 hours after a Sunspot being numbered.

Visible Disk is Currently Spotless

Magnetic Class :

The magnetic class of sunspots is important in determining how potentially volatile particular active regions may be. Sunspots are regularly observed using instruments capable of determining the magnetic polarity of sunspots and active regions. By also applying laws which have been formulated over the years, visual observations can also be used to establish the magnetic polarity and complexity of spot groups. There are basically 7 magnetic types of sunspots that are classified. They are described as follows:


A - Alpha (single polarity spot).
B - Beta (bipolar spot configuration).
G - Gamma (atypical mixture of polarities).
BG - Beta-Gamma (mixture of polarities in a dominantly bipolar configuration).
D - Delta (opposite polarity umbrae within single penumbra).
BD - Beta with a Delta configuration.
BGD - Beta-Gamma with a Delta configuration.

Example: A region labelled as having a magnetic classification of BG indicates that the sunspot region contains a mixture of magnetic polarities, but the dominant polarity of the group is bipolar. Potentially very powerful and potent regions are those which have classifications of BG, BD and BGD. As magnetic complexity increases, the ability of an active region to spawn major energetic events likewise increases.

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