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TeachMeFinance.com - explain Sunspot Group Classification Sunspot Group Classification The term 'Sunspot Group Classification' as it applies to the area of the weather can be defined as ' A: A small single unipolar sunspot or very small group of spots without penumbra. B: Bipolar sunspot group with no penumbra. C: An elongated bipolar sunspot group. One sunspot must have penumbra. D: An elongated bipolar sunspot group with penumbra on both ends of the group. E: An elongated bipolar sunspot group with penumbra on both ends. Longitudinal extent of penumbra exceeds 10 deg. but not 15 deg. F: An elongated bipolar sunspot group with penumbra on both ends. Longitudinal extent of penumbra exceeds 15 deg. H: A unipolar sunspot group with penumbra'. Previous 5 Terms: Sunny sunphotometer Sunrise Sunset sunspot Next 5 Terms: Sunspot Number sun-synchronous Super 301 Super Typhoon Supercell About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.