SUNSPOT GROUP CLASSIFICATION (Modified Zurich Sunspot Classification).:

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.

More Space & Solar Terms

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

Information and definitions of the terms been taken from various reliable government publications and we have done our best to verify their accuracy. If you feel any of the definitions are incorrect or needs to be updated please contact us and we will look into it.

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