Alternate Definitions for umbra

include archived terms

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Term: umbra
Definition:

The dark core or cores (umbrae) in a sunspot with penumbra, or a sunspot lacking penumbra.
NOAA SWPC SpWx Glossary Planetary Astrophysics Heliophysics
Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan
Permalink:
https://n2t.net/ark:/99152/h10043

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[watch]
Term: umbra
Definition:
SWEET Earth Science
Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan
Permalink:
https://n2t.net/ark:/99152/h22513