วันศุกร์, 26 เมษายน 2024, 4:25PM
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อภิธานศัพท์: อภิธานศัพท์ฟิสิกส์ (อวกาศ)
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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.
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SUNSPOT NUMBER A daily index of SUNSPOT activity (R), defined as
R = k (10 g + s) where S = number of individual spots, g =
number of sunspot groups, and k is an observatory factor.
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SURGE A jet of material from ACTIVE REGIONs that reaches coronal heights
and then either fades or returns into the CHROMOSPHERE along the
trajectory of ascent.
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