CUSP

Japanese: CUSP
CUSP


[Interface structure]
The magnetopause is not a simple surface, but has a layered structure that varies depending on the location. The area between 9:00 and 15:00 on the daytime side, centered around noon, that is connected by magnetic field lines passing through the vicinity of geomagnetic latitude 76° to 80° is called the cusp, and is an area where the magnetic field is weak and magnetosheath plasma can directly penetrate into the magnetosphere. This cusp is the boundary between the magnetic field lines that open toward the tail on the nighttime side and those that close at low latitudes (Figure 3).

*Some of the terminology that mentions "CUSP" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:


[境界面の構造]
 磁気圏境界面は,単なる面ではなく場所によって異なる層状構造をもっている。昼間側正午を中心として9~15時の領域で地磁気緯度76゜~80゜付近を通る磁力線で結ばれているところは,カスプcuspと呼ばれ,磁場が小さく磁気シースプラズマが直接磁気圏内に侵入しうる領域である。このカスプは夜側の尾部に向かって開いた磁力線と低緯度側で閉じる磁力線の境界になっている(図3)。…

※「CUSP」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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