Donglai Ma

Jun 16, 2024 | agupubs.onlinelibrary.wiley.com | Chao Yue |Jacob Bortnik |Donglai Ma |Qiushuo Wang

1 Introduction The terrestrial ring current is a distinctive current system flowing toroidally around the Earth, centered at the equatorial plane over a geocentric distance ranging from L ∼ 2 to ∼7. Here the McIlwain L is the distance in Earth radii (RE) from the Earth's center to the point where a geomagnetic field line crosses the equator (Daglis et al., 1999). The enhancement of ring current causes global decreases in the Earth's surface magnetic field, known as geomagnetic storms.