1. sunward - Adjective
2. sunward - Adverb
Toward the sun.
Source: Webster's dictionaryEquatorial anomaly Electric currents created in sunward ionosphere. Source: Internet
Other types of auroras have been observed from space, e.g."poleward arcs" stretching sunward across the polar cap, the related "theta aurora", citation and "dayside arcs" near noon. Source: Internet