Coronal holes

Detecting the Chromospheric Footpoints of the Solar Wind

Graphic image depicting SDO and IRIS full-disk observations
Tuesday, November 24, 2020

Coronal Holes present the source of the fast solar wind. However, the fast solar wind is not unimodal—there are discrete, but subtle, compositional, velocity, and density structures that differentiate different coronal holes as well as wind streams that originate within one coronal hole.

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