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Jon Greif

Location of Photo:

Alpine, CA, USA

Date/Time of photo:

October 26, 2023 at noon PDT


Lunt LS50 50 mm Hydrogen alpha pressure tumed refractor, ZWO ASI178MM camera, Skywatcher AZGTI mount with solar tracking, ASI Cap capture software, Pixinsight 1.8.9-2 processing software.


Quite a few solar prominences visible at the edges of the sun, even on a hazy, cloudy day in Alpine. Also notable is a coronal hole (arrow) which is currently emitting large flares and, as it moves into what scientists call "geoeffective" position could cause increased geomagnetic activity on Earth -- anything from prominent auroras to communication disruptions.