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Jon Greif

Location of Photo:

Alpine, CA, USA

Date/Time of photo:

June 11, 2024 at 11:00 am PDT


Lunt LS50Ha solar telescope, SkyWatcher AZ-GTI mount, ZWO ASI178MM camera, ASICAP and Pixinsight software.


Today's sun activity is high thanks to an M9.6 flare from AR3697. This active region continues to be the lead flare producer despite its location beyond the solar limb. It has just rotated out of view behind the 4 o'clock edge, lower right limb of the sun in this image (taken at 11 AM from our patio in Alpine). During the past day, AR3697 produced two M flares, plus another 14 Cs. That’s after three M's and an X flare during one 4-hour period – all from beyond the solar limb. In related news, it’s now official, the near-X flare (an M9.8) from AR3697 on June 8 created the strongest proton, or solar energetic particle, storm since 2017. [Info from Sun News at EarthSky-org.]