Kano, R., T. Shimizu, and T. D. Tarbell, Hinode Observation of Photospheric Magnetic Activities Triggering X-ray Microflares Around a Well-developed Sunspot, ApJ, 720, 1136-1145 (2010) (ADS)
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Date: 2019 November 26
Key cartoon from a nice paper offering an overview of magnetic conditions associated with microflares, using Hinode magnetic and X-ray observations. Here "MMF" is a "Moving Magnetic Feature", perhaps related to the sea-serpent analog of a partially submerged flux tube. Several morphological types seem to underpin the microflaring activity.