Observational analysis of ephemeral regions from AutoTAB catalog in cycles 24-25 finds 1.2-day average lifetimes, supergranular-scale footpoint growth that saturates, and complex tilt distributions that support their placement at the low-flux end of bipolar magnetic regions.
https://www.frontiersin.org/journals/astronomy-and-space- sciences/articles/10.3389/fspas.2023.1177097
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Large ephemeral regions and their tilt angles
Observational analysis of ephemeral regions from AutoTAB catalog in cycles 24-25 finds 1.2-day average lifetimes, supergranular-scale footpoint growth that saturates, and complex tilt distributions that support their placement at the low-flux end of bipolar magnetic regions.