Detection of Rapid Coronal Hole Boundary Reconfigurations Using Correlation Dimension Mapping

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Abstract
This study investigates how magnetic reconnection reshapes coronal-hole (CH) boundaries during eruptive events. Using high-cadence EUV and magnetogram observations from the Solar Dynamics Observatory on 2015 June 4, we apply correlation dimension mapping (CDM), a technique designed to quantify the geometric complexity of CH boundaries across multiple spatial scales. We find that localized jet eruptions are systematically accompanied by rapid increases in the correlation dimension, indicating enhanced boundary irregularity during magnetic reconfiguration. Two of the three detected events correspond to coronal jets occurring within a multipolar magnetic configuration characterized by a polarity inversion line and a fan–spine topology favorable for reconnection. In both cases, the peak in boundary complexity occurs shortly after the jet’s intensity maximum, suggesting a delayed response of the large-scale magnetic structure to localized reconnection. These results demonstrate that CDM provides a sensitive diagnostic of dynamic restructuring at CH boundaries. The method offers a new way to track the geometric response of open–closed magnetic interfaces during eruptive activity and may help identify geometric signatures associated with reconnection-driven events in the solar corona.
Funding Information
  • Agencia Nacional de Investigación y Desarrollo (21210996)
  • ANID ∣ Fondo Nacional de Desarrollo Científico y Tecnológico (1242013)
  • NSF Shine Program (2229336)
  • NASA's Heliophysics Supporting Research Program (80NSSC24K0264)
  • NASA Guest Investigator Program (80NSSC25K7679)

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