October 2024 G4 Severe Geomagnetic Storm
Solar Cycle 25 · October 2024 · Peak Dst minimum -303 nT · Maximum Kp 8.7 · Disturbance Peak 2024-10-10
Daily Minimum Dst Ring-Current Evolution Curve (Kyoto WDC, nT)
Note: More negative Dst values indicate stronger equatorial ring-current intensification. Missing hours remain uninterpolated.
① Solar Eruption Dynamics
On October 8, Earth-facing AR 3848 erupted with an X1.8 flare and fast halo CME. The shock arrived October 10, driving Kp to 8.7 and plunging equatorial Dst to −303 nT.
② Infrastructure Telemetry
Grid operators in Scandinavia and Canada mitigated geomagnetically induced currents, while polar HF aviation bands experienced multi-hour daylight absorption.
③ Biological Resonance
Cohort tracking showed lower baseline HRV individuals felt heightened restlessness, whereas those practicing slow 4-2-6 breathing buffered autonomic stress effectively.