Real 3-hourly geomagnetic ap index 1932-present --- solar-driven magnetic storms, 93 years (CC BY 4.0, GFZ)
Standard analysis sees: heavy-tailed; right-skewed; time-irreversible (sharp rises, slow decay). The atlas finds no named structure, but the source is distinctively extreme on Level Statistics:wd_classification (-2.1z) — beyond what the standard bank predicts for it.
Level Statistics:wd_classification | -2.1z | bank-miss 1.4σ |









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| Nearest neighbor | Distance | |
|---|---|---|
| Seismic Event Rate | 3.41 | |
| Accel Sit | 3.63 | cross-origin |
| Multiplicative Cascade | 3.72 | cross-origin |
This source does not rank extreme on any metric.