Comments on “New Insights From the 2003 Halloween Storm Into the Colaba 1600 nT Magnetic Depression During the 1859 Carrington Storm” by S. Ohtani (2022)
Bibliographic record
Abstract
Abstract The Colaba, India ∼−1,600 nT magnetic spike caused by an interplanetary sheath magnetic field inducing a “dayside R1‐field aligned current wedge” during the Carrington magnetic storm proposed by Ohtani (2022), https://doi.org/10.1029/2022JA030596 seems highly improbable. Normal interplanetary magnetic field intensities of ∼5 nT have previously been shown to be sufficient to explain the ∼+120 nT sudden impulse (SI + ) observed at Colaba during the storm (Tsurutani et al., 2018, https://doi.org/10.1002/2017JA024779 ). Magnetohydrodynamic theory (Kennel et al., 1985, https://doi.org/10.1029/GM034p0001 ) predicts a maximum of 4× magnetic field compression by a fast shock, giving an interplanetary sheath field of ∼20 nT, a value too low to support the Ohtani (2022), https://doi.org/10.1029/2022JA030596 hypothesis. The Ohtani (2022), https://doi.org/10.1029/2022JA030596 (and G. Siscoe et al., 2006, https://doi.org/10.1016/j.asr.2005.02.102 ) claim of a further 10× amplification of the interplanetary sheath fields has not been verified in near‐Earth interplanetary sheaths. The original (Tsurutani et al., 2003, https://doi.org/10.1029/2002JA009504 ) hypothesis that an interplanetary coronal mass ejection magnetic cloud (MC) having southward magnetic fields of ∼90 nT caused the Carrington magnetic storm main phase of peak SYM‐H/Dst = −1,760 nT seems more likely. The short time between the SI + and the storm main phase onset implies a foreshortened interplanetary sheath. The extremely rapid recovery of the magnetic storm was hypothesized by Tsurutani et al. (2018), https://doi.org/10.1002/2017JA024779 as being due to nonlinear ring current losses. We point out that the Hydro‐Quebec 1989 storm was caused by multiple shock‐sheaths and MCs (Lakhina & Tsurutani, 2016, https://doi.org/10.1186/s40562‐016‐0037‐4 ) unlike the interplanetary causes of the Carrington storm. The Hydro‐Quebec event was a “stealth” magnetic storm.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.002 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".