Table 1
Overview of nine magnetic storms analyzed. Four red auroral events driven by CME are summarized in GROUP 1. Magnetic storms in GROUP 2 are associated with large ASYM-H index and small magnetopause distance, and without Japan aurora. Magnetic storms in GROUP 3 are associated with moderate speed and moderate density, without large ASYM-H and dynamic aurora in Japan. The magnetic storm in GROUP 4 is associated with CIR and Japan aurora. The Dst, pressure corrected Dst (Dst*) are the minimum value throughout each storm. The minimum subsolar distance of model magnetopause, peak SYM-H and ASYM-H are calculated for the time interval of Japan’s nighttime (09 UT–21 UT). Solar wind density (N), speed (V) and dynamic pressure (Pd) are calculated for the corresponding main (red) and/or recovery (blue) phase of each storm.
| Date | Minimum Subsolar magnetopause (RE) | Dst (nT) | Dst* (nT) | SYM-H (nT) | ASYM-H (nT) | N (/cc) | V (km/s) | Pd (nPa) | Calculation time (UTC) |
|---|---|---|---|---|---|---|---|---|---|
| GROUP1 (slow-dense CME, with Japan aurora) | |||||||||
| 2024–06–28 | 5.72 | –107 | –122 | –118 | 207 | 56.5 | 435 | 23.1 | 1300–1800 |
| 2024–08–04 | 6.18 | –100 | –112 | –116 | 148 | 17.2 | 381 | 4.8 | 0600–1800 |
| 2024–09–12 | 5.92 | –121 | –125 | –128 | 255 | 20.2 | 489 | 8.8 | 0700–1500 |
| 2024–11–09 | 7.10 | –101 | –105 | –108 | 142 | 18.9 | 406 | 6.4 | 0800–1300 |
| 15.7 | 398 | 4.7 | 1300–1900 | ||||||
| GROUP2 (High-speed CME) | |||||||||
| 2021–11–04 | 6.61 | –105 | –106 | –117 | 216 | 7.8 | 717 | 7.7 | 0000–1400 |
| 2.4 | 632 | 1.9 | 1400–2100 | ||||||
| 2024–03–24 | 5.80 | –128 | –130 | –170 | 340 | 10.2 | 799 | 13.7 | 1500–2100 |
| GROUP3 (Moderate-speed CME) | |||||||||
| 2024–09–17 | 8.00 | –121 | –127 | –124 | 149 | 8.5 | 506 | 4.6 | 0900–1800 |
| 2024–10–08 | 8.52 | –148 | –150 | –110 | 107 | 8.0 | 418 | 2.8 | 0800–2100 |
| GROUP4 (CIR Japan aurora) | |||||||||
| 2025–03–26 | 6.29 | –62 | –67 | –81 | 123 | 24.2 | 419 | 8.4 | 1100–1500 |
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.