Table 3 Estimated Dstmin based on formulae obtained from Wu and Lepping (2016) for a MC event that occurred on 17 March 2015
From: The first super geomagnetic storm of solar cycle 24: “The St. Patrick’s day event (17 March 2015)”
Event | Dstmin formulaa | Pred. Dst bmin | Source of \( B_{{z_{ \hbox{min} } }} \) c | Errors (%) | |
|---|---|---|---|---|---|
(a) | 168 MCs | Dstmin = −3.30 + 6.82 × \( B_{{z_{ \hbox{min} } }} \) | −160.2 | MC | 29.8 |
(b) | 168 MCs | Dstmin = 8.04 + 6.34 × \( B_{{z_{ \hbox{min} } }} \) | −137.8 | Sheath or MC | 39.6 |
(c) | 94 MC SHOCK | Dstmin = −22.89 + 6.12 × \( B_{{z_{ \hbox{min} } }} \) | −163.7 | MC | 28.2 |
(d) | 94 MCSHOCK | Dstmin = 11.01 + 6.47 × \( B_{{z_{ \hbox{min} } }} \) | −137.8 | Sheath or MC | 39.6 |
(e) | 94 MCSHOCK | Dstmin = −21.18 + 5.26 × \( B_{{z_{ \hbox{min} } }} \) | −142.2 | Sheath | 37.6 |
(f) | 74 MCNOSHOCK | Dstmin = 4.18 + 5.83 × \( B_{{z_{ \hbox{min} } }} \) | −129.9 | MC | 43.0 |
(g) | 83 MC1995–2003 | Dstmin = 0.83 + 7.85 × \( B_{{z_{ \hbox{min} } }} \) | −179.7 | MC | 21.2 |