Events Studied

Table 1. Data Used in This Study

Orbit	1688	1731	1789	1797	1959
Date (1997)	24 Jan	28 Jan	02 Feb	03 Feb	18 Feb
Kp	1-	4	3+	0+	1

BBELF Events
Start, UT	12:45:25	12:10:20	21:05:00	14:46:00	1426:15
Duration, s	20	60	60	20	15
MLT	22.9	22.4	0.9	22.4	21.4
Altitude, km	4160	4150	3800	3970	3110
Invariant latitude	68.6	64.9	74.5	66.5	69.1
H⁺ energy, eV	450	448	713	721	330
He⁺ energy, eV	204	609	821	728	160
O⁺ energy, eV	169	958	910	920	115
n_H / n_i	0.630	0.394	0.244	0.273	0.149
n_He / n_i	0.193	0.111	0.308	0.125	0.342
n_O / n_i	0.165	0.487	0.435	0.595	0.749

EMIC Events
Start, UT	12:46:10	12:11:50	21:02:30	14:46:40	14:23:40
Duration, s	20	60	60	20	15
MLT	22.9	22.4	0.3	22.4	21.2
Altitude, km	4150	4140	3900	3940	3290
Invariant latitude	69.5	67.0	72.1	67.4	65.0
H⁺ energy, eV	89.6	109	134	59.0	101
He⁺ energy, eV	605	525	775	124	306
O⁺ energy, eV	131	477	205	88.3	105
n_H / n_i	0.309	0.544	0.316	0.103	0.283
n_He / n_i	0.097	0.102	0.082	0.146	0.072
n_O / n_i	0.589	0.346	0.592	0.749	0.638

UT, durations, and locations of events are approximate.