Observations and statistics of the plasmasphere boundaries from the Van Allen Probes

We deduce the cold electron plasma density from NASA Van Allen Probes measurements throughout 2012-2019. We then extract two of the plasmasphere boundaries. We first use the gradient method for locating the plasmapause at L
pp
and, then, the $100\mathrm{~cm}^{-3}$ density threshold for the plasmasphere outer edge located at L
100
. The sharp gradient of the plasmapause is only defined in 53% of cases, while L
100
is defined for $\sim 85\%$ of cases. Differences and similarities between L
pp
and L
100
are discussed. L
100
is demonstrated to bound the plasmasphere at large L-shell in the dusk where L
pp
gradients often lack. We generate new empirical density models of the plasmasphere boundaries binned by L-shell, magnetic local time (MLT), and the maximum of the Kp index over 24 hours (Kp*).