The Scalable Plasma Ion Composition and Electron Density (SPICED) Model for Earth's Inner Magnetosphere

Matthew K. James*, Tim K. Yeoman, Petra Jones, Jasmine K. Sandhu, Jerry Goldstein

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)
12 Downloads (Pure)


The plasma mass loading of the terrestrial equatorial inner magnetosphere is a key determinant of the characteristics and propagation of ULF waves. Electron number density is also an important factor for other types of waves such as chorus, hiss and EMIC waves. In this paper, we use Van Allen Probe data from September 2012 to February 2019 to create average models of electron densities and average ion mass in the plasmasphere and plasmatrough, near the Earth’s magnetic equator. These models are combined to provide an estimate of the most probable plasma mass density in the equatorial region. We then use machine learning to form a set of models which are parameterized by the SuperMAG ring current index (SMR) based on the design of the average models. The resulting set of models are capable of predicting the average ion mass, electron density and plasma mass density in the range 2 < L < 5.9 and over all MLT sectors during a range of conditions where -75 < SMR < + 27 nT.
Original languageEnglish
Article numbere2021JA029565
Number of pages32
JournalJournal of Geophysical Research: Space Physics
Issue number9
Early online date28 Aug 2021
Publication statusPublished - 13 Sept 2021


Dive into the research topics of 'The Scalable Plasma Ion Composition and Electron Density (SPICED) Model for Earth's Inner Magnetosphere'. Together they form a unique fingerprint.

Cite this