edu.ucar.opensky::articles:26655 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T19:39:51.881062 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d78w3jbt https://doi.org/10.5281/zenodo.7236154 https Related JournalArticle #1 Simulated Trapping of Solar Energetic Protons for the 8-10 March 2012 Geomagnetic Storm: Impact on Inner Zone Protons as Measured by Van Allen Probes Simulated trapping of solar energetic protons for the 8-10 March 2012 geomagnetic storm: Impact on inner zone protons as measured by Van Allen Probes 2023-02-01T00:00:00Z publication https://n2t.org/ark:/85065/d78w3jbt https://doi.org/10.1029/2022JA031106 Hudson, Mary K. author Engel, M. A. author Kress, B. T. author Li, Z. author Patel, M. author Selesnick, R. S. author UCAR/NCAR - Library publisher Solar energetic protons (SEPs) have been shown to contribute significantly to the inner zone trapped proton population for energies lt;100 MeV and L gt; 1.3 (Selesnick et al., 2007, https://doi. org/10.1029/2006sw000275). The Relativistic Electron Proton Telescope (REPT) on the Van Allen Probes launched 30 August 2012 observed a double-peaked (in L) inner zone population throughout the 7-year lifetime of the mission. It has been proposed that a strong SEP event accompanied by a CME-shock in early March 2012 provided the SEP source for the higher L trapped proton population, which then diffused radially inward to be observed by REPT at L sim; 2. Here, we follow trajectories of SEP protons launched isotropically from a sphere at 7 Re in 15 s cadence fields from an Lyon-Fedder-Mobarry coupled to Rice Convection Model global magnetohydrodynamic (MHD) simulation driven by measured upstream solar wind parameters. The timescale of the interplanetary shock arrival is captured, launching a magnetosonic impulse propagating azimuthally along the dawn and dusk flanks inside the magnetosphere, shown previously to produce SEP trapping. The MHD-test particle simulation uses Geostationary Operational Environmental Satellite (GOES) proton energy spectra to weight the initial radial profile required for the radial diffusion calculation over the following 2 years. GOES proton measurements also provide a dynamic outer boundary condition for radial diffusion. A direct comparison with REPT measurements 20 months following the trapping event in March 2012 supports this novel combination of short-term and long-term evolution of the newly trapped protons. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2023 American Geophysical Union (AGU). None eng geoscientificInformation