Predicting EMIC wave properties from ring current conditions observed by Van Allen Probes

Recently, we have developed a model to predict amplitude and spectrum of the electromagnetic ion cyclotron (EMIC) wave from the anisotropic ring current ion distributions. The model is derived from linear theory and nonlinear hybrid simulations in a large parameter space for homogeneous plasmas consisting of electrons, protons, and helium ions. In this study we apply our model to selected EMIC events observed by Van Allen Probes satellites. Using the plasma conditions measured by the HOPE instrument, we predict EMIC properties and compare them to wave measurements by the EMFISIS instrument. Detailed analysis of these events will be shown.