Multi-Hour Ahead Dst Index Prediction Using Multi-Fidelity Boosted Neural Networks

• URL: http://arxiv.org/abs/2209.12571v1
• Date: Mon, 26 Sep 2022 10:38:07 GMT
• Title: Multi-Hour Ahead Dst Index Prediction Using Multi-Fidelity Boosted Neural Networks
• Authors: A. Hu, E. Camporeale, B. Swiger
• Abstract summary: Disturbance storm time (Dst) index has been widely used as a proxy for the ring current intensity. We present a new model for predicting $Dst$ with a lead time between 1 and 6 hours.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The Disturbance storm time (Dst) index has been widely used as a proxy for the ring current intensity, and therefore as a measure of geomagnetic activity. It is derived by measurements from four ground magnetometers in the geomagnetic equatorial regions. We present a new model for predicting $Dst$ with a lead time between 1 and 6 hours. The model is first developed using a Gated Recurrent Unit (GRU) network that is trained using solar wind parameters. The uncertainty of the $Dst$ model is then estimated by using the ACCRUE method [Camporeale et al. 2021]. Finally, a multi-fidelity boosting method is developed in order to enhance the accuracy of the model and reduce its associated uncertainty. It is shown that the developed model can predict $Dst$ 6 hours ahead with a root-mean-square-error (RMSE) of 13.54 $\mathrm{nT}$. This is significantly better than the persistence model and a simple GRU model.

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