Real-time simulation of the geoelectric field spatiotemporal evolution
due to geomagnetic disturbances
Abstract
We present a methodology that allows real-time simulation of the
geoelectric field (GEF) spatiotemporal evolution in a given 3-D
conductivity model of the Earth based on continuously augmented inducing
source data. The presented concept is validated using Fennoscandia as a
test region. The choice of Fennoscandia is motivated by several reasons.
First, it is a high latitude region, where the GEF is expected to be
particularly large. Second, there exists a 3-D ground electrical
conductivity model of the region. Third, the regional magnetometer
network, IMAGE, allows us to build a realistic model of the source for a
given geomagnetic disturbance. Taking the 7-8 September 2017 geomagnetic
storm as a space weather event, we show that real-time high-resolution
3-D modeling of the GEF is feasible and requires only a few tens of
seconds.