The Search for the Substorm Current Wedge: A Comparison of SuperDARN and AMPERE Results
Near-Earth space is a region where the dynamics are best described by the motion of plasmas and the currents that flow there. To understand the chain of events that leads to space weather phenomena, the connections of the interplanetary magnetic field to the magnetosphere to the ionosphere need to be understood. In particular, during night side events called substorms currents flow along Earth’s magnetic field between the magnetosphere and the ionosphere. Incoming and outgoing field-aligned currents are part of the substorm current wedge that connects in the ionosphere and in the magnetosphere. Two scientific tools are used to calculate field-aligned currents: the magnetometers aboard the Iridium satellite constellation in the AMPERE project, and the radar network SuperDARN. A comparison between AMPERE and SuperDARN methods will be given, as well as the results for a superposed epoch analysis and spatial alignment for field-aligned current data of both instruments during substorm times in Earth’s ionosphere.
Please join us this Tuesday, June 5 in Physics 175 for our first presentation in our annual PEGASUS Summer Seminar Series.
Our first speaker is Gaelene Lerat: