Auxiliary material for
Development of Large-Scale Birkeland Currents Determined from the Active
Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE)
B. J. Anderson1, H. Korth1, C. L. Waters2, D. L. Green2,3, V. G. Merkin1, R. J. Barnes1, L. P.
Dyrud1,4
(1) The Johns Hopkins University Applied Physics Laboratory, Laurel MD, USA.
(2) School of Mathematical and Physical Sciences, University of Newcastle, New South Wales,
Australia.
(3) Oak Ridge National Laboratory, Oak Ridge TN, USA.
(4) Draper Laboratory, Cambridge MA, USA.
Geophysical Research Letters
Introduction
Plots for the two events discussed in the paper are provided of northern hemisphere AMPERE
horizontal magnetic perturbations, B, overlaid on the corresponding radial current density, Jr,
derived as described in the paper and in the same format as the individual panels of Figures 3 and
5 in the paper. The plots are compiled in a single pdf document for each event. Magnetic noon
(AACGM coordinates) is at the top of each plot with dusk at the left, midnight at the bottom, and
dawn at the right. Each plot shows B data and Jr results for the ten-minute data window starting
at the time listed in the plot filename and shown in the upper right corner of the plot. Plots are
included starting every two minutes. Magnetic perturbations from different satellites are shown
in different color arrows. The arrow at the upper left shows the length of a 500 nT magnitude B.
The color bar at the upper left shows the scale for Jr with red showing outward (upward) current
and blue showing inward (downward) current.
1. 2014_Feb_24_1530_1700.pdf. Plots of AMPERE magnetic perturbations and radial current
density from the northern hemisphere for 24 February 2014 with start times from 1530 UT
through 1700 UT.
2. 2014_Oct_15_1830_2000.pdf. Plots of AMPERE magnetic perturbations and radial current
density from the northern hemisphere for 15 October 2014 with start times from 1830 UT
through 2000 UT.