Equivalent Ionospheric Currents over North America and Greenland

Curator: James Weygand
Institute of Geophysics and Planetary Physics, UCLA
Phone: (310) 825-1995
E-mail: jweygand(at)igpp.ucla.edu

Additional Contact: Dr. Olaf Amm
Finnish Meteorological Institute
telephone: +358-9-1929-4689
E-mail: Olaf.Amm(at)fmi.fi

James Weygand's Office Hours:

Monday through Friday from 07:00 to 18:00 (PST).

Data Access:

Contact James Weygand. E-mail above.
Olaf and I would like to check each event thoroughly before giving out the data.

Reference:

Amm, O., and A. Viljanen, Ionospheric disturbance magnetic field continuation
from the ground to the ionosphere using spherical elementary current systems,
Earth Planets Space, 51,431-440, 1999.

The Code:

The original Matlab code was provide by Dr. Olaf Amm [Amm and Viljanen, 1999].
James Weygand has adapted the code to include ground magnetometer data from CANMOS,
CARISMA, GIMA, Greenland, MACCS, and THEMIS.

The Data

Inputs: Nearly all the data was obtained from: CANMOS, CARISMA, GIMA, Greenland, MACCS,
and THEMIS Some data was obtained directly from the PIs.

Outputs: Equivalent ionospheric currents over most parts of Canada, Alaska,
until the Greenland coast (roughly corresponding to an area of about 40 degrees
latitude and 120 degrees longitude)"

Equivalent Ionospheric Current Data Availability

Arrays Involved	Interval (YYYY/MM/DD to YYYY/MM/DD)
CANMOS, CARISMA, GIMA, Greenland, MACCS, and THEMIS	2007/12/01 to 2008/02/29

Example Event

Equivalent Ionospheric Currents

Scaling factors of spherical elementary currents systems (proportional to FAC for uniform conductances)

Acknowledgments

CANMOS and CARISMA: These data were obtained rom the Canadaian Space Science Data Portal.
The Canadian Space Science Data Portal is funded in part by the Canadian Space Agency (CSA),
the Alberta Science and Research Authority (ASRA), and the University of Alberta (UofA).
Also see CARISMA rules of the road.
CANMOS data were obtained by the Canadian Magnetic Observatory Network (CANMON),
maintained and operated by the Geological Survey of Canada, provided the data used in this study -
http://gsc.nrcan.gc.ca/geomag.

GIMA: acknowledge the Geophysical Institute, University of Alaska Fairbanks.

Greenland: acknowledge the Danish Meteorological Institute (DMI).

MACCS: Magnetometer Array for Cusp and Cleft Studies (MACCS) array is
supported by US National Science Foundation grant ATM-0827903 to Augsburg College.
We would like to would like to thank the following:
M. J. Engebretson, D. Murr, and E.S. Steinmetz at Augsburg College and the MACCS team.

THEMIS: see THEMIS rules of the road.

Questions or Corrections can be directed to : jweygand$at$igpp.ucla.edu
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