Today I was just reviewing “global conductivity models” and “geomagnetically induced currents” for the Internet Foundation. The common practice seems to be to use 1D and 3D conductivity models, then use the fairly dense magnetotelluric (MT) arrays for the changing magnetic fields that induce the changes. There are LOTS of electromagnetic datasets. You just need the conductivity models for the natural features or for human infrastructure impacts.
On the Regional Variability of dB/dt and Its Significance to GIC by A. P. Dimmock , L. Rosenqvist , D. T. Welling , A. Viljanen , I. Honkonen , R. J. Boynton , and E. Yordanova at
Use of Magnetotelluric Measurement Data to Validate/Improve Existing Earth Conductivity Models at https://www.epri.com/research/products/3002014856
I am personally curious about salinity imaging now after reading these.
“salinity” “geomagnetic induced currents” has 392 entry points
“geomagnetic induced currents” has 5330 entry points
“magnetic storms” has 330,000 entry points
“magnetotelluric” has 435,000 entry points
“geomagnetic” OR “geomagnetism” has 6.6 Million entry points
If you like esoteric things, you might find this one interesting. It is not an answer to your question, but when searching for global datasets, I look in every nook and cranny.
“cosmic ray” “magnetic pulse” has 3280 entry points
While power systems failures are large, much more frequently you need to be concerned with
“electromagnetic interference” “magnetic storms” has 6320 entry points
“electromagnetic noise” “magnetic storms” has 5020 entry points
Each of these is a distinct and identifiable community – each with their own methods, data, models and habits of sharing ( or not ) on the Internet.
The magnetometer arrays are pretty messy still. I wish IRIS.edu would invest more time and energy to standardizing, collecting and sharing. And sharing algorithms and hosting communities.
Richard Collins, Director, The Internet Foundation