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We have various threads and posts on the topic of the Earth's magnetic field. Now, "a new mapping effort by the US Geological Survey (USGS) shows how the hazards of geomagnetic storms are not the same all over Earth — and they're especially worrisome in northern Minnesota," and particularly up by the Canadian border, which I would expect means that parts of southern Canada, e.g., Western Ontario and Southern Manitoba would be similarly susceptible.
Geoelectric hazard maps for the continental United States
http://onlinelibrary.wiley.com/doi/10.1002/2016GL070469/epdf
http://geomag.usgs.gov/
I presume there is a similar effort in Canada.
Here's an older 2015 publication - http://geomag.usgs.gov/downloads/publications/Bedrosian_et_al-Geophysical_Research_Letters.pdfTo generate the US-wide geomagnetic storm hazard map, Love and his team merged two important sets of data.
One was several decades' worth of geomagnetic storm measurements, taken by monitoring stations all over the nation. The other was an ongoing "magnetotelluric" survey.
During a magnetotelluric survey, crews stick big electrodes into the soil, record the signal with recording machines, and move the stations over a large area for several weeks. The data they pick up reveals how rock layers, the water table, and other factors deep underground affect the conductivity of that region — and, in step, how much electricity a geomagnetic storm can induce there.
Geoelectric hazard maps for the continental United States
http://onlinelibrary.wiley.com/doi/10.1002/2016GL070469/epdf
http://geomag.usgs.gov/
I presume there is a similar effort in Canada.