@PNS Congress did authorize an official study. They estimated that a solar EMP would kill 90% of Americans (indirectly through infrastructure failure). Nothing was actually done, of course (like hardening power grid equipment).

Read up on faraday cage to store basic equipment. Try to get internet peers (NOT "ISP"s). I had three, but they all moved out of Mordor (NoVa).

While Solar EMP is a big threat, nuclear might be worse. We have no (unclassified) defense against a high altitude nuke. Detonated at high altitude, it generates an EMP that can blanket 1/2 the US. (Killing no one directly - except maybe people with pacemakers, etc.0

Nuclear EMP has far more high frequencies affecting micro-electronics than solar.

Available on Cjdns mesh: http://h.mesh.gathman.org/emp.html

I had a clearnet mirror somewhere, can't remember where atm.