Playtz: A [Faraday Cage](https://en.m.wikipedia.org/wiki/Faraday_cage) would likely be your best bet. It’s essentially a mesh cover of conductive material that redirects electromagnetic waves away from whatever is inside.
thrownawaaa4: A Faraday Cage. The easiest way to get one is just buy a metal trash can with a metal lid.
Darklance: The military does it all the time. The movie fantasy of Russian or terrorist EMP causing military helicopters to fall from the sky is BS. Source: former military communications tech.
Pulled off a forum: https://forums.spacebattles.com/threads/to-what-extent-is-military-equipment-hardened-against-emps.353605/
MIL-STD 188-125-1 HEMP Hardening (Fixed Facilities)
MIL-STD 188-125-2 HEMP Hardening (Transportable Systems)
MIL-STD 202 Environmental Requirements Component Level
MIL-STD 810 Environmental Requirements Box Level
MIL-STD 461 EMI Requirements (Subsystems)
MIL-STD 464 EMI Requirements (Systems)
FluffyBunny2002: EMP and solar flares affect different things.
Solar flares affect very long cables (more than a few hundred miles) and cause DC voltage to appear on these wires. These very long wires tend to be things like power grids or telephone lines.
The DC voltage is a major problem for power grid transformers which require pure AC power. These can malfunction if exposed to DC voltage from a solar flare. The power grid operator can install DC voltage detectors and shut down the power line when DC voltage is detected. Alternatively, they can use “series compensation” of the power line which stops the DC voltage completely and can also boost the power line’s AC efficiency (but is very expensive).
EMP affects shorter cables from about 1-2 feet up to a few hundred feet. Very small electronic device like phones, watches, laptops should be OK unless connected to external wires.
For things with longer wires or bigger systems, industrial machines, cars, etc. Then these could be sensitive.
Protection can be internal: adding ultrafast trainsient suppressor diodes at both ends of any wires.
Or external: use of a Faraday cage. Don’t forget that deep bunkers can use the ground as a Faraday cage and large heavy buildings with lots of concrete and rebar also axt like Faraday cages. So, in general something like a nuclear plant is immune because there is so much concrete surrounding anything electrical and the uncovered bits are already very high voltage, which is much stronger than an EMP so aren’t at risk.
ballistic-jelly: When I was in the USAF, our equipment was EMP protected by a series of diodes that were designed to fry in order to protect the rest of the system. Once the diodes blew, the system would still be operational, but the board would need to be replaced to maintain is EMP protection. Thus was over 40 years ago.
NoCreativityForAUser: Faraday cage. Get a 100% metal basket or trash can (with metal lid) and put your electronics inside. Protected by science^^TM
hirmuolio: EMP would iduce current in long conductors. Disconnecting things should stop large currents from forming. This should at least stop anything from catching on fire.
eharper9: So throwing your phone under a bunch of blankets wont help?
ihateavg: when was the last time that you or anyone you know had their electronics damaged by solar flares or EMPs
MtStarjump: Quick point. You don’t need to. Show me one person whose appliance has been fucked by a solar flare. Not being negative just I hear a lot about it yet never heard of any consequence. One of those things like show me someone whose arm has been broken by an angry swan.