It missed us by 9 days

The real danger from a solar storm is the "twang" as the Earth's magnetic field is distorted by the pressure of the particle flow and then snaps rapidly back into place because that moving magnetic field will interact with conductors and generate a current in proportion to their length relative to the direction of movement. The most vulnerable part of the modern world is large solar PV farms as they have huge lengths of conductors and the breakdown voltage of the semiconductor junctions is so low. How do you run the factories to make new solar panels if they use solar power too? You'd need a massive stockpile of panels in protected storage to recover from that in a reasonable period of time.