About 7 minutes.
IIRC that’s less than the amount of time it would take light to traverse from the sun to the earth. Such a blast would be stupendous, but it canna change the laws of physics!
Yes - about 7 minutes. But - I wish it could be like that Twilight Zone episode where the Sun goes and the guy (Merideth Burgess??) figures it out while it is still night in Manhatten. He has the rest of the night to set things right - and finally gets the gumption to ask the girl out on a date and they spend the evening together before the dawn brings them around to the exploding Sun.
Alas - like most catastrophic things - you won’t have time to prepare and it will be in an instant. So, remember to give your loved ones an extra hug and a kiss each time.
Depends upon the speed of the mass ejected. Typically take 2 to 5 days for a CME to reach earth. Some faster, some slower. Apparently the speeds range from 500 km/s to 3200 km/s for the mass itself. Protons can reach earth much faster, at somewhat lesser than the speed of light.
With SOHO and other sats monitoring the sun, we should get a day or so warning if not more. That is, if 0Bozo’s wunnerful gummint decided to actually make it public instead of using it as their crisis- remember, can’t let a good crisis go to waste.