CMEs, or Coronal Mass Ejections
they can both be very disruptive to human activity on earth and in space
I suppose that you think to a "solar flare".Coronal mass ejections are bigger than solar flares.
Bubbles of ionized gas emitted from the Sun are called Coronal Mass Ejections or CMEs for short.
Some effects are coronal spots and reconnection events. Also, most solar flares and coronal mass ejections originate in the magnetically active regions around the visible sunspot groupings.
There are a variety of types of solar storms. These include solar flares, geomagnetic storms, as well as coronal mass ejections.
Solar flares and coronal mass ejections.
Solar flares and coronal mass ejections. You can see the daily sunspot number, and movies of interesting CMEs and flares, at spaceweather.com.
Coronal ejections or solar flares or prominences
About 2 million mph. Pretty Fast ! That answer may be referring to "coronal mass ejections" rather than the closely related phenomenon of solar flares.
No. Coronal mass ejections (CMEs) do blast considerable amounts of solar plasma into space, but the Sun's gravity is so high that most of it falls back into the Sun; only trace amounts reach the Earth's orbit. But even if the Sun were not rotating, the Earth is moving. So even if a still Sun were to pop a CME directly at the Earth, the Earth would move out of the path in a few days.
They are called "sunspots". They are areas where concentrated tangled magnetic flux lines exit through the photosphere of the sun (locally cooling it, resulting in the dark appearance), propelling solar plasma outward as coronal loops (prominences), solar flares, and coronal mass ejections. Sunspots always occur in pairs, one being a "north" magnetic pole and the other a "south" magnetic pole.