Which volcanic hazard can block the sunlight and temporarily cool the earth’s surface?

If a volcano epulses massive amounts of dust into the atmosphere, those two things will/can happen.
The events will last until the dust lays down on the earth.

The volcanic hazard that can block sunlight and cool earth i think is stone

Honestly "global warming" may be a slight possiblity, however they called it "climate change" because its not real, in fact we had one of our coldest days here not too long ago, and the "issues" with this subject is a blindfold for actual problems.