Recreating an explosion with particles


I’m new to UE4 and am trying to recreate this:

I have a dust effect where the velocity shoots up quickly then slooowly raises, like in the gif.
The part I’m stuck with is the spread, I want some random variance on the X axis, currently they all shoot straight up in a line, and I’m not sure how to make them go out in a cone like fahsion.

Any ideas?

Thanks :smiley: