Been giving some thought to the "three days of darkness" scenario. My approach is "what natural occurrences could actually jive with prophetic or metaphysical writings. I believe that what has often been attributed to (supernatural) events must also have a corresponding connection to natural laws of the universe. Much of which we haven't discovered yet, but are possible within scientific theory.
So if this cosmic cloud does have the potential to "energize" the entire solar system, the sun, and planet earth, we have a plausible connection to a heating up of earth's core, which would cause some degree of expansion. This in itself would accelerate magma movement and could trigger earthquake activity and volcanism. A simultaneous eruption of Yellowstone and any of the other caldera volcanoes, would certainly throw enough ash into the atmosphere to cause a period of darkness. Since there has not been such an occurrence within recorder history it would be an event "such as man has never seen before"
The reply that mentioned the selling out of Hepa filters was the beginning of this line of thinking.
edit on 6-8-2012 by nightstalker46 because: (no reason given)