I've been following this in the news for some time now ... the giant magma bubble underneath Yellowstone National Park.
I think we can all agree that something of this magnitude truly would be an extinction level event. What is disconcerting is that scientists disagree on when it might happen. It could be tomorrow, or it could be 100,000 years from now.
We might tend to say, "So what?" and lump it in with many of the other alleged ELEs that could befall the earth sometime in the future.
The reason I'm taking this one seriously is because of recent news coming from America's first national park.
Scientists say that there are three indicators that the magma is getting ready to burst through and become the largest super volcano known to man.
1) A general, relatively rapid heating up of the ground in the existing Yellowstone caldera.
2) A swelling, or general rising up of the ground.
3) An increase in seismic activity in the area.
So, here's what is happening:
1) Temps on the ground are indeed rising. The park service had to close a road in one area because the asphalt was melting. Measured ground temps overall generally are increasing.
2) The ground is rising by 10 centimeters a year. It has been for some time now.
3) There have been 500 measurable seismic events centered in the Yellowstone caldera over the past week or so. The highest one was 4.5. Although seismic events in the area are fairly common, the latest series show a definite rise in incidence.
NASA has diverted a special "spy" plane from observing terrorist locations to make constant flights over Yellowstone with its ground-penetrating cameras to keep an eye on the magma dome. The roof of the dome is just a few kilometers from the surface, as is indicated by the depth of the origination point of the earthquakes.
Just about everybody agrees that if this one blows it could very well be an ELE because of the "nuclear winter" that all that ash in the atmosphere would create by blocking out the sun worldwide. Locally, meaning 20 western states, most life would be snuffed out in the first couple of weeks.
Here is a good video about this. I encourage all to view it, then comment.
Added in edit: I just read the comments to this video and apparently this video has a number of ads. I apologize. I didn't realize. I use adblocker and never see ads in YouTube videos, so I didn't realize. I hope they aren't too intrusive.