[winoneforthegipper]

Indeed, globally.
Last month, when this first started, I read qualified information of the yellowstone caldera, seems the hotspot that generated Yellowstone's last intense blast has actually drifted away from the caldera. That would argue that a catastrophic explosion is less likely.

[winoneforthegipper]

This series by the BBC will provide you all with a quick and excellent information upgrade on Volcanic tremors and their associated meanings.

http://www.youtube.com/watch?v=mHha9I73U44

http://www.youtube.com/watch?v=ceAwZpz_AvY&feature=related

This is my favourite for determining different recordings on webicorders and siesmographs.

http://www.youtube.com/watch?v=Ej9jdJ-913Y&feature=SeriesPlayList&p=C455114941F2C645

There are other videos in the series if you wish to continue viewing.

[ETL]

Map of the Yellowstone Hot Spot Trail. Reveals the movement of the North American tectonic plate over the last approximate 15 million years.

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Under Yellowstone, Magma Pocket 20% Larger Than Thought

"The finding, based on the most detailed model yet of the region's geologic plumbing, suggests that Yellowstone's magma chamber contains even more fuel for a future "supereruption" than anyone had suspected.

The model shows that a 45-mile-wide (72-kilometer-wide) plume of hot, molten rock rises to feed the supervolcano from at least 410 miles (660 kilometers) beneath Earth's surface.

The deepest part of the plume actually sits beneath the town of Wisdom, Montana, about 150 miles (241 kilometers) from Yellowstone National Park."

NationalGeographic.com:
http://news.nationalgeographic.com/news/2009/12/091215-yellowstone-volcano-magma-plume-larger.html