Those who lived near previously Fuji-like Mt. St. Helens at the time will recall that from its first indications of awakening to massive explosion took eight weeks. I lived on Mt. Hood at the time and will be forever mindful how quickly those peaks can go from serene to extreme. As we were so mindful in the summer of 1980 when a series of tremors occurred on Hood soon after St. Helens had added the phrase "harmonic tremors" to our vocabulary. Turned out the tremors were a false alarm, the USFS had blasted a bunch of tree stumps near newly installed USGS seismicity monitors.
Europe's in far more immediate danger from its member nations' economies and that alone is a harbinger of a dreary decade. My 401(k) has already suffered a decadus horriblus. I pray for an equity decadus decentus or even fabulousness before I die.
It's just interesting to me that amidst the man-made mess, Mother Nature could pile on in that region with a geologic event. Prior to this spring I had been unaware that Iceland's volcanism was any kind of a threat to Europe. Iceland's eruptions that I can recall (Heimaey) or had read about (Surtsey) were localized in their impact.
The Jet Age is a speck in time compared to geologic time. In the relatively brief geologic time periods between eruptions of a volcanic peak, a whole lot has likely changed in the surrounding human civilization and air space. This is something residents in proximity to Italy's Mt. Vesuvius are mindful of -- will the next eruption there be on the scale of 1944, 1631 or 79 AD? No one knows what or when, they can only lay odds, hope for the best, prepare, deny, forget or move.
Oregon's Mt. Hood last erupted in a big way in the 1790s, not long before Lewis and Clark came by. The next one of any significance would be a different ballgame there. Things to ponder but not lose sleep over.
http://www.telegraph.co.uk/news/worldnew...ety-threat.htmlhttp://pubs.usgs.gov/fs/2000/fs036-00/
[i]The first sign of activity at Mount St. Helens in the spring of 1980 was a series of small earthquakes that began on March 16. After hundreds of additional earthquakes, steam explosions on March 27 blasted a crater through the volcano's summit ice cap. Within a week the crater had grown to about 1,300 feet in diameter and two giant crack systems crossed the entire summit area. By May 17, more than 10,000 earthquakes had shaken the volcano and the north flank had grown outward at least 450 feet to form a noticeable bulge.[/i]
On May 18, ka-boom.