Lets start with Crater Lake National park, one on the most beautiful parks I have ever been to. Its past is only legend now, but is the stories of the residents over 7,700 years ago the eruption of Mt. Mazama almost was the end of the world to them. Now the eruption is only a deep memory now in those who survived, but the results can still be seen of the devastation that created what we now know as 'Crater Lake".
Crater Lake - Oregon ::
CRATER LAKE NATIONAL PARK: Expanded Home Page
CVO Website - Crater Lake, Oregon
Krakatoa - August 27,1883,
1. The 23km square island of Krakatoa existed at a height of 450m above sea level. The blast leveled most of the island to 250m below sea level.
2. Pyroclastic flows traveled as far as 40km from the island consuming traversing ships in fire and ash.
3. The sound of the final explosion was heard over 4500km away and covered 1/13th of the Earth's surface.
4. The eruption generated tsunamis 40m high that devastated nearby coastlines.
5. The final death toll from pyroclastic flows, volcanic bombs, and tsunamis was calculated to be a devastating 36,417.
The huge eruption of Krakatoa is still keeping the world cool and damping down the rate of sea level rise caused by climate change, thanks to the ashes and aerosols that it spewed out in 1883.
More than six cubic miles of rock, ash, and pumice were ejected from the volcano, near the Indonesian island of Rakata in the Sunda Strait.
The explosion generated the loudest sound in human history, and was heard from more than 2,500 miles away.
Krakatoa helps to keep Earth cool - Telegraph
Steam Explosions, Earthquakes, and Volcanic Eruptions—What’s in Yellowstone’s Future?
Steam Explosions, Quakes, and Volcanic Eruptions—What’s in Yellowstone’s Future? | USGS Fact Sheet 2005-3024
There are just a couple of volcanoes that have changed or will change the way we were living on a world wide scale. Just because there have not been any major global catastrophes lately, does not mean it will not happen. One does not have to be a geologist to under stand that most of us are living on a time bomb. This by the way will cause climate change much faster than man could ever hope to.