Yes I did...I just gave an explanation of why you do hear sounds from far distant volcanoes.
The skies and sunsets were seen, but not heard
Imagine all those guys looking at the red skies and sunset on the horizon and hearing those rumbling noises... Probably what started all those mythology monsters
Imagine all those guys looking at the red skies and sunset on the horizon and hearing those rumbling noises... Probably what started all those mythology monsters
Havn't seen one up close yet and not sure I want to.. A friend who was sailing to the US pulled up at a pretty little island in the south pacific
and started a little routine maintanace stuff on the motor of the 80 footer he was sailing on .. weather was clear .. though through the night the smallish volcanoe on the other side of the island had a bit of indegestion.The superheated air blasting upwards landed him with 140 km/h onshore winds in a few minutes , he was unable to set sail before he hit land .. which by pure chance was a 500m strip of sandy beach instead of the rocky volcanic coast of most of the island.
One of these collapsing in an oceon would be a pretty life changeing .. for most of us .. at a guess .
Havn't seen one up close yet and not sure I want to.. A friend who was sailing to the US pulled up at a pretty little island in the south pacific
and started a little routine maintanace stuff on the motor of the 80 footer he was sailing on .. weather was clear .. though through the night the smallish volcanoe on the other side of the island had a bit of indegestion.The superheated air blasting upwards landed him with 140 km/h onshore winds in a few minutes , he was unable to set sail before he hit land .. which by pure chance was a 500m strip of sandy beach instead of the rocky volcanic coast of most of the island.
One of these collapsing in an oceon would be a pretty life changeing .. for most of us .. at a guess .
Yep, Thera (Santorini) did a good job on the Minoans and Krakatoa made a nice mess of the surrounding area as well...aside from a few other spectacular "temper tantrums" of other volcanoes as well
Yep, Thera (Santorini) did a good job on the Minoans and Krakatoa made a nice mess of the surrounding area as well...aside from a few other spectacular "temper tantrums" of other volcanoes as well
Yeah I remember seeing something on Foxtel about that 1883 eruption. It created a huge tsunami. Terrifying stuff. As for the minoans I recall it decimated the whole lot. It was a very flourishing and advanced bunch of people too at the time. Talk about a waste...
Yeah I remember seeing something on Foxtel about that 1883 eruption. It created a huge tsunami. Terrifying stuff. As for the minoans I recall it decimated the whole lot. It was a very flourishing and advanced bunch of people too at the time. Talk about a waste...
That program was on SBS years ago if it's the one I think you saw.
Wiped out a lighthouse that was pretty high on a cliff.
Yeah I remember seeing something on Foxtel about that 1883 eruption. It created a huge tsunami. Terrifying stuff.
The Krakatoa eruption created a tsunami around 120-150 feet high along the coasts nearby. The Thera blast set off one that rode several miles inland on parts of Crete, so you're looking at something at least of the same height and probably even higher.
Funny thing, the climate upheavals during the 5-6th century that were recorded in Europe, the Middle East and Africa were most likely caused by an earlier eruption of Krakatoa ( I think, for memory, around 450AD) that was even larger. The Chinese record a series of very cool summers and bitter winters at the time that followed what they recorded as "low rumbling sounds and dark clouds" in the s/se at around the same time. They also speak about the red sunsets and dark sun at midday. Ice core samples from Greenland record an increase in sulphuric acid and volcanic dust at that time too.
Makes you wonder what the effects would be of any supervolcanoes on the sea bed ..... if they blew ....
That would be even worse... hundreds of billions of tons of water would flow into the magma chamber as the caldera cracked open. You'd have the mother of all phreatic eruptions, outside of an asteroid hitting the oceans. The tsunamis would smash every coastline in whatever ocean it happened to go off in. What's worse, they'd make the tsunamis that formed during the Krakatoa and Thera eruptions look like pond ripples.
That would be even worse... hundreds of billions of tons of water would flow into the magma chamber as the caldera cracked open. You'd have the mother of all phreatic eruptions, outside of an asteroid hitting the oceans. The tsunamis would smash every coastline in whatever ocean it happened to go off in. What's worse, they'd make the tsunamis that formed during the Krakatoa and Thera eruptions look like pond ripples.
That would be even worse... hundreds of billions of tons of water would flow into the magma chamber as the caldera cracked open. You'd have the mother of all phreatic eruptions, outside of an asteroid hitting the oceans. The tsunamis would smash every coastline in whatever ocean it happened to go off in. What's worse, they'd make the tsunamis that formed during the Krakatoa and Thera eruptions look like pond ripples.
Wow! Why is that? I would have thought that if it happened deep in the ocean with all the pressure and the cold water it would just "fizz" quietly? Are pressure and cold a bad mix with Magma?
Last edited by multiweb; 25-10-2009 at 08:05 PM.
Reason: spelling
Wow! Why is that? I would have thought that if it happened deep in the ocean with all the pressure and the cold water it tould just "fizz" quietly? Are pressure and cold a bad mix with Magma?
Water and magma don't mix...you'd have 4 degree water flowing onto 1200 degree molten rock, and the moment it hit the magma it would flash vapourise, build up pressure in the magma chamber and then pop like a cork. The water pressure would hardly affect the magma....especially in a chamber the size of the one at Yellowstone. It would probably make it worse, in fact, so far as the explosion is concerned. But once it went off, it'd be the equivalent of several hundred thousand megatons of explosive potential.
Water and magma don't mix...you'd have 4 degree water flowing onto 1200 degree molten rock, and the moment it hit the magma it would flash vapourise, build up pressure in the magma chamber and then pop like a cork. The water pressure would hardly affect the magma....especially in a chamber the size of the one at Yellowstone. It would probably make it worse, in fact, so far as the explosion is concerned. But once it went off, it'd be the equivalent of several hundred thousand megatons of explosive potential.
As for the minoans I recall it decimated the whole lot. It was a very flourishing and advanced bunch of people too at the time. Talk about a waste...
Are pressure and cold a bad mix with Magma?
