I recall a story about the Canary Islands El Hierro and La Palma. EL Heirro had a major landslide that created its crescent shape, this landslide was believed to have caused a huge tsunami that reached the east coast of the US with huge waves. La Palma has a similar fault line that bisects the island. One theory is that is if this fault goes, half of the island would fall into the sea causing a Tsunami that would be several hundred meters in height as it hits the eastern US. Seems geologists are somewhat split, some think the Island will spilt in half over a long period of time, some think it will happen in one catastrophic event. The evidence at El Hierro seems to suggest it will happen all at once.
I've seen stories about this threat on either History or Discovery channel. Pretty scary. Mother Nature hiccups and cities are destroyed, landmasses reformed, and tens of thousands of people die. Since the Richter and the Moment Magnitude (Mw) scales are logarithmic, an event of Mw 10 with an approximate yield of 15 gigatons of TNT would likely be a planet-wide disaster. I was just reading that the Chicxulub impact is estimated to have been a Mw 12.33 event, corresponding to 95.2 teratons. BTW, It seems that Luis and Walter Alvarez have been vindicated. I've read that just a year ago a large panel of scientists concluded that the Chicxulub impact was indeed the cause of the K/T extinction. (Cited at Wikipedia, but here's a link to the original article in Science: http://www.sciencemag.org/content/327/5970/1214.abstract.) Kim -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of erikhansen@thebluezone.net Sent: Saturday, March 19, 2011 11:26 AM To: Utah-Astronomy@mailman.xmission.com Subject: [Utah-astronomy] Atlantic Immune to Tsunamis? I recall a story about the Canary Islands El Hierro and La Palma. EL Heirro had a major landslide that created its crescent shape, this landslide was believed to have caused a huge tsunami that reached the east coast of the US with huge waves. La Palma has a similar fault line that bisects the island. One theory is that is if this fault goes, half of the island would fall into the sea causing a Tsunami that would be several hundred meters in height as it hits the eastern US. Seems geologists are somewhat split, some think the Island will spilt in half over a long period of time, some think it will happen in one catastrophic event. The evidence at El Hierro seems to suggest it will happen all at once.
I recall many said the Chicxulub created a tsunami that was still a hundred meters when crossing the American Great Plains. These recent tsunamis are peanuts compared to what is possible. The problem is too many humans live in low lying costal regions.
I've seen stories about this threat on either History or Discovery
channel. Pretty scary. Mother Nature hiccups and cities are destroyed, landmasses reformed, and tens of thousands of people die.
Since the Richter and the Moment Magnitude (Mw) scales are logarithmic, an event of Mw 10 with an approximate yield of 15 gigatons of TNT would likely be a planet-wide disaster. I was just reading that the Chicxulub impact is estimated to have been a Mw 12.33 event, corresponding to 95.2 teratons.
BTW, It seems that Luis and Walter Alvarez have been vindicated. I've read that just a year ago a large panel of scientists concluded that the Chicxulub impact was indeed the cause of the K/T extinction. (Cited at Wikipedia, but here's a link to the original article in Science: http://www.sciencemag.org/content/327/5970/1214.abstract.)
Kim
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of erikhansen@thebluezone.net Sent: Saturday, March 19, 2011 11:26 AM To: Utah-Astronomy@mailman.xmission.com Subject: [Utah-astronomy] Atlantic Immune to Tsunamis?
I recall a story about the Canary Islands El Hierro and La Palma. EL Heirro had a major landslide that created its crescent shape, this landslide was believed to have caused a huge tsunami that reached the east coast of the US with huge waves.
La Palma has a similar fault line that bisects the island. One theory is that is if this fault goes, half of the island would fall into the sea causing a Tsunami that would be several hundred meters in height as it hits the eastern US. Seems geologists are somewhat split, some think the Island will spilt in half over a long period of time, some think it will happen in one catastrophic event.
The evidence at El Hierro seems to suggest it will happen all at once.
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
There are other models that show that a La Palma event would not be as devastating as once thought: http://www.ngi.no/en/News-archive/News/PhD-in-Numerical-modelling-of-tsunami... and some leading tsunami and mega-tsunami scientists disagree that any large or mega-tsunami would come out of La Palma: http://www.arizonaenergy.org/WaterEnergy/What%20is%20a%20mega-tsunami%20and%...
From this article http://docs.google.com/viewer?a=v&q=cache:e8MugMtbub4J:www.lapalma-tsunami.c... looks like the US would only receive a wave about 3 meter's high. Still power, still big enough to cause some major damage but not the 100m high wave that was talked about in the Discovery presentation on this subject. That material btw, was presented in the Discovery show before it was released to the scientific community and before proper modeling was done. Europe and Africa would receive waves less than 10m high. Again, damaging and big enough to penetrate well inland like the 2004 Indian Ocean the 2011 Japan Tsunami's did, and lives and property are lost, but not that gigantic wave. Finally, no large mega-tsunami has been recorded in the Atlantic or the Pacific Oceans related to a flank collapse. The collapse of Krakatau and Santorin caused devastating and catastrophic waves locally, but those waves never spread out and propagate to distant shores like an earthquake generated tsunami does. Scientific debate will continue on this as well it should and we'll see where the evidence leads. For now, I'll go with the less damaging based on past evidence and current modeling. I may have to, when I have time, compare the estimates here of La Palma to what was misplaced when Krakatau collapsed.
For general info on Tsunami: http://www.teachervision.fen.com/tsunami/resource/31103.html On Sat, Mar 19, 2011 at 11:26 AM, <erikhansen@thebluezone.net> wrote:
I recall a story about the Canary Islands El Hierro and La Palma. EL Heirro had a major landslide that created its crescent shape, this landslide was believed to have caused a huge tsunami that reached the east coast of the US with huge waves.
La Palma has a similar fault line that bisects the island. One theory is that is if this fault goes, half of the island would fall into the sea causing a Tsunami that would be several hundred meters in height as it hits the eastern US. Seems geologists are somewhat split, some think the Island will spilt in half over a long period of time, some think it will happen in one catastrophic event.
The evidence at El Hierro seems to suggest it will happen all at once.
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
-- Jay Eads
The eastern seabed is very steep, they elude to that being unpredictable. There is some relatively shallow water in the middle of the Atlantic perhaps that will consume some of the energy. I thought the biggest disagreement was about how much water would be displaced. IE wether it happened at once from one quake or from several quakes. It is a huge chunk if it happens at once.
One thing is for sure even of 20 meter wave would devastate Florida. There are other models that show that a La Palma event would not be as
devastating as once thought:
http://www.ngi.no/en/News-archive/News/PhD-in-Numerical-modelling-of-tsunami...
and some leading tsunami and mega-tsunami scientists disagree that any large or mega-tsunami would come out of La Palma:
http://www.arizonaenergy.org/WaterEnergy/What%20is%20a%20mega-tsunami%20and%...
From this article http://docs.google.com/viewer?a=v&q=cache:e8MugMtbub4J:www.lapalma-tsunami.c... looks like the US would only receive a wave about 3 meter's high. Still power, still big enough to cause some major damage but not the 100m high wave that was talked about in the Discovery presentation on this subject. That material btw, was presented in the Discovery show before it was released to the scientific community and before proper modeling was done. Europe and Africa would receive waves less than 10m high. Again, damaging and big enough to penetrate well inland like the 2004 Indian Ocean the 2011 Japan Tsunami's did, and lives and property are lost, but not that gigantic wave. Finally, no large mega-tsunami has been recorded in the Atlantic or the Pacific Oceans related to a flank collapse. The collapse of Krakatau and Santorin caused devastating and catastrophic waves locally, but those waves never spread out and propagate to distant shores like an earthquake generated tsunami does. Scientific debate will continue on this as well it should and we'll see where the evidence leads. For now, I'll go with the less damaging based on past evidence and current modeling. I may have to, when I have time, compare the estimates here of La Palma to what was misplaced when Krakatau collapsed.
For general info on Tsunami:
http://www.teachervision.fen.com/tsunami/resource/31103.html
On Sat, Mar 19, 2011 at 11:26 AM, <erikhansen@thebluezone.net> wrote:
I recall a story about the Canary Islands El Hierro and La Palma. EL Heirro had a major landslide that created its crescent shape, this landslide was believed to have caused a huge tsunami that reached the east coast of the US with huge waves.
La Palma has a similar fault line that bisects the island. One theory is that is if this fault goes, half of the island would fall into the sea causing a Tsunami that would be several hundred meters in height as it hits the eastern US. Seems geologists are somewhat split, some think the Island will spilt in half over a long period of time, some think it will happen in one catastrophic event.
The evidence at El Hierro seems to suggest it will happen all at once.
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
-- Jay Eads _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
I heard something on CNN today about the size of earthquakes; apparently the biggest hit subduction zones, where a crustal plate is slipping under another, as with the big Japanese quake. Does the Atlantic have subduction zones? Thanks, Joe --- On Sat, 3/19/11, erikhansen@thebluezone.net <erikhansen@thebluezone.net> wrote:
From: erikhansen@thebluezone.net <erikhansen@thebluezone.net> Subject: Re: [Utah-astronomy] Atlantic Immune to Tsunamis? To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Saturday, March 19, 2011, 12:40 PM
The eastern seabed is very steep, they elude to that being unpredictable. There is some relatively shallow water in the middle of the Atlantic perhaps that will consume some of the energy. I thought the biggest disagreement was about how much water would be displaced. IE wether it happened at once from one quake or from several quakes. It is a huge chunk if it happens at once.
One thing is for sure even of 20 meter wave would devastate Florida.
There are other models that show that a La Palma event would not be as
devastating as once thought:
http://www.ngi.no/en/News-archive/News/PhD-in-Numerical-modelling-of-tsunami...
and some leading tsunami and mega-tsunami scientists disagree that any large or mega-tsunami would come out of La Palma:
http://www.arizonaenergy.org/WaterEnergy/What%20is%20a%20mega-tsunami%20and%...
From this article http://docs.google.com/viewer?a=v&q=cache:e8MugMtbub4J:www.lapalma-tsunami.c... looks like the US would only receive a wave about 3 meter's high. Still power, still big enough to cause some major damage but not the 100m high wave that was talked about in the Discovery presentation on this subject. That material btw, was presented in the Discovery show before it was released to the scientific community and before proper modeling was done. Europe and Africa would receive waves less than 10m high. Again, damaging and big enough to penetrate well inland like the 2004 Indian Ocean the 2011 Japan Tsunami's did, and lives and property are lost, but not that gigantic wave. Finally, no large mega-tsunami has been recorded in the Atlantic or the Pacific Oceans related to a flank collapse. The collapse of Krakatau and Santorin caused devastating and catastrophic waves locally, but those waves never spread out and propagate to distant shores like an earthquake generated tsunami does. Scientific debate will continue on this as well it should and we'll see where the evidence leads. For now, I'll go with the less damaging based on past evidence and current modeling. I may have to, when I have time, compare the estimates here of La Palma to what was misplaced when Krakatau collapsed.
For general info on Tsunami:
http://www.teachervision.fen.com/tsunami/resource/31103.html
On Sat, Mar 19, 2011 at 11:26 AM, <erikhansen@thebluezone.net> wrote:
I recall a story about the Canary Islands El Hierro and La Palma. EL Heirro had a major landslide that created its crescent shape, this landslide was believed to have caused a huge tsunami that reached the east coast of the US with huge waves.
La Palma has a similar fault line that bisects the island. One theory is that is if this fault goes, half of the island would fall into the sea causing a Tsunami that would be several hundred meters in height as it hits the eastern US. Seems geologists are somewhat split, some think the Island will spilt in half over a long period of time, some think it will happen in one catastrophic event.
The evidence at El Hierro seems to suggest it will happen all at once.
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
-- Jay Eads _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
There is a subduction zone in the Atlantic that has a recorded history of producing tsunamis. " While most of the Atlantic is free from subduction zones, there is a significant one in the southern Caribbean. http://en.wikipedia.org/wiki/Puerto_Rico_Trench This is a fault similar to the one off the coast of Japan - which means if it ruptured right and big enough, a significant tsunami could hit the Atlantic. " David On 3/20/11 12:57 PM, Joe Bauman wrote:
I heard something on CNN today about the size of earthquakes; apparently the biggest hit subduction zones, where a crustal plate is slipping under another, as with the big Japanese quake. Does the Atlantic have subduction zones? Thanks, Joe
--- On Sat, 3/19/11, erikhansen@thebluezone.net<erikhansen@thebluezone.net> wrote:
From: erikhansen@thebluezone.net<erikhansen@thebluezone.net> Subject: Re: [Utah-astronomy] Atlantic Immune to Tsunamis? To: "Utah Astronomy"<utah-astronomy@mailman.xmission.com> Date: Saturday, March 19, 2011, 12:40 PM
The eastern seabed is very
steep, they elude to that being unpredictable. There is some relatively shallow water in the middle of the Atlantic perhaps that will consume some of the energy. I thought the biggest disagreement was about how much water would be displaced. IE wether it happened at once from one quake or from several quakes. It is a huge chunk if it happens at once.
One thing is for sure even of 20 meter wave would devastate Florida.
There are other models that show that a La Palma event would not be as
devastating as once thought:
http://www.ngi.no/en/News-archive/News/PhD-in-Numerical-modelling-of-tsunami...
and some leading tsunami and mega-tsunami scientists
disagree that any
large or mega-tsunami would come out of La Palma:
http://www.arizonaenergy.org/WaterEnergy/What%20is%20a%20mega-tsunami%20and%...
From this article http://docs.google.com/viewer?a=v&q=cache:e8MugMtbub4J:www.lapalma-tsunami.c... looks like the US would only receive a wave about 3
meter's high.
Still power, still big enough to cause some major damage but
not the 100m high
wave that was talked about in the Discovery
presentation on this subject.
That material btw, was presented in the Discovery show
before it was
released to the scientific community and before proper
modeling was done.
Europe and Africa would receive waves less than 10m
high. Again, damaging
and big enough to penetrate well inland like the 2004
Indian Ocean the
2011 Japan Tsunami's did, and lives and property are lost,
but not that
gigantic wave. Finally, no large mega-tsunami has been recorded
in the Atlantic or
the Pacific Oceans related to a flank collapse.
The collapse of Krakatau
and Santorin caused devastating and catastrophic waves
locally, but those
waves never spread out and propagate to distant shores
like an earthquake
generated tsunami does. Scientific debate will
continue on this as well it
should and we'll see where the evidence leads.
For now, I'll go with the
less damaging based on past evidence and current
modeling. I may have to,
when I have time, compare the estimates here of
La Palma to what was
misplaced when Krakatau collapsed.
For general info on Tsunami:
http://www.teachervision.fen.com/tsunami/resource/31103.html
On Sat, Mar 19, 2011 at 11:26 AM,<erikhansen@thebluezone.net>
wrote:
I recall a story about the Canary Islands El
Hierro and La Palma. EL
Heirro had a major landslide that created its
crescent shape, this
landslide was believed to have caused a huge
tsunami that reached the
east coast of the US with huge waves.
La Palma has a similar fault line that bisects the
island. One theory is
that is if this fault goes, half of the island
would fall into the sea
causing a Tsunami that would be several hundred
meters in height as it
hits the eastern US. Seems geologists are somewhat
split, some think the
Island will spilt in half over a long period of
time, some think it will
happen in one catastrophic event.
The evidence at El Hierro seems to suggest it will
happen all at once.
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
-- Jay Eads _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
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This is all pretty scary stuff. We have become used to what seems a stable planet, but it's only stable on the short run. We simply haven't been tracking its hick-ups long enough to realize how insecure the world is. --- On Sun, 3/20/11, David Rankin <David@rankinstudio.com> wrote:
From: David Rankin <David@rankinstudio.com> Subject: Re: [Utah-astronomy] Atlantic Immune to Tsunamis? To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Sunday, March 20, 2011, 10:09 PM There is a subduction zone in the Atlantic that has a recorded history of producing tsunamis.
"
While most of the Atlantic is free from subduction zones, there is a significant one in the southern Caribbean.
http://en.wikipedia.org/wiki/Puerto_Rico_Trench
This is a fault similar to the one off the coast of Japan - which means if it ruptured right and big enough, a significant tsunami could hit the Atlantic.
"
David
On 3/20/11 12:57 PM, Joe Bauman wrote:
I heard something on CNN today about the size of earthquakes; apparently the biggest hit subduction zones, where a crustal plate is slipping under another, as with the big Japanese quake. Does the Atlantic have subduction zones? Thanks, Joe
--- On Sat, 3/19/11, erikhansen@thebluezone.net<erikhansen@thebluezone.net> wrote:
From: erikhansen@thebluezone.net<erikhansen@thebluezone.net> Subject: Re: [Utah-astronomy] Atlantic Immune to Tsunamis? To: "Utah Astronomy"<utah-astronomy@mailman.xmission.com> Date: Saturday, March 19, 2011, 12:40 PM
The eastern seabed is very
steep, they elude to that being unpredictable. There is some relatively shallow water in the middle of the Atlantic perhaps that will consume some of the energy. I thought the biggest disagreement was about how much water would be displaced. IE wether it happened at once from one quake or from several quakes. It is a huge chunk if it happens at once.
One thing is for sure even of 20 meter wave would devastate Florida.
There are other models that show that a La Palma event would not be as
devastating as once thought:
http://www.ngi.no/en/News-archive/News/PhD-in-Numerical-modelling-of-tsunami...
and some leading tsunami and mega-tsunami scientists
disagree that any
large or mega-tsunami would come out of La Palma:
http://www.arizonaenergy.org/WaterEnergy/What%20is%20a%20mega-tsunami%20and%...
From this article http://docs.google.com/viewer?a=v&q=cache:e8MugMtbub4J:www.lapalma-tsunami.c... looks like the US would only receive a wave about 3
meter's high.
Still power, still big enough to cause some major damage but
not the 100m high
wave that was talked about in the Discovery
presentation on this subject.
That material btw, was presented in the Discovery show
before it was
released to the scientific community and before proper
modeling was done.
Europe and Africa would receive waves less than 10m
high. Again, damaging
and big enough to penetrate well inland like the 2004
Indian Ocean the
2011 Japan Tsunami's did, and lives and property are lost,
but not that
gigantic wave. Finally, no large mega-tsunami has been recorded
in the Atlantic or
the Pacific Oceans related to a flank collapse.
The collapse of Krakatau
and Santorin caused devastating and catastrophic waves
locally, but those
waves never spread out and propagate to distant shores
like an earthquake
generated tsunami does. Scientific debate will
continue on this as well it
should and we'll see where the evidence leads.
For now, I'll go with the
less damaging based on past evidence and current
modeling. I may have to,
when I have time, compare the estimates here of
La Palma to what was
misplaced when Krakatau collapsed.
For general info on Tsunami:
http://www.teachervision.fen.com/tsunami/resource/31103.html
On Sat, Mar 19, 2011 at 11:26 AM,<erikhansen@thebluezone.net> wrote:
I recall a story about the Canary Islands El
Hierro and La Palma. EL
Heirro had a major landslide that created its
crescent shape, this
landslide was believed to have caused a huge
tsunami that reached the
east coast of the US with huge waves.
La Palma has a similar fault line that bisects the
island. One theory is
that is if this fault goes, half of the island
would fall into the sea
causing a Tsunami that would be several hundred
meters in height as it
hits the eastern US. Seems geologists are somewhat
split, some think the
Island will spilt in half over a long period of
time, some think it will
happen in one catastrophic event.
The evidence at El Hierro seems to suggest it will
happen all at once.
Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
-- Jay Eads
Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
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_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
I see these problems with their "facts". 1)The El Hierro event is believed to have caused a mega tsunami although not in "recorded history". Recorded history is a short time period, the time period humans have habited the earth is very short. 2)"Cumbre Vieja" not expected to erupt again" file that under famous last words. They do say it is still active, seems contradictory. Can't an active volcano erupt? The fault line is deep there, seems a catastrophic event is possible, however someone feels it is unlikely. Erik
Below is what the scientists committee claim as facts
"Here are a set of facts, agreed on by committee members, about the claims in these reports: - While the active volcano of Cumbre Vieja on Las Palma is expected to erupt again, it will not send a large part of the island into the ocean, though small landslides may occur. The Discovery program does not bring out in the interviews that such volcanic collapses are extremely rare events, separated in geologic time by thousands or even millions of years. - No such event - a mega tsunami - has occurred in either the Atlantic or Pacific oceans in recorded history. NONE." There are other models that show that a La Palma event would not be as
devastating as once thought:
http://www.ngi.no/en/News-archive/News/PhD-in-Numerical-modelling-of-tsunami...
and some leading tsunami and mega-tsunami scientists disagree that any large or mega-tsunami would come out of La Palma:
http://www.arizonaenergy.org/WaterEnergy/What%20is%20a%20mega-tsunami%20and%...
From this article http://docs.google.com/viewer?a=v&q=cache:e8MugMtbub4J:www.lapalma-tsunami.c... looks like the US would only receive a wave about 3 meter's high. Still power, still big enough to cause some major damage but not the 100m high wave that was talked about in the Discovery presentation on this subject. That material btw, was presented in the Discovery show before it was released to the scientific community and before proper modeling was done. Europe and Africa would receive waves less than 10m high. Again, damaging and big enough to penetrate well inland like the 2004 Indian Ocean the 2011 Japan Tsunami's did, and lives and property are lost, but not that gigantic wave. Finally, no large mega-tsunami has been recorded in the Atlantic or the Pacific Oceans related to a flank collapse. The collapse of Krakatau and Santorin caused devastating and catastrophic waves locally, but those waves never spread out and propagate to distant shores like an earthquake generated tsunami does. Scientific debate will continue on this as well it should and we'll see where the evidence leads. For now, I'll go with the less damaging based on past evidence and current modeling. I may have to, when I have time, compare the estimates here of La Palma to what was misplaced when Krakatau collapsed.
For general info on Tsunami:
http://www.teachervision.fen.com/tsunami/resource/31103.html
On Sat, Mar 19, 2011 at 11:26 AM, <erikhansen@thebluezone.net> wrote:
I recall a story about the Canary Islands El Hierro and La Palma. EL Heirro had a major landslide that created its crescent shape, this landslide was believed to have caused a huge tsunami that reached the east coast of the US with huge waves.
La Palma has a similar fault line that bisects the island. One theory is that is if this fault goes, half of the island would fall into the sea causing a Tsunami that would be several hundred meters in height as it hits the eastern US. Seems geologists are somewhat split, some think the Island will spilt in half over a long period of time, some think it will happen in one catastrophic event.
The evidence at El Hierro seems to suggest it will happen all at once.
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While most of the Atlantic is free from subduction zones, there is a significant one in the southern Caribbean. http://en.wikipedia.org/wiki/Puerto_Rico_Trench This is a fault similar to the one off the coast of Japan - which means if it ruptured right and big enough, a significant tsunami could hit the Atlantic. On 3/19/11 1:02 PM, erikhansen@thebluezone.net wrote:
I see these problems with their "facts".
1)The El Hierro event is believed to have caused a mega tsunami although not in "recorded history". Recorded history is a short time period, the time period humans have habited the earth is very short.
2)"Cumbre Vieja" not expected to erupt again" file that under famous last words. They do say it is still active, seems contradictory. Can't an active volcano erupt? The fault line is deep there, seems a catastrophic event is possible, however someone feels it is unlikely.
Erik
Below is what the scientists committee claim as facts
"Here are a set of facts, agreed on by committee members, about the claims in these reports:
- While the active volcano of Cumbre Vieja on Las Palma is expected to erupt again, it will not send a large part of the island into the ocean, though small landslides may occur. The Discovery program does not bring out in the interviews that such volcanic collapses are extremely rare events, separated in geologic time by thousands or even millions of years.
- No such event - a mega tsunami - has occurred in either the Atlantic or Pacific oceans in recorded history. NONE."
There are other models that show that a La Palma event would not be as
devastating as once thought:
http://www.ngi.no/en/News-archive/News/PhD-in-Numerical-modelling-of-tsunami...
and some leading tsunami and mega-tsunami scientists disagree that any large or mega-tsunami would come out of La Palma:
http://www.arizonaenergy.org/WaterEnergy/What%20is%20a%20mega-tsunami%20and%...
From this article http://docs.google.com/viewer?a=v&q=cache:e8MugMtbub4J:www.lapalma-tsunami.c... looks like the US would only receive a wave about 3 meter's high. Still power, still big enough to cause some major damage but not the 100m high wave that was talked about in the Discovery presentation on this subject. That material btw, was presented in the Discovery show before it was released to the scientific community and before proper modeling was done. Europe and Africa would receive waves less than 10m high. Again, damaging and big enough to penetrate well inland like the 2004 Indian Ocean the 2011 Japan Tsunami's did, and lives and property are lost, but not that gigantic wave. Finally, no large mega-tsunami has been recorded in the Atlantic or the Pacific Oceans related to a flank collapse. The collapse of Krakatau and Santorin caused devastating and catastrophic waves locally, but those waves never spread out and propagate to distant shores like an earthquake generated tsunami does. Scientific debate will continue on this as well it should and we'll see where the evidence leads. For now, I'll go with the less damaging based on past evidence and current modeling. I may have to, when I have time, compare the estimates here of La Palma to what was misplaced when Krakatau collapsed.
For general info on Tsunami:
http://www.teachervision.fen.com/tsunami/resource/31103.html
On Sat, Mar 19, 2011 at 11:26 AM,<erikhansen@thebluezone.net> wrote:
I recall a story about the Canary Islands El Hierro and La Palma. EL Heirro had a major landslide that created its crescent shape, this landslide was believed to have caused a huge tsunami that reached the east coast of the US with huge waves.
La Palma has a similar fault line that bisects the island. One theory is that is if this fault goes, half of the island would fall into the sea causing a Tsunami that would be several hundred meters in height as it hits the eastern US. Seems geologists are somewhat split, some think the Island will spilt in half over a long period of time, some think it will happen in one catastrophic event.
The evidence at El Hierro seems to suggest it will happen all at once.
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
-- Jay Eads _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
participants (5)
-
David Rankin -
erikhansen＠thebluezone.net -
Jay Eads -
Joe Bauman -
Kim Hyatt