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Volcano's lake turns from blue to red - Mt. Manaro on Vanuatu
AP on Yahoo ^ | 5/29/06 | Ray Lilley - ap

Posted on 05/29/2006 9:25:06 AM PDT by NormsRevenge

WELLINGTON, New Zealand - A lake atop a rumbling volcano on the South Pacific island of Ambae has changed color from blue to bright red, puzzling scientists.

Mount Manaro, one of four active volcanos on the island nation of Vanuatu, has been showing signs of erupting for only the second time in 122 years.

"We are still ... trying to understand this change of color in the lake from blue to red," Geology and Mines Department director Esline Garae said by telephone Monday from Vanuatu's capital, Port Vila.

She said two scientists on Ambae Island were monitoring Lake Vui as well as seismic activity on the 5,000-foot Mount Manaro.

If the change of color "comes from new activity in the ground or just chemical change in the lake — these are two things I want to know from those guys before I can say anything" about the danger posed by the volcano, she said.

Mount Manaro last erupted in November 2005, forcing half the island's 10,000 inhabitants to evacuate their villages. An 1884 eruption killed scores of villagers.

New Zealand volcanologist Brad Scott said Lake Vui's color was "quite a spectacular red," but what had caused it "is the $64,000-question."

He said water samples from the lake would help determine what was happening in the crater and below it.

The color change could be a chemical process or gas from molten volcanic rock or something else coming into the lake, he said.

Three other volcanos in Vanuatu — Lopevi, Yasur and a two-crater volcano on Ambryn Island called Marum and Benbow — have spewed rocks, ash, smoke and steam in recent weeks.

Vanuatu, formerly the New Hebrides Islands, is made up of 13 main islands located about 1,400 miles east of Australia.


TOPICS: Culture/Society; News/Current Events
KEYWORDS: artbell; globalwarming; mountmanaro; ringoffire; vanuatu; volcano
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An aerial view shows lava spewing at the top of the 2,361 metre (7,746 ft) Mt. Karthala near Moroni, the capital of the Comoros Island, May 29, 2006. Lava bubbled from a volcano in the Comoros on Monday, frightening thousands on the Indian Ocean archipelago's largest island who feared a full-blown eruption as they waited to see where the molten rock might flow. REUTERS/Peter Paxton


1 posted on 05/29/2006 9:25:08 AM PDT by NormsRevenge
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To: NormsRevenge

Is it me or are the volcanoes in that area of the world becomming more active than normal??


2 posted on 05/29/2006 9:28:23 AM PDT by technomage (NEVER underestimate the depths to which liberals will stoop for power.)
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To: technomage

It's the 24 7 news cycle . ;-)

This is a living planet, after all.


3 posted on 05/29/2006 9:30:39 AM PDT by NormsRevenge (Semper Fi - "The Road to Peace in the Middle East runs thru Damascus.")
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Comment #4 Removed by Moderator

To: NormsRevenge

Sure a lot of volcanoes going off right now.


5 posted on 05/29/2006 9:35:26 AM PDT by Mike Darancette (Proud soldier in the American Army of Occupation..)
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To: technomage

It is caused by SUVs and carbon emissions.


6 posted on 05/29/2006 9:36:17 AM PDT by BenLurkin
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To: Mike Darancette

Yeah, but there always is. Very active planet.


7 posted on 05/29/2006 9:37:43 AM PDT by SuzyQue
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To: BenLurkin
Bush's fault.
8 posted on 05/29/2006 9:38:28 AM PDT by Bratch
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To: F15Eagle
Mount St. Helens has been pushing a 30-story rock into the air, they said at 5-6 feet per day, which is amazing. The photo was pretty wild.

Wouldn't happen to have a link for that, would you?

9 posted on 05/29/2006 9:41:32 AM PDT by ItsForTheChildren
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Comment #10 Removed by Moderator

To: technomage

Run a search on "Ring of Fire+Plate Tectonics."

With Volcanoes and real estate, it's all about Location, Location, Location

Lots of good stuff, very little garbage, and your questions will be answered.


11 posted on 05/29/2006 9:44:48 AM PDT by capt.P (Hold Fast! Strong Hand Uppermost!)
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To: ItsForTheChildren

12 posted on 05/29/2006 9:47:26 AM PDT by Nexus
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To: NormsRevenge

So does this mean Vanuatu is going to go GOP in November?


13 posted on 05/29/2006 9:49:02 AM PDT by dfwgator (Florida Gators - 2006 NCAA Men's Basketball Champions)
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Comment #14 Removed by Moderator

To: NormsRevenge

Phenolphthalein?


15 posted on 05/29/2006 9:49:56 AM PDT by null and void (The way to whip an enemy is to get 'em skeered, and then keep the skeer on 'em...)
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Comment #16 Removed by Moderator

To: capt.P

Thankfully most of West Coast of the USA is not in a subduction zone.


17 posted on 05/29/2006 9:51:51 AM PDT by Mike Darancette (Proud soldier in the American Army of Occupation..)
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Comment #18 Removed by Moderator

To: F15Eagle; Nexus
WOW! Amazing pics. Thanks for digging them out.
19 posted on 05/29/2006 10:01:09 AM PDT by ItsForTheChildren
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To: Bratch
No No No... It's manbearpigs revenge!!! He's out to destroy all mankind!


I'm totally cerial!

20 posted on 05/29/2006 10:03:14 AM PDT by rawcatslyentist (I'd rather be carrying a shotgun with Dick, than riding shotgun with a Kennedyl!)
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Comment #21 Removed by Moderator

To: Mike Darancette
Thankfully most of West Coast of the USA is not in a subduction zone.

The subduction zone is further east, in the Idaho/Nevada corridor (the Great Basin region). Like around where Reno is. Some of the massive basalt flows in that region are only maybe a thousand years old, and they fully expect the ground to split open and lava to come pouring out in this region again within the next thousand years. The mountain west, particularly in Idaho/Nevada, is littered with active volcanic features like sulfur and steam vents. If you wander the mountains out there, you run across them all the time.

Nevada has some of the thinnest crust found on the continents, hence why much of the ground water is heated. Unlike further west, you do not really get volcanoes. Instead, you get massive cracks in the earth where lava pours out and thousands of cinder cones.

22 posted on 05/29/2006 10:11:50 AM PDT by tortoise
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To: NormsRevenge
Red Dye # 2.
23 posted on 05/29/2006 10:12:02 AM PDT by Alas Babylon!
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To: technomage

It's not you. Check out this link - and you can see where the "ring of fire" is located. It's all the countries which border the Pacific Ocean (from the west coast of America - Alaska - Australia, etc.:

USGS Earthquakes:

http://earthquake.usgs.gov/eqcenter/recenteqsww/

The USGS may also have links for volcanos - I just don't happen to have them.


24 posted on 05/29/2006 10:12:05 AM PDT by The Final Harvest (Drive-by Media: Fake news, fake documents, fake polls)
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To: NormsRevenge
Volcano's lake turns from blue to red

Stop throwing the native virgin girls in it.

25 posted on 05/29/2006 10:13:26 AM PDT by xJones
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Comment #26 Removed by Moderator

To: F15Eagle
The forces behind that are tremendous.

Ah, you recognize correctly.

Yet it falls to us to Saaaaaave the Plaaaaanet!! You see, it's being destroyed by SUV's!!

/s

27 posted on 05/29/2006 10:23:16 AM PDT by Ole Okie
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Comment #28 Removed by Moderator

To: F15Eagle

Makes me wonder how fast a mountain could grow....interesting.


29 posted on 05/29/2006 10:39:21 AM PDT by ThisLittleLightofMine
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To: tortoise
Unlike further west, you do not really get volcanoes. Instead, you get massive cracks in the earth where lava pours out and thousands of cinder cones.

I thought that the Great Basin was an area of thin crust and spreading (Reno and Salt Lake City are moving apart) with cracks appearing as the crust is segmented. It is said that someday the Great Basin might become a sea interspersed with Islands as the ocean encroaches from the Gulf of California.

The true subduction zones are off the Coasts of Oregon, Washington and the Aleutian Islands happily feeding magma to the Cascade and Aleutian Volcanoes.

30 posted on 05/29/2006 10:42:58 AM PDT by Mike Darancette (Proud soldier in the American Army of Occupation..)
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To: tortoise
The subduction zone is further east, in the Idaho/Nevada corridor (the Great Basin region). Like around where Reno is.

It doesn't work that way. That would be in the middle of the North American Plate. The geological features you are talking about are not caused by subduction.

31 posted on 05/29/2006 10:44:01 AM PDT by burzum (Great minds discuss ideas, average minds discuss events, small minds discuss people.--Adm. Rickover)
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To: Ole Okie

The forces behind that are tremendous.
Ah, you recognize correctly.

And consequently if it's all George Bush's fault,
the power of the Rove must be stupendous!!


32 posted on 05/29/2006 10:48:56 AM PDT by tet68 ( " We would not die in that man's company, that fears his fellowship to die with us...." Henry V.)
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Comment #33 Removed by Moderator

To: NormsRevenge

34 posted on 05/29/2006 11:17:14 AM PDT by N3WBI3 ("I can kill you with my brain" - River Tam)
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To: technomage

There's been no increase in volcanic activity around the world, nor is there any increase in earthquake activity (the number of large earthquakes worldwide is running below the 100-year average for what I believe is now the 6th or 7th year in a row.)

Tthere's just something called the internet where obscure news from around the world is more avaliable and a place called FR where such reports are easily avaliable in one place, accompanied by more interest in things geological since the 2004 tsunami.

Go take a look at a site like the Smithsonian Volcanism program http://www.volcano.si.edu/ and just surf around the world looking at the eruptive record of volcanoes - you'll find infinite numbers of eruptions from just, say, the 70s and 80s you never heard a thing about at the time, some quite large.

And your question is answered directly here:

http://www.volcano.si.edu/faq/index.cfm?faq=06

And if you examine a listing of all known Volcano Explosivity Index 4 or higher eruptions (all of those about 1/10th the size of Mt. St. Helens in 1980 or larger - good size eruptions) in the last 12,000 years, you'll see no increase in those and in fact a real absence of them recently. In the last 4 years there MAY be only one (Manam in New Guinea in 2005) an eruption that likely needs more study to assess its size.


35 posted on 05/29/2006 11:25:32 AM PDT by Strategerist
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To: burzum; Mike Darancette
That would be in the middle of the North American Plate. The geological features you are talking about are not caused by subduction.

Guh, you are correct. The Great Basin is a rift zone just east of the subduction zone.

My confusion is that I have read some geology articles that speculate on relationships between those formations. The coastal mountains of California are from the subduction zone, the Sierra Nevada are probably an artifact of the rift formation.

The Great Basin may become a sea one day, but it will have to lose almost a mile of elevation. Or get very wet.

36 posted on 05/29/2006 11:31:14 AM PDT by tortoise
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To: tortoise

Well at one time (tens of millions of years ago) there is some theorizing among geologists that the Farallon plate subducted below north America, but didn't dive into the Mantle, and instead slid along horizontally for hundreds of miles just under the North American plate, contributing to the creation of the Rockies some distance inland like someone pushing a rug along so it bunches up.


37 posted on 05/29/2006 11:33:17 AM PDT by Strategerist
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To: F15Eagle

That story was in a weekly reader from the 50's or 60's I read years ago.


38 posted on 05/29/2006 12:11:42 PM PDT by jeremiah (How much did we get for that rope?)
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To: burzum; tortoise
The geological features you are talking about are not caused by subduction.

There is no subduction East of the Sierra crest (which forms the Western boundary of the Great Basin) rather the Pacific and North American Plates pass each other in a right-lateral fault (San Andreas) with the Pacific Plate moving generally in a NW direction. This is not the type of plate boundary known for volcanism but can spawn great earthquakes.

The Owens Valley East of the Sierra crest is sinking and filling with sediment while periodic great quakes (See Lone Pine 1872 earthquake) thrust the Sierra Crest upward. As throughout the Basin and Range the ranges bracketing the basin (Owens Valley) have have faults running parallel to their bases.

39 posted on 05/29/2006 12:20:02 PM PDT by Mike Darancette (Proud soldier in the American Army of Occupation..)
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To: NormsRevenge
A lake atop a rumbling volcano on the South Pacific island of Ambae has changed color from blue to bright red, puzzling scientists

Is it me or does a lake that sits atop boiling, red hot lava turning from blue to red really not seem that puzzling?

Are these the same scientists that are stunned by research that everyone acknowledges as stipulated fact (i.e., "Research shows that 9 of 10 hetero men like boobies")?

Seriesly.

40 posted on 05/29/2006 12:27:42 PM PDT by mattdono (Alaska. Gulf. Drill.)
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41 posted on 05/29/2006 1:22:15 PM PDT by NormsRevenge (Semper Fi - "The Road to Peace in the Middle East runs thru Damascus.")
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To: tortoise

Yep. Great Salt Lake's surface is approx. 4200 ft. above sea level. My front porch is something like 4500 ft. above sea level. It'd have to lose a lot to get ocean wet.


42 posted on 05/29/2006 1:27:44 PM PDT by Knitting A Conundrum (Act Justly, Love Mercy, and Walk Humbly With God Micah 6:8)
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Comment #43 Removed by Moderator

Comment #44 Removed by Moderator

To: NormsRevenge

Rut roh...


45 posted on 05/29/2006 1:46:18 PM PDT by mewzilla (Property must be secured or liberty cannot exist. John Adams)
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To: mewzilla

Is the color due to cyanobacteria, and if so does the color change denote a temperature change, anyone know?


46 posted on 05/29/2006 1:49:06 PM PDT by mewzilla (Property must be secured or liberty cannot exist. John Adams)
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To: mewzilla

I thought the color change to red was due to iron oxide. I may be wrong.


47 posted on 05/29/2006 1:51:52 PM PDT by Hillarys Gate Cult (The man who said "there's no such thing as a stupid question" has never talked to Helen Thomas.)
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To: Hillarys Gate Cult

On my last visit to Yellowstone, some of the park rangers were talking about the colors of the thermal pools, mud pots etc. being due to bacteria as well as the mineral content. I just wondered if this might be due to something similar :)


48 posted on 05/29/2006 1:58:02 PM PDT by mewzilla (Property must be secured or liberty cannot exist. John Adams)
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To: F15Eagle
Incredible! To just be standing there when something like that happened! A lucky man... in more ways than one.

Found a few pics from the mid- to late-40s and a slide show depicting the evolution of its lava flows. The eruption continued into 1952.

49 posted on 05/29/2006 2:24:39 PM PDT by ItsForTheChildren
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To: F15Eagle
One guy I saw on TV, was in one when it went up. A ledge with several of his teammates just collapsed into the volcano. Holy cow.

Wow! Was the mountain appeased?

I'm kidding. The obvious power of a volcano would warn me that nature isn't something to be trifled with.

Thanks for the story.

50 posted on 05/29/2006 2:53:27 PM PDT by Ole Okie
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