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Pressure in Mount Fuji is now higher than last eruption, warn experts

 
Anonymous Coward
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09/06/2012 10:34 AM
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Pressure in Mount Fuji is now higher than last eruption, warn experts
Pressure in Mount Fuji is now higher than last eruption, warn experts


:mountFujisep6:



The pressure in Mount Fuji's magma chamber is now higher than it was in 1707, the last time the nearly 4,000-metre-high Japanese volcano erupted, causing volcanologists to speculate that a disaster is imminent.

The new readings, taken by the National Research Institute for Earth Science and Disaster Prevention, reveal that the pressure is at 1.6 megapascals, nearly 16 times the 0.1 megapascals it takes to trigger an eruption.

This, lead volcanologist on the case Eisuke Fujita told Kyodo News, is "not a small figure".

Researchers have speculated for some time that the volcano, located on Honshu Island 100km southwest of Tokyo, is overdue an eruption. In 2000 and 2001 a series of low-frequency earthquakes were recorded beneath the volcano, leading to widespread predictions of an imminent blow....


ReadMore:
[link to www.wired.co.uk]
Anonymous Coward (OP)
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09/06/2012 10:35 AM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
another Article:


Mount Fuji 'under more pressure than last eruption'

Tectonic shifts triggered by last year's huge 9.0 magnitude undersea quake have left the chamber under 16 times the minimum pressure at which an eruption can occur, researchers said. Researchers at the National Research Institute for Earth Science and Disaster Prevention studied the tectonic movements caused by the tsunami-triggering quake on March 11, 2011 and a magnitude 6.4 quake that rocked central Japan four days later, Kyodo News reported. They estimated that 1.6 megapascals of pressure, equivalent to atmospheric pressure of some 15.8 kilograms per square centimetre (226 pounds per square inch), was being exerted on the magma chamber.

Read more at: [link to phys.org]
minkey53

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09/06/2012 10:37 AM

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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
So in 1707, was it a big one, like a doom explosion.

If not, nothing to see here folks


banana2
Anonymous Coward
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09/06/2012 10:38 AM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
Maybe I'm missing something...but how would they have measured this in 1707, much less have a record of it that survived this long?
Anonymous Coward (OP)
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09/06/2012 10:39 AM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
From Global Volcanism Program


The conical form of Fuji-san, Japan's highest and most noted volcano, belies its complex origin. The modern postglacial stratovolcano is constructed above a group of overlapping volcanoes, remnants of which form irregularities on Fuji's profile. Growth of the Younger Fuji volcano began with a period of voluminous lava flows from 11,000 to 8000 years before present (BP), accounting for four-fifths of the volume of the Younger Fuji volcano. Minor explosive eruptions dominated activity from 8000 to 4500 BP, with another period of major lava flows occurring from 4500 to 3000 BP. Subsequently, intermittent major explosive eruptions occurred, with subordinate lava flows and small pyroclastic flows. Summit eruptions dominated from 3000 to 2000 BP, after which flank vents were active. The extensive basaltic lava flows from the summit and some of the more than 100 flank cones and vents blocked drainages against the Tertiary Misaka Mountains on the north side of the volcano, forming the Fuji Five Lakes, popular resort destinations. The last confirmed eruption of this dominantly basaltic volcano in 1707 was Fuji's largest during historical time. It deposited ash on Edo (Tokyo) and formed a large new crater on the east flank.
[link to www.volcano.si.edu]



Historic eruptions of Mount Fuji
[link to en.wikipedia.org]



Mt Fuji volcano (Info,quakes,webcams)
[link to www.volcanodiscovery.com]
Anonymous Coward
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09/06/2012 10:40 AM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
Maybe I'm missing something...but how would they have measured this in 1707, much less have a record of it that survived this long?
 Quoting: Anonymous Coward 22477383


Thats what I was thinking...
Ziggy
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09/06/2012 10:52 AM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
[link to www.tipsofallsorts.com]

The earthquake measuring device in the link was made by the Chinese in 132AD. I have actually seen one of these work in San Fansisco, CA it worked at a 1.0 EQ I think that is pretty good for those dumb Chinese people in 132AD........
Ziggy
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09/06/2012 11:01 AM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
Maybe I'm missing something...but how would they have measured this in 1707, much less have a record of it that survived this long?
 Quoting: Anonymous Coward 22477383


[link to www.ancientchinalife.com]

So here you go this is an EQ measuring device from 132AD. It piced up a quake in 135AD 600 miles away. Those dumb Chinese people that dare challange our electronice from 132AD. Think about it!

eq
Anonymous Coward
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09/06/2012 11:22 AM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
Maybe I'm missing something...but how would they have measured this in 1707, much less have a record of it that survived this long?
 Quoting: Anonymous Coward 22477383



They measured it from space I think
Anonymous Coward
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09/06/2012 11:37 AM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
IWTB - Looks like we have lot of dormant volacanos suddenly becoming active. Have you researched on this ? any reasons?
Anonymous Coward
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09/06/2012 11:39 AM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
Is this a super volcano?
the mighty Atom

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09/06/2012 11:50 AM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
We just give him a Diaper like we done
with Fuko-Boy, oh my God that was
soooooooooo smelly!

I would not be surprised to see him
belching.
G.Y.!B.E.
Anonymous Coward
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Iceland
09/06/2012 12:01 PM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
IWTB - Looks like we have lot of dormant volacanos suddenly becoming active. Have you researched on this ? any reasons?
 Quoting: Anonymous Coward 23289065


crustal earth displacmemt, the mother of ALL DOOM.....
anabel

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09/06/2012 12:07 PM

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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
not good. just like all the other things going on geologically lately.
howdy
In-Situ

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09/06/2012 12:09 PM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
How big was the last blow off?
In-Situ
Anonymous Coward
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09/06/2012 12:10 PM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
My biggest fear is that Mt Fuji might erupt sideways like Mt St Helens did.

If it erupted sideways towards Tokyo (100 kms away), and the volcano caused a very large pyroclastic flow towards Tokyo it would be a massive disaster.



I hope it doesn't happen because the death toll would be huge.
Anonymous Coward
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09/06/2012 12:10 PM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
scared


Not good for Japan. They just can't catch a break!
Although, they did invade my people's land, murdered my mother's biological family, and cause my mother to live 4 years in a Korean orphanage.
THE INQUISADOR
265CDV

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09/06/2012 12:19 PM

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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
another Article:


Mount Fuji 'under more pressure than last eruption'

Tectonic shifts triggered by last year's huge 9.0 magnitude undersea quake have left the chamber under 16 times the minimum pressure at which an eruption can occur, researchers said. Researchers at the National Research Institute for Earth Science and Disaster Prevention studied the tectonic movements caused by the tsunami-triggering quake on March 11, 2011 and a magnitude 6.4 quake that rocked central Japan four days later, Kyodo News reported. They estimated that 1.6 megapascals of pressure, equivalent to atmospheric pressure of some 15.8 kilograms per square centimetre (226 pounds per square inch), was being exerted on the magma chamber.

Read more at: [link to phys.org]
 Quoting: IwantToBelieve76


Good find..Maybe a "Release of back pressure"
is needed for a "HAPPY ENDING" for this potential Doom. But really.. A Multi megaton explosion of Fuji would be disastrous to the surrounding area. What used to be farmland is now industrial areas.
THE INQUISIDOR
Anonymous Coward
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09/06/2012 12:30 PM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
[link to en.wikipedia.org]

The Hoei Eruption of Mount Fuji started on December 16, 1707 (23rd day of the 11th month of the year Hoei 4) and ended about January 1, 1708 (9th day of the 12th month of the year Hoei4) during the Edo period.

Although it brought no lava flow, the Hoei eruption released some 800 million cubic meters of volcanic ash, which spread over vast areas around the volcano, even reaching Edo almost 100 km away. Cinders and ash fell like rain in Izu, Kai, Sagami, and Musashi provinces. In Edo, the volcanic ash was several centimetres thick.

The eruption occurred on Mount Fuji's east–north-east flank and formed three new volcanic vents, named No. 1, No. 2, and No. 3 Hoei vents. The catastrophe developed over the course of several days—an initial earthquake and explosion of cinders and ash was followed some days later with the more forceful ejections of rocks and stones.

Mount Fuji has not erupted since.
 Quoting: wiki
Anonymous Coward
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09/06/2012 12:32 PM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
Mt Fuji erupted every 30 years in the past and it has been 300 years. This could be the BIG ONE.
Anonymous Coward
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09/06/2012 12:42 PM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
Mt Fuji erupted every 30 years in the past and it has been 300 years. This could be the BIG ONE.
 Quoting: Anonymous Coward 9623618


Yes it does look like it will be a big one, especially with those very high pressure measurements !

But, will it happen in our lifetime ? It waited 300 years, who's to say it won't wait another 30 or 40 ?

Basically what we know about volcanoes is exactly how much we now about earthquakes...which is squat !
Anonymous Coward
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09/06/2012 12:46 PM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
Yes a big Mt Fuji eruption "could" be major DOOM
OnTheFence

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09/06/2012 12:49 PM

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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
If the current pressure is 16 times the minimum needed for an eruption to occur ... what is preventing the volcano from erupting? Especially since 16 times is a huge amount of pressure!
Anonymous Coward
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09/06/2012 12:51 PM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
spock
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09/06/2012 12:55 PM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
HAARP
Anonymous Coward
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09/06/2012 12:58 PM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
It'll be great to watch!!

Spectacular!!
banana2
Luisport

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09/06/2012 01:03 PM

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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
Great catch!!! Not so good to Japan... hiding
Resister

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09/06/2012 01:07 PM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
How would they know if the pressure is higher than it was in 1707? Was there even the ability to know that kind of thing back then?
"God forbid we should ever be 20 years without such a rebellion. The people cannot be all, & always, well informed... If they remain quiet under such misconceptions it is a lethargy, the forerunner of death to the public liberty... Let them take arms... What signify a few lives lost in a century or two? The tree of liberty must be refreshed from time to time with the blood of patriots & tyrants. " - Thomas Jefferson in 1787
[link to line-in-the-sand.spam]
MayanGod

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09/06/2012 01:11 PM

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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts
bump
"The face of this entire planet could be rearranged in a matter of days; not thousands or millions of years. If we haven’t learned that by now because of the hardness of the scientific heart; we’re about to."
Floobarb the Argnorf

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09/06/2012 01:14 PM
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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts

The Aluminated One
OnTheFence

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09/06/2012 01:20 PM

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Re: Pressure in Mount Fuji is now higher than last eruption, warn experts

 Quoting: Floobarb the Argnorf


What movie is that from?
Love the special effects. hf

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