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I see someone failed their basic geology class.

Look, Mt. Fuji is a stratovolcano. While capable of a highly explosive eruption, it's much more likely to just spit out some lava(Which is very thick, due to the minerals in it), and will do little damage. Lahars wand gases would be more problematic, but, seriously, it wouldn't spread far.

Even if it does go active, it's going to be a "Okay, let's schedule a vacation," not Mt. St. Helens. The earthquakes and the volcanic moneyshot(chunk of rock shot up from the volcano during eruption) are more dangerous.

At most, it'll effect maybe a fifth of Honshu, and that's being quite generous. Sure, some people will have to be relocated, if this is true, but really? Relocating all of Japan? This is Mt. Fuji, not Krakatoa. Look at the extent of what happened to Mt. St. Hellens. That's the worst-case scenario here.

Seriously, do some research before running around in circles screaming. Now, why don't you worry about something more likely, like a stray black hole or gamma ray burst? 

whoah dude thats not Jelly stone....



its Yellowstone and yes, the park is a Super Volcano, its crater is some 35 miles wide or so.

it was on histopry channel jsut the other day.     

Sep 15, 2012 -- 11:13PM, Qmark wrote:

Yellowstone is over a hotspot volcano.  Those things tend to ooze more than kersplode.

Not exactly. The "oozing" as you put it, assuming you mean the geysers and such, is just something that occurs with any large amount of volcanic activity, much like hot springs. If you mean like oozing lava, then you're dead wrong. See, the definition of a supervolcano is based purely on the release, nothing to do with its size(Beyond the basic corrolation between size and ejecta with volcanos).

See also: Hawaii.

Uh, bro? Hawaian volcanos have nothing to do with the Yellowstone volcano or Fuji. See, the Hawaiian volcanos are shield volcanoes. They do nothing but ooze¹(And, on a slightly related note, they, almost by definition, cannot be supervolcanos²). Mt Fuji is a stratovolcano, which either erupts violently or quietly(by exploding and shaking, or by "oozing and releasing gas). Supervolcanos are all, basically by definition, pyroclastic. They go boom. Any other activity is not true supervolcanic activity.
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¹Yes, okay, there are pyroclastic shields. They are also very rare and are not located in hawaii.
²A supervolcano is measured in amount of ejecta released in the eruption. So, while it may be theoretically possible for a shield volcano to release 1000km³ of ejecta, it ain't happening.

Sep 16, 2012 -- 2:27AM, Qmark wrote:

Hotspot (hawaii, yellowstone) and subduction (japan, cascades) volcanoes behave entirely differently.

OTTers (silversword, CJ) and non-OTTers (qmark) behave differently.

Sep 16, 2012 -- 6:08AM, Cyclone_Joker wrote:

Mt. Fuji are stratovolcanos. That means they can go boom, but more frequently they release semi-violent flows and release gas. Mt. Fuji happens to have a lot of basalt. That means its lava is thick. It will drop lava slowly, and it won't get down the mountain.

And Mt Fuji is sitting at over ten times the pressure required for a regular eruption...meaning super eruption - so lets evac Japan now and save lives. Or we can sit back and wait and after people are dead suggest there was nothing we could do but we probably should have done something at the time. In which case everyone who stalled on this can hang for conspiracy to murder.



Given Tasmania could be occupied by up to 50 million people (on an acre per family) - retaining half of the island as national park at a cost of $100,000 per family I suggest we bill Japan now and start building. Its just 1 Trillion dollars (1 thousand billion).