The picture shown is at a sulfur quarry within the caldera at Owakudani valley, with active sulphur vents and hot springs
Alert Raised at Japan’s Hakone as Earthquakes ContinueExcerpt:
"After LAST YEAR’S TRAGEDY at Ontake , the Japanese Meteorological Agency is taking no chances in alerting people when a volcano is becoming restless...
...Although the volcano hasn’t erupted since the 1200’s, it has a history prior to that of ash falls and pyroclastic flows, similar to other Japanese volcanoes like Unzen...
...The latest JMA alert is based on new earthquakes recorded at Hakone since April 26th along with deformation of the land’s surface at the volcano. On Tuesday May 6 alone, over 115 earthquakes were recorded. Both of these are signs that magma may be moving under the volcano (although both could also be signs of changes in the hydrothermal system as well). These signs of unrest, at least right now, could be precursors to small, phreatic explosions similar to what happened at Ontake last year—and its this potential that has prompted a ban on hiking within the crater along with a 3-kilometer exclusion zone around the Owakudani Valley...
...An earthquake swarm at Hakone in 2001 didn’t end up leading to any eruption, so this unrest may not lead to any activity."
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link to www.wired.com]
Excerpt from 2011 article about the area:
Hell on earth at the Great Boiling Valley of Owakudani“Welcome to hell.”
It's hardly the most appealing of tourist slogans, but according to official Owakudani sightseeing literature, that’s exactly where I was, even though my map said I was only 100 kilometers out of Tokyo, in Hakone, Kanagawa Prefecture...
...Before the area was called Owakudani, or Great Boiling Valley, it went by another name: O-jigoku, or Great Hell...
...It’s a volcanic area that hisses and boils beneath your feet. Trails of sulfur fumes fill the air, while cracks in the earth release vents of steam to complete the hellish picture....
...Owakudani is a place where it’s possible to catch a sense of the power that lies underground. And of what makes the ground move when the pressure becomes too great.
It’s a place to get insight into the geological soul of the land, and to understand what makes this earthquake-prone country tick...
[
link to travel.cnn.com]
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still in awe of many things