Video: Iceland anxiously watches volcanic activity

  1. Closed captioning of: Iceland anxiously watches volcanic activity

    >> coverage at london heathrow tonight . thanks. then there are the people who are living in the shadow of this massive cloud of volcanic ash . our own chris jansing made her way to iceland and has more on the fallout there. you were able to get there by flying in behind the winds from the west where the incoming air is clear .

    >> reporter: that's exactly right. there have been no air disruptions here because the two airports in iceland are to the west. that plume of ash is moving east. there is a lot of concern. that's because if history is a guide, the eruption of another far more powerful volcano could be next. on his remote farm in southwest iceland , this man was taking care of two newly-born lambs when he heard a terrifying sound.

    >> i heard this unbelievably sound, really deep roaring sound. it was just like the concord was crashing here.

    >> reporter: the lava bursting through a 650-foot thick glacier sending huge chunks of ice barrelling down the mountain. volcanologists say it may still continue. just yesterday this area was flooded. you can see the water has receded. there is concern it could flood again. clouds have lifted, too, so you can see the volcanic plume. those dark gray areas, that's what holds the volcanic ash . it's feeding the massive volcanic ash engulfing much of europe .

    >> we don't see an end to this weather pattern. until we get a cutting off of ash and smoke, this problem is going to exist for a while.

    >> reporter: the last three times it erupted, it triggers a reaction eight miles away . the katla val cano. what are chances katla could be next?

    >> if record goes, it will be bigger than this one.

    >> reporter: that would be huge.

    >> extremely huge.

    >> reporter: we've been watching these brilliant lightning strikes inside that volcanic plume. not a good sign. it means the amount of the ash and highly- charged particles inside is intensifying.

    >> with everybody wondering what's going on with our planet these days, let's hope history does not repeat itself where you are. chris jansing in iceland for us. chris , thanks for that.

    >>> after a break here, more

msnbc.com news services
updated 4/16/2010 7:37:35 PM ET 2010-04-16T23:37:35

Europeans should try to stay indoors if ash from Iceland's volcano starts settling, the World Health Organization warned Friday as small amounts fell in Iceland, Scotland and Norway.

WHO spokesman Daniel Epstein said the microscopic ash is potentially dangerous for people when it starts to reach the Earth because inhaled particles can enter the lungs and cause respiratory problems.

"We're very concerned about it," Epstein said. "These particles when inhaled can reach the peripheral regions of ... the lungs and can cause problems — especially for people with asthma or respiratory problems." He also said Europeans who go outside might want to consider wearing a mask.

Other experts, however, weren't convinced the volcanic ash would have a major effect on peoples' health and said WHO's warnings were "hysterical." They said volcanic ash was much less dangerous than cigarette smoke or pollution.

Volcanic ash is made of fine particles of fragmented volcanic rock. It is light gray to black and can be as fine as talcum powder. During a volcanic eruption, the ash can be breathed deep into the lungs and cause irritation even in healthy people. But once it falls from a greater distance — like from the cloud currently hovering above Europe — its health effects are often minimal, experts say.

‘Not all particles are created equal’
The Icelandic volcano that erupted Wednesday has sent an enormous cloud of microscopic basalt ash particles across northern Europe, grounding aircraft across the continent. It is drifting above 20,000 feet (6,000 meters), high and invisible from the ground.

"Not all particles are created equal," said Ken Donaldson, a professor of respiratory toxicology at the University of Edinburgh, who has studied the impact of volcanic ash in people. "In the great scheme of things, volcanic ash is not all that harmful."

Donaldson said most Europeans' exposure to volcanic ash would be negligible and that only those in the near vicinity of the Icelandic volcano would likely be at risk.

"Once the volcanic particles are in the stratosphere, they're getting massively diluted because there's a lot of air and other particles blowing around," he said.

He said after previous volcanic eruptions, little impact has been seen in people's health, except for those with lung problems who were close to the volcano.

Dr. Stephen Spiro, a professor of respiratory medicine and deputy chair of the British Lung Foundation, said the further the particles travel, they more diluted and less dangerous they will be. "The cloud has already passed over northern Scotland and we haven't heard of any ill effects there," he said. Spiro said to wear masks or stay indoors to avoid volcanic ash was "over the top" and "a bit hysterical."

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Video: Understanding volcanoes "If this was really coming down, you'd see a yellow (tinge) in the air from the sulphur," he said. "But we've seen no sign of that."

Britain's Health Protection Agency said the concentration of volcanic particles that might settle on the ground was likely to be low and should not cause serious harm. The agency said people with respiratory problems like bronchitis and asthma might experience more symptoms like itchy eyes, a sore throat and dry cough. It advised those people to carry their inhalers or medicines with them and said any health effects were likely to be short-term.

Experts said the irritants in volcanic ash were likely to be very diluted by the winds by the time they hit continental Europe, and that any rainfall would also lessen their effects.

"People with health problems shouldn't sit around outside looking up at this cloud because there could be microscopic particles falling down," said Dr. Pascal Imperato, dean of the public health school at the State University of New York Downstate Medical Center, who worked on the response to the eruption of Mount St. Helens in 1980. "But for most people, they will not experience any major breathing or other difficulties."

The Associated Press and Reuters contributed to this report

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