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Thursday, March 10, 2011

World to see biggest full moon in two decades

 

World to see biggest full moon in two decades

On 19 March, the full moon will appear unusually large in the night sky
as it reaches a point in its cycle known as 'lunar perigee'.
Stargazers will be treated to a spectacular view when the moon approaches Earth at a distance
 of 221,567 miles in its elliptical orbit - the closest it will have passed to our planet since 1992.
The full moon could appear up to 14% bigger and 30% brighter in the sky,
especially when it rises on the eastern horizon at sunset or is provided with
 the right atmospheric conditions.
This phenomenon has reportedly heightened concerns about 'supermoons' being
 linked to extreme weather events - such as earthquakes, volcanoes and tsunamis.
The last time the moon passed close to the Earth was on 10 January 2005, around the time
of the Indonesian earthquake that measured 9.0 on the Richter scale.
Hurricane Katrina in 2005 was also associated with an unusually large full moon.
Previous supermoons occurred in 1955, 1974 and 1992 -each of these
 years experienced extreme weather events, killing thousands of people.
However, an expert speaking to Yahoo! News today believes that a larger moon
 causing weather chaos is a popular misconception.
Dr Tim O'Brien, a researcher at the Jodrell Bank Centre for Astrophysics at the
 University of Manchester, said: "The dangers are really overplayed.
 You do get a bit higher than average tides than usual along coastlines as a result of the
 moon's gravitational pull, but nothing so significant that will cause a serious climatic
 disaster or anything for people to worry about."
But according to Dr Victor Gostin, a Planetary and Environmental Geoscientist at Adelaide University,
 there may be a link between large-scale earthquakes in places around the equator and new and full moon situations.
He said: "This is because the Earth-tides (analogous to ocean tides) may be the final trigger that sets off the earthquake."
Written by Gaby Leslie


 
 
 
  

 
 

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