Evacuation alerts issued as experts warn the category five cyclone could be the most powerful storm ever to hit the island nation

(Reuters) - A 7.0 magnitude earthquake struck off the Pacific island of Vanuatu on Friday, the U.S. Geological Survey said.

Vanuatu’s weather patterns are changing as the planet warms up, undermining the island nation’s ability to feed itself, according to Shirley Laban, Oxfam’s climate change manager for the country.

A 6.1 magnitude earthquake struck 19 miles (30 km) east-northeast of Port Vila, capital of the Pacific island nation of Vanuatu, the United States Geological Survey said on Tuesday.

An undersea earthquake measuring 6.0 magnitude, and only 10 km deep, struck off the coast of Port Vila, the capital of Vanuatu in the South Pacific, on Thursday, the U.S.

The changes will result from the South Pacific rain band responding to greenhouse warming.

A 6.5-magnitude earthquake hit off the coast of the South Pacific island of Vanuatu on Sunday, the Hong Kong Observatory said, but there were no reports of a tsunami warning.

The quake struck at 2210 IST around 81 kilometres southwest of the capital Port Vila. The shallow quake, which had a depth of four kilometres, was measured by the US Geological Survey as having a magnitude of 6 on the Richter scale.

IN the recently published 2011 Global Assessment Report by the UNDP, Bangladesh was found to be one of the countries 'most vulnerable' to disasters.

The three-day Commonwealth Heads of Government Meeting (CHOGM) 2011 ended Sunday endorsing the importance of taking urgent action on climate change and global food crisis.

A leading disaster watchdog has ranked Bangladesh as the world's sixth "high disaster risk country" in terms of its exposure to typhoons, earthquake and tsunamis.