Islamabad , Pakistan ( CNN ) -- An earthquake in Pakistan , powerful enough to prompt the appearance of a small island off the coast , has killed more than 200 people , Pakistani officials said . The 7.7-magnitude quake struck in a remote area of southwestern Pakistan on Tuesday , but it had severe consequences . At least 208 people were killed in the district of Awaran and the city of Turbut in Balochistan province , Asad Gilani , the provincial home secretary , said Wednesday . In addition to the fatalities , around 350 people have been injured , he said , and more people are still trapped in rubble . The quake was strong enough to cause a mass 20 to 30 feet high to emerge from the Arabian Sea like a small mountain island off the coast of Gwadar , local police official Mozzam Jah said . A large number of people gathered to view the newly formed island , he said . Large quakes can cause significant deformation to the earth 's crust , particularly visible along coastlines . The island is about 100 feet in diameter and about one mile off the coast , GEO TV reported . Zahid Rafi , principal seismologist for the National Seismic Monitoring Center , confirmed the island had formed . He said it was `` not surprising , '' considering the magnitude of the earthquake . But John Bellini , a geophysicist with the U.S. Geological Survey , said that generally it would be unlikely for such a large island to emerge from a quake like Tuesday 's . Many things , such as the tide , could come into play regarding the rise of the island , he said . More than 1,000 troops will be sent to the area to provide aid , including rescue teams and medical teams , Maj. Gen. Asim Bajwa said . With a depth of about nine miles ( about 15 kilometers ) , the quake struck 43 miles ( 69 kilometers ) northeast of Awaran and 71 miles ( 114 kilometers ) northwest of Bela , the U.S. Geological Survey said . Some mud-walled homes fell in Awaran , said Latif Kakar , director of the Provincial Disaster Management Authority in Balochistan . The tremors lasted two minutes . People flocked out onto the streets of Quetta , the provincial capital . Aftershocks could be felt in Karachi , hundreds of miles to the southeast . CNN 's Mari Ramos and Elizabeth Joseph , and journalist Sophia Saifi contributed to this report .
NEW : The death toll rises to about 350 ; 208 injured . The quake is powerful enough to create a small island off the coast , officials say . The earthquake struck a remote area , Pakistani officials say . Aftershocks are felt in Turbut , 69 kilometers to the southeast .