NASA releases images of Pakistan's 'Earthquake Island'
NASA has released before and after photos of a new terrestrial
body that was born on September 24 during a quake that struck
Called Zalzala Jazeera, or a an earthquake island, the terrestrial formation can now be found 380 kilometers from the earthquake’s epicenter in Paddi Zirr Bay near Swadar, Pakistan in the Arabian Sea.
The first image of the island was taken by NASA’s Earth Observing-1 satellite on September 26, while the second snapshot shows the same bay on April 17 with water and no landmass around the coordinates that the new island now inhabits.
According to scientists, the depth of the water level around Zalzala Jazeera stands at about 15 to 20 meters, stretching 75 to 90 meters across. It lies approximately one mile from the shore. Scientists say the island is nothing more than just a pile of mud, sand and solid rock that was caused by the forces of highly pressurized gas.
“The island is really just a big pile of mud from the seafloor
that got pushed up. This area of the world seems to see so many
of these features because the geology is correct for their
formation. You need a shallow, buried layer of pressurized
gas—methane, carbon dioxide, or something else—and
fluids. When that layer becomes disturbed by seismic
waves (like an earthquake), the gases and fluids become buoyant
and rush to the surface, bringing the rock and mud with
them,” Bill Barnhart, a geologist at the US Geological Survey
told NASA’s Earth Observatory.
The Earth Observatory says this is not the first island to have surfaced along the 700-kilometer-long coast over the past century. Scientists predict that the new island will remain above surface for up to a year before sinking back into the Arabian sea.
The island rose out of the water during a 7.7-magnitude earthquake that struck Balochistan, just 69 km north-northeast of Awaran - the nearest Pakistani city - on 24 September 2013. Over 300,000 people were affected by the quake, which caused over 500 deaths, and some 21,000 houses were destroyed.