A video that has been circulating in recent days in geological circles on the Internet is said to be the world’s first to record the fracturing of a seismic fault on the surface of the ground. The video was allegedly captured by a security camera during the 7.7-magnitude earthquake that struck Myanmar and Thailand on March 28, killing nearly 5,500 people. It was posted on Facebook by engineer Htin Aung, who said he was at a GP Energy solar park near the town of Taji in Myanmar at the time. The video shows a metal door that opens when the ground starts to shake. A few moments later, at about the 14th second, the earth cracks in the right part of the image and the ground slides backwards. Two seismologists have told Livescience. Com that they haven’t seen any other video of a fault opening up to the surface. “As far as I know, this is the best video we have of a complete surface rupture in a very large earthquake”, said Rick Astor of Colorado State University. The earthquake occurred in the Great Rift that runs through Myanmar from north to south and separates the small tectonic plates of Burma and Sunda, which slide horizontally relative to each other. The epicenter was near the city of Mandalay, north of where the video was filmed. The rift rupture has spread north and south. The tremors recorded at the beginning of the video come from seismic waves that travel through the ground at a speed of several kilometers per second. Fracture fracturing is a slower process that arrives a little later. According to Aster, “the horizontal slip continues from the surface to a depth of 20 or 30 kilometers.