Before and after images show Tianjin blast’s

The explosion, which originated in a shipping container at a company that stores chemicals, was felt up to six miles away and was registered at a U.S. Geological Survey seismometer station in Beijing, as it leveled warehouses and blew out windows in neighboring apartment complexes.

China Earthquake Networks Centre, on Weibo, said the second and bigger blast was comparable to an explosion of 21 tons of TNT.

Google and Skybox Imagery, its subsidiary that provides high-resolution satellite imagery, released two images taken from space on Thursday that shows the extent of the blast’s aftermath. The after image shows the leveled warehouse and plume of black smoke that continues to hang over Tianjin.