Sandstorm
Mobile phone videos of a sandstorm in Guazhou County in northwest China's Gansu Province on Friday showed its intensity. The entire county was enveloped by the storm in less than 10 minutes. The storm brought strong gales with speed of more than 75 kilometers per hour and dropped visibility to less than 600 meters. As the storm moved fast and was quickly over, it did not cause much damage to local industries or agriculture.