Traditionally arid Pakistan is often subjected to sandstorms.
Much of the country lies in the sand and rocky semi-deserts, which are easy to give rise to such events.
Ironically, this dust storm was in eastern countries (along the banks of the Indus), still suffering from the summer floods, triggered by a very active Indian monsoon in 2010.
One day after the dust storm occurred on the border between Iran, Afghanistan and Pakistan, a massive cloud of dust has shifted to the south.
December 5, 2010, it was seen Aqua satellite over the Arabian Sea.