Are frequent tremors in U'khand hills indicative of big quake? 'Yes', says top disaster official

The hills of Uttarakhand are hit frequently by mild earthquakes -- as many as 51 since January 1, 2015 -- which are often dismissed as "usual occurrences". But are these tremors indicative of a big earthquake in future?
"But definitely the damage will be more in the thickly populated urban areas where there has been rapid and unplanned growth of population and infrastructure."
"Hence, it is important to assess the vulnerability of built environment before undertaking any seismic-risk reduction exercise."
Safety of school buildings is also critical, he said. "The collapse of school buildings would disrupt relief work as they are often used as shelters, makeshift dispensaries and stores for relief supplies in the aftermath of any disaster."