Answers
Natural earthquakes generally occur due to two major reasons: volcanic activities and tectonic shifts. Nepal does not have any volcanoes, but it lies just above the fault line of tectonic plates that cause recurring earthquakes, making earthquake safety a key concern of the country.
Causes:
The mountains were created over a fault where the large tectonic plates of India and Eurasia collide. But the same fault that holds the piercing summits of the Himalayas produces large earthquakes that can cause immense loss of life in the densely populated plains of northern India and southern Nepal.