I have been commenting on earthquakes related posts in Sajha since I joined Sajha. Same question has been posted several times and I still don't feel bad to post my comment. But my sincere request to the users who wanst to write or know more on this issue, please go through some of the posts in Sajha related with earthquakes.
There is no doubt that Kathmandu is prone to great earthquake hazard. Why?
1. Whole Himalayan belt is very active and prone to earthquake due to tectonic movements of Indian plate.
2. There is huge energy buildup due to long period seismic gap in central Nepal.
3. In comparison to other parts of Nepal, Kathmandu which supports largest numbers of buildings and population has higher earthquake risk due to presence of unconsolidated sediment layers below the surface.
4 Every building higher than two stories and not constructed using earthquake engineering technique will turn into rubble if Kathmandu gets earthquake of magnitude higher than seve richter scale. So we can easily imagine the scale of loss of life and property and its aftereffects if an earthquake of higher than seven richter scale hits Kathmandu.
5. For dimag kharab soon in term of geological time scale is very long duration in term of daily life. The pattern of earthquake occurrence, its magnitude along the time is known as recurrence interval. Smaller scale earthquakes have short recurrence interval and large scale earthquakes have long recurrence interval. As we know India is shifting towards China with rate of 4 cm per year, it should be balanced by release of certain amount of energy through earthquake. It has been observed that there is no big earthquake in central Nepal for long time which means more energy is being stored and the magnitude of upcoming earthquake will be even bigger. It has been predicted that there will be earthquake of magnitude greater than eight richter scale within ten years but we don't know for sure. But one thing is sure if it doesn't happen with in ten years then next one will be even bigger than the predicted one.
I feel pity on our politicians, planners and general people who have attitude of not listening to the expert of any subject or area. It seems nobody wants to pay attention or realize the effects of the predicted earthquake until it occurs. But when it occurs, it will not give time to understand or prepare for anything!