Tsunamis, earthquakes, and seismic detection in India

What did India fear? Apparently not everyone was caught by surprise.

Remember those strange seismic recordings in Korea? Someone thought a nuclear bomb went off.

Well, India also has the same types of detection equipment in order to monitor Pakistan.

Why was India so quiet about a 9.0 richter scale?

If everyone was truly "surprised," should we wonder whether nuclear detonations will be missed?

How many intelligence centers monitoring nuclear events said nothing about the 9.0 earthquake?