The main reason for the earthquakes in India is the tectonic movement. The Indian plate is continuously hitting at Asia plate at a rate of approximately 47 mm/year (anticlockwise).
The city of Allahabad was originally known as Prayag in ancient times. The Union Home Ministry has approved the proposal of the Uttar Pradesh Government to rename Allahabad as Prayagraj. Akbar’s grandson Shah Jahan renamed the entire city as Allahabad.