The Geminid meteor shower is caused by the meteor 3200 Phaeton. The Geminid meteor shower and the Quadrantids meteor shower are the only major showers not caused by a comet but by a meteor and its trails.
Geminid showers have been active since Dec 4 but they will reach their peak on Thursday, Dec 14. The peak of a meteor shower is when during the entire period, one can spot the meteors most distinctively.
Since the radiant rises in mid-evening, you can watch for Geminids from late night to dawn around the peak dates of December 13 and 14. The radiant will be the highest around 2:00 am UTC.
Yes, Geminids can be seen from India on Thursday. When viewed from New Delhi, the meteor shower will begin to make an appearance around 6:53 pm IST on Thursday, Dec 14. They will be visible till dawn break around 6:36 am the next day.
The Geminids are the most active of all the meteor showers Earth encounters every year. They can produce as many as 150 meteors per hour, according to the American Meteor Society.