Most likely it started pumping in anticipation of the launch of hard forks, so a very large number of people began to invest money, which significantly affected the price!
that is not how a pump looks like.
this is simply a small rise of 1-2 % and it is happening purely because of bitcoin price rise of about 10%. and there is some fake hype going around in the altcoin market which is an awesome short term opportunity to pump and dump a lot of shitcoins and make a lot of money in a day or two.