Vomiting after a Hair ball

My cat had hair ball around 2pm.. 

Then throw up around 8pm 

is norming for their stomach to be  upset after a bad hair ball?

May still be related to hairballs. Did he vomit undigested food? bile? Vomiting undigested or partially digested food hours later is typically a sign of hairball issues still.

You might look at giving him a supplement for hairballs like Vet's best. I use slippery elm syrup.