During the Phantump Catch Mastery Event do same pokestops give new field tasks or just 1 per day as usual?

I was wondering if I have to go to a place with plenty of pokestops for the event or if I can stay in a closer place with less pokestops. It would depend if the pokestops give new research tasks after a certain time or not (similar to the eclosion days where you can get all the eggs from a few pokestops in your area).