Difficult decision. I suppose it would depend on which time next year? I would feel more comfortable about going later rather than earlier as it gives you a chance to see if the aftershocks quieten down.

If I decided to go I would also make sure I had some very good travel insurance that allowed me to cancel if another major earthquake happened before you go there, or if it happened while you were there, any extra costs that you incurred (health wise or special travel to get out of there) you were reimbursed for.