The 1992 eruption saw the town of Zafferana threatened by a lava flow , but successful diversion efforts saved the town with the loss of only one building a few hundred metres outside it . The 1991 â `` 1993 eruption saw the town of Zafferana threatened by a lava flow , but successful diversion efforts saved the town with the loss of only one building a few hundred metres from the town 's margin .