 The alleged activity caused landslides and floodings along Ga-o River which drains Lake Maughan and joins Allah River in the north.Due to this phenomenon, the Philippine Institute of Volcanology and Seismology installed monitoring equipment which established that the so-called activity was man-made.Less than a year after the 1995 activity, a temporary dam was formed at about 250 m from the outlet of Lake Maughan, alarming the residents within the area due to fear of flashfloods.