NASA scientist Richard B. Stothers , who studied the dates of strong activity between 1500 and 1900 , has disproven the theory that volcanoes are more likely to erupt at certain times of the year . Periodic springtime eruptions of some volcanoes have been associated with melting snow seeping into the ground and reacting with molton lava below the ground, scientists have suggested. Nearly all recorded eruptions south of 50 degrees south latitude occurred between February and April because outsiders who can record eruptions only visit that uninhabited region during its summer . No similar pattern is seen in the far north , where residents are always present . The peak monthly total of eruptions was 32 for February and 36 for both April and May , a statistical variation expected to occur randomly .
NASA scientist Richard B. Stothers , who studied the dates of strong activity between 1500 and 1900 , has disproven the theory that volcanoes are more likely to erupt at certain times of the year . Nearly all recorded eruptions south of 50 degrees south latitude occurred between February and April because outsiders who can record eruptions only visit that uninhabited region during its summer . No similar pattern is seen in the far north , where residents are always present . The peak monthly total of eruptions was 32 for February and 36 for both April and May , a statistical variation expected to occur randomly .