Three volcanoes have been found in southeast Australia's Newer Volcanic Province by researchers using satellite images and topography models from NASA. The largest of the volcanoes is about 0.6 miles, or about 1 kilometer, wide and about 300,000 years old. The other two are about 2 million and 4 million years old. "Finding undiscovered volcanoes is really important for calculations of eruption frequency, which is the active time of the volcanic field divided by the number of volcanoes," said Monash University's Julie Boyce, the lead researcher.

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