The basaltic Auckland volcanic field is a monogenetic volcanic field underlying much of the Auckland metropolitan area. The field's many vents have produced a diverse array of explosion craters, scoria cones, and lava flows. The largest and most recent is Rangitoto, which erupted in the Hauraki Gulf 600-700 years ago. Currently dormant, the field is likely to erupt again within the next hundreds to thousands of years (based on past events), a very short timeframe in geologic terms. Despite this, Auckland's residents face more danger from volcanoes farther south.