Ring of Fire was due. In 2000, the ERLAWS system was installed on the mountain to detect such a collapse and alert the relevant authorities. The Auckland volcanic field on the North Island of New Zealand has produced a diverse array of explosive craters, scoria cones, and lava flows. Currently dormant, the field is likely to erupt again with the next "hundreds to thousands of years", a very short timeframe in geologic terms. The field contains at least 40 volcanoes, most recently active about 600 years ago at Rangitoto Island, erupting 2.3 km of lava. The Pacific Ring of Fire is completed in
Ring of Fire (Northern Ontario) tonnes per year for more than thirty years". Carrabba announced that the ore would be "further processed into 400,000–800,000 tonnes of ferrochrome". The purchase was finalized in 2010. According to Carrabba the area of the Ring of Fire that Cliffs acquired in 2009 represents one of the "premier chromite deposits in the world. Chromite is smelted to produce ferrochrome which is used globally in the production of stainless steel and is categorized as a strategic metal resource by many countries. In May 2012, Cliffs announced a "$3.3-billion investment to build a chromite mine, transportation corridor and processing facility in northern