Hawaii volcano: Red alert issued as Kilauea eruption spews ash cloud and 'vog'

Hawaii volcano: Red alert issued as Kilauea eruption spews ash cloud and 'vog'A red alert has been issued for planes after explosions from Hawaii’s Kilauea volcano intensified. Ash and volcanic smog, or vog, as it is called, rose to 12,000 feet (3,657 meters) above Kilauea’s crater and floated southwest, prompting an “unhealthy air” warning in the community of Pahala, 18 miles (29 km) from the summit. An aviation red alert means a volcanic eruption is under way that could spew ash along aircraft routes, the US Geological Survey (USGS) says on its website.



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