Aviation red alert means a volcanic eruption is under way
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Hawaii sources added that explosions intensified on Hawaii's Kilauea volcano on Tuesday, spewing ash and sparking a red alert for aviation for the first time since the latest eruption began 12 days ago. Accordingly Ash and volcanic smog, or so-called vog, rose up to 12,000 feet (3,657 meters) above Kilauea's crater and floated southwest, covering cars on Highway 11 with gray dust and sparking an "unhealthy air" advisory in the community of Pahala, 18 miles (29 km) from the summit.
Meanwhile an aviation red alert means a volcanic eruption is under way that could affect aviation by spewing ash into air routes, according to the US Geological Survey (USGS) website. Media reports stated that Ash was also a new hazard for residents of Hawaii's Big Island already dealing with volcanic gas and lava that has destroyed 37 homes and other structures and forced around 2,000 residents to evacuate.
Further a shift in winds was expected to bring ash and vog inland on Wednesday and make them more concentrated, said John Bravender of the National Oceanic and Atmospheric Administration (NOAA). Moreover Ash is not poisonous but causes irritation to the nose.