Hawaii's Kilauea volcano is spewing 'vog' — volcanic smog that may include glass shards
"Imagine inhaling tiny slivers of glass."
The lava that began spewing from Hawaii's Kilauea volcano earlier this month is no longer a threat to the public, but officials are now warning that the volcanic smog it’s emitting could include dangerous glass shards.
The U.S. Geological Survey said Wednesday that lava from Kilauea continues to be confined to a closed area of Volcanoes National Park on Hawaii’s Big Island, which prompted the agency to downgrade the risk alert from code red — the highest level — to orange.
But in its advisory, the USGS added that high levels of volcanic smog, or “vog,” from the eruption could travel downwind and potentially affect air quality.
How is vog dangerous?
“Vog creates the potential for airborne health hazards to residents and visitors, damages agricultural crops and other plants, and affects livestock,” the USGS said.
Specifically, the hazards include “Pele’s hair” — tiny, lightweight volcanic glass fragments named after Pele, the Hawaiian goddess of fire — that may become airborne and be carried by the island’s strong winds.
Residents were urged to minimize exposure to these volcanic particles, which can cause skin and eye irritation.
“Imagine inhaling tiny slivers of glass,” Don Swanson, a former research geologist at the Hawaiian Volcano Observatory, told Live Science in 2018. “That's what the Pele's hair is. It can inflame and irritate anything that comes in contact with it.”
When did the eruption start?
Kilauea, one of the world's most active volcanoes, has been erupting almost continuously since 1983. Its current eruption began on June 7, when fire and glowing lava lit up the night sky and began filling the volcano's surrounding crater.
“On the first day of the eruption, extreme heat from the lava created wind vortices that sucked up ash and whipped chunks of lava across the Halemaʻumaʻu crater — an event that the Weather Channel dubbed a ‘volcano-nado,’” Live Science explained.
“Kilauea overlook was spectacular this morning,” Volcanoes National Park spokeswoman Jessica Ferracane told the Associated Press that day. “It was molten red lava. There are several areas of pretty robust fountaining. It’s just really, really pretty.”
It was the second eruption this year from Kilauea, following a similar one in January.
What’s next?
The USGS is closely monitoring the Kīlauea volcano — as well as Mauna Loa, the world's largest active volcano — for volcanic and seismic activity that could threaten people or structures.
One of Kilauea's most catastrophic eruptions occurred in 2018, when lava flowed across the Big Island, destroying over 700 homes. That eruption came several hours after powerful earthquakes rattled the Big Island.
