State health officials urge the public to take precautions as volcanic gas emissions — and volcanic smog known as vog — ...

View of north and south vents from the northwest, approximately 21 hours after the end of episode 18 of the eruption at ...

NPS is warning those hoping to see the eruption — which can be viewed on USGS webcams — that hazardous volcanic gases are billowing into the air and “present a danger to everyone.” ...

Imagine walking into your kitchen and instantly knowing if the fish you bought yesterday is still fresh—or entering an industrial site with sensors that immediately alert you to hazardous gas leaks.