The ash from Turrialba Volcano has forced operators of the Juan Santamaría International Airport, outside Costa Rica's capital city of San José, to temporarily close, affecting at least seven inbound flights.
UPDATED at 7 p.m.: Juan Santamaría International Airport will remain closed until at least 8 a.m. Friday. Airport spokeswoman Silvia Chávez said that reopening was conditional on overnight activity at Turrialba Volcano.
The crater of Poas Volcano expelled material 300 meters into the air at noon on Tuesday. The phenomenon, called a phreatic explosion, occurred due to a reaction between magma and water at the southern border of the lake inside the volcano. However, this was not an eruption and the volcano did not spew lava. Instead, a column of steam, gas and other materials formed and spouted out the top of the volcano, confirmed the Volcanological and Seismological Observatory of Costa Rica (OVSICORI).