Poás Volcano Red Alert: 4.5 km Ash & 600 t SO₂ Halt Park

Karmactive Team

Costa Rica has declared a RED ALERT at Poás Volcano with ash plumes soaring 4,500 meters high and substantial gas emissions forcing immediate park closure.

Photo Source: OVSICORI- UNA (YouTube)

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Vulcanologist Geoffroy Avard reports: "At 5:32 in the morning, the volcano erupted again, an eruption similar to Monday's in height—several thousand meters

Photo Source: OVSICORI- UNA (YouTube)

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Unlike previous eruptions sending ash westward, this event's wind patterns are pushing ash southeast, affecting entirely different communities than before

Photo Source: OVSICORI- UNA (YouTube)

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Current monitoring shows sulfur dioxide exceeding 600 tons daily with frequent tremors indicating ongoing magma movement beneath the surface.

Photo Source: OVSICORI- UNA (YouTube)

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What does a Red Alert actually mean for locals and travelers? It's the highest possible warning level, triggering mandatory evacuations and indefinite park closure.

Photo Source: OVSICORI- UNA (YouTube)

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The tiered alert system places Grecia and Sarchí cantons under Orange Alert with high risk of ashfall and dangerous mudflows called lahars.

Photo Source: OVSICORI- UNA (YouTube)

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Approximately 1.39 million people live within the 30km danger zone, with essential safety measures including N95 masks and avoiding contaminated water sources.

Photo Source: OVSICORI- UNA (YouTube)

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How are local communities coping? Over 300 businesses near Poás report revenue

Photo Source: OVSICORI- UNA (YouTube)

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The U.S. Embassy advises travelers to stay updated through official channels and avoid closed areas: "Remain in close contact with your tour operator and local officials."

Photo Source: OVSICORI- UNA (YouTube)

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Recent eruptions have turned Río Desagüe gray with acidic ash slurry, causing respiratory issues and damaging coffee crops in nearby farming communities.

Photo Source: Árni Friðriksson (CC BY-SA 3.0)

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Despite hazardous conditions, monitoring teams continue maintaining critical equipment at the crater's edge to track volcanic activity.

Photo Source: South Florida Water Management District (CC BY-ND 2.0)

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Poás has erupted over 40 times since 1828, with the 2017 eruption causing an 18-month park closure and millions in economic losses

Photo Source: Wikipedia (CC BY 4.0)

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What makes April's eruptions different from earlier activity in 2025? Experts note a shift to sustained, high-energy eruptions potentially linked to deeper magmatic disturbances.

Photo Source: Albert Freeman (CC BY-NC-SA 2.0)

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As of April 25, the Red Alert remains active with the Aviation Color Code at Orange, signaling ongoing hazards for regional flights across Costa Rica.

Photo Source: User:Mattes (CC BY 2.0 DE)

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While the situation requires vigilance, both authorities and communities have extensive experience managing these volcanic events—staying informed is your best protection.

Photo Source: IRRI Photos (CC BY-NC-SA 2.0

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