Nicaragua's Masaya Volcano Shows signs of magma refill, raising eruption concerns
A new study finds that the magma chamber beneath Masaya volcano is refilling, prompting scientists to warn of possible future eruptions near Managua's 2 million-person metro area.
A team led by Lizzie Johnson of Penn State’s geosciences program examined six years of satellite observations to track ground deformation at Masaya volcano in Nicaragua. Between 2018 and 2022 the caldera’s central reservoir subsided, suggesting magma drainage, but recent uplift points to new magma entering the system. The volcano, famed for its “Mouth of Hell” lava lake, attracts thousands of visitors and lies within a densely populated region of about 2 million people near Managua.
Although the researchers do not see an imminent eruption, they stress that Masaya’s dual eruptive style—ranging from Hawaiian-type lava flows to violent explosions—requires vigilant surveillance. The volcano also continuously releases sulfur dioxide, a gas hazardous to respiratory health. Further study is needed to refine hazard assessments and develop mitigation strategies for the surrounding communities.
Why it matters
Understanding Masaya’s magma movements helps authorities prepare for potential eruptions that could affect millions nearby.
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