Researchers Identified Two Magma Reservoirs at Masaya
A six-year study revealed complex ground movements beneath the Nicaraguan volcano.
Updated on Oct. 13, 2026 in Geology
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Researchers from Penn State identified two active magma reservoirs beneath Masaya volcano using satellite radar data collected between 2018 and 2024. The study, published on July 23, 2026, tracked ground movement to determine how magma stores and drains underground.
Why it matters
Understanding the internal plumbing of volcanoes like Masaya is essential for improving hazard monitoring at basaltic sites worldwide. While researchers observed surface changes, they noted no immediate danger to the 2 million people living within 13 miles of the volcano.
Researchers utilized radar measurements captured by the Sentinel-1 satellite every 12 days to analyze surface changes. This interferometric synthetic aperture radar data allowed for precise measurement of distance shifts between the satellite and the volcanic ground.
The players
Penn State
This is a public research university that served as the home institution for the team conducting the Masaya volcano analysis.
Masaya volcano
This is an active basaltic volcano located in Nicaragua that features a prominent lava lake.
The details
The analysis showed that ground within the caldera rose while the surface around the Santiago crater sank during the study period. These movements suggest a dynamic process where magma drains from and inflates separate underground reservoirs.
Timeline
1772: The date of the volcano's last major lava flow.
2018-2024: The timeframe for the satellite-based ground movement study.
July 23, 2026: The date findings were published in Geophysical Research Letters.
The Big Picture
This study follows a pattern set by the Sentinel-1 satellite monitoring program, which provides global radar coverage for geophysical research. These findings improve the ability to model underground magma systems at basaltic volcanoes.
The findings provide a more detailed understanding of how basaltic volcanoes behave, which may lead to better hazard forecasting models for high-risk areas. While there is no current threat, improved monitoring helps scientists track volcanic activity over long timeframes.
The takeaway
Volcanoes are dynamic systems that can show significant internal shifts even during periods of relative surface stability. Future modeling efforts will focus on clarifying the connections between these subterranean reservoirs to enhance volcano safety.
Further reading
Learn more about the earth sciences in our Geology section.
Source note: This article includes information reported by SciTechDaily.
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