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# Masaya Volcano Seems to Be Inhaling and Exhaling at Once
- URL: https://www.gottabekidding.me/masaya-volcano-seems-to-be-inhaling-and-exhaling-at-once/
- Published: 2026-11-05T11:01:00.000Z
- Updated: 2026-11-05T11:01:00.000Z
- Description: Beneath a popular Nicaraguan volcano, the magma may not live in one place. Satellite radar hints at two, and they seem to be heading opposite ways.
- Author: Tectonics
- Tags: Earth Sciences

The ground under a Nicaraguan volcano sank for a while, then started rising again. The patch around its lava lake never got the memo and just kept sinking.

Penn State researchers caught this split personality at Masaya, a volcano near Nicaragua's capital, Managua. Roughly 2 million people make their homes within 13 miles (21 kilometers) of it, and visitors flock to its national park to look down into a lake of molten rock.

The team tracked six years of ground motion, 2018 through 2024, with radar from the Sentinel-1 satellite, which sweeps past roughly every 12 days. Radar matters here because it sees through clouds, and the tropics have plenty.

Across the wider caldera, a giant sinkhole left behind by an emptied magma chamber, the ground dropped and then rose. The researchers read the drop as magma draining away and the rise as the main reservoir swelling back up, possibly fed by a new, deeper supply of magma.

Then there's Santiago, the main crater and home of the lava lake. The ground around it deflated for the entire study, on its own schedule. The team says that points to plumbing more tangled than a single tank, and the cause could be a shallower second reservoir running low. The findings appear in Geophysical Research Letters.

Masaya's last big lava flow came in 1772, though its constant gas release often pushes sulfur dioxide to dangerous levels. The researchers found no immediate threat to nearby communities and say keeping watch on the magma system makes hazards easier to spot. The lead author adds that the system is still poorly understood.

Somewhere under Masaya, the deeper reservoir appeared to be refilling while the ground around its lava lake sagged the whole time. Sentinel-1 watched both, right through the clouds.

**Read the full story at** [Penn State, October 1, 2026](https://www.psu.edu/news/earth-and-mineral-sciences/story/double-trouble-two-active-magma-reservoirs-indicated-masaya?ref=gottabekidding.me)

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**Hot Take:** Masaya is a textbook situationship. One reservoir filling up, one pulling away, toxic fumes the whole time, and people still show up for the views.