San Cristobal volcano has burst back to life, causing about 3,000 Nicaraguans to flee.
The eruption lofted clouds of ash up to 5 km (more than 16,000 feet) high on Saturday, the Washington Post website said.
The 3,000 people were evacuated from nine nearby villages.
The 5,725-foot San Cristobal volcano is located in the Marrabios Range of western Nicaragua (Smithsonian National Museum/Jaime Incer).
Highly active San Cristobal volcano erupts often, with relatively small blasts happening almost yearly, according to Eric Klemetti and the Eruptions blog.
The volcanic blast followed a Sept. 5, magnitude 7.6 earthquake in neighboring Costa Rica. Klemetti tended to play down a direct link between the quake and the eruption, but he did write that such a correlation "is interesting."
Both the volcano and the Costa Rica temblor are related to the same triggering factor, seafloor subduction beneath Central America along the Middle America Trench.
A volcanic arc, or string of volcanoes, stretches from Guatemala to Panama, parallel to the Middle America Trench.
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