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Santiaguito volcano (Guatemala): actively growing lava dome

Glow at the summit crater of Santiaguito volcano from satellite image on 13 November (image: Sentinel 2)

Glow at the summit crater of Santiaguito volcano from satellite image on 13 November (image: Sentinel 2)

A visible glow and near-constant emissions of gas (so-called degassing) suggest continuing rise of fresh viscous magma into the active Caliente lava dome.

Collapsing parts of lava flows and unstable hot lava dome material are prone to generate moderate hot rock avalanches on the W and E flanks, which may turn often develop into very dangerous pyroclastic flows.

Occasional explosive eruptions occur at the volcano from time to time like today as Volcanic Ash Advisory Center (VAAC) Washington detected an ash plume rising to an altitude of 15,000 ft (4,600 m).

Small incandescent avalanches triggered from unstable collapsing parts of lava dome (source: INSIVUMEH)