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A strong hydrothermal explosion took place at Costa Rica's Rincon de la Vieja volcano at 16:16 UTC (10:16 LT) on April 19, 2020. 

According to OVSICORI-UNA, a steam and ash plume rose approximately 1 500 m (4 900 feet) above the crater. This is 3 416 m (11 200 feet) above sea level.

The eruption lasted approximately 1 minute.

Periodic hydrothermal explosions at the volcano were reported from April 8 to 14. A possible small eruption occurred on April 8 and was followed by a decrease in the amplitude of tremor signals.

A small-scale hydrothermal explosion was recorded by the infrasound and seismic networks lasting 20 seconds on April 11. Water and sediment was ejected onto the upper flanks of the volcano. The event was recorded by the webcam located in Sensoria, 4 km (2.5 miles) N of the crater.

In the morning local residents noted that the water in the Pénjamo River was milky white.

A small hydrothermal explosion on April 13 produced a plume of steam and gas that rose 500 m (1 640 feet).

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