Turrialba volcano, Costa Rica: news & activity updates

Turrialba volcano (Costa Rica), activity update: continuing unrest, increased fumarolic activity

Unrest at Turrialba volcano continues. Increased fumarolic activity had started in August 2006 and is concentrated mainly  to the W of Turrialba's central crater.

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Turrialba volcano (Costa Rica) - Smithsonian / USGS Weekly Volcanic Activity Report for 5 September-11 September 2007 (Continuing Activity)

OVSICORI-UNA reported that fumarolic activity and gas discharge in and to the W of Turrialba's central crater continued throughout August. New points of gas discharge, small landslides, and accelerated vegetation die-off were noted from various locations within and around the crater. Fumaroles were active in almost all directions in the central crater; many exhibited sulfur deposits and those in the S, SE, and SW reached a temperature of 91 degrees C. Read all

Turrialba volcano (Costa Rica), activity update: increased fumarolic activity

Volcanic unrest at Turrialba volcano continues. Signs of an ongoing slow intrusion of magma at shallow depths indicating a possible eruption in the near-medium term future increase. Read all

Turrialba volcano (Costa Rica) - Smithsonian / USGS Weekly Volcanic Activity Report for 8 August-14 August 2007 (New Activity / Unrest)

OVSICORI reported that from mid-June through 8 August, several changes occurred at Turrialba, including opened fractures, spreading fumaroles, and an acute impact of gases on vegetation. Wide spreading of fumaroles on the upper edifice correlated with enhanced seismicity in mid-July. The principle fumarole in the bottom of the W crater reached 138 degrees C and produced a distinctive sound of a "high pressure valve" heard as far as 500 m away. Read all

Turrialba volcano (Costa Rica) - Smithsonian / USGS Weekly Volcanic Activity Report for 2 May-8 May 2007 (New Activity / Unrest)

On 6 May, scientists from OVSICORI declared a Low Alert Level for Turrialba based on rapid changes during the previous three months, and intensified their fieldwork and data collection efforts. During aerial observation in February 2007, trees looked yellowish due to sustained gas emissions from the W crater. Vegetation growth was noted in previously burned areas on the W and SW flanks near the summit. Read all