Sustained tremor activity that started at 8 p.m. Wednesday marked a new spike in activity at Turrialba Volcano. At 1:45 a.m. Thursday the crater began spewing ash and vapor, experts from the Volcanological and Seismological Observatory of Costa Rica (OVSICORI) and the National Seismological Network (RSN) reported.
The gas and ash plume reached some 1,500 meters (4,900 feet) above the crater of the volcano, located some 50 kilometers east of San José.
Emanations remained constant until 7:15 a.m., OVSICORI volcanologist

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