Turrialba , Costa Rica : Volcan Turrialba continues its degassing.

Turrialba , Costa Rica : Volcan Turrialba continues its degassing.

Volcan Turrialba continues its degassing.

The National Emergency Commission (CNE) said the Turrialba volcano continues with its abundant degassing, since last May 27, when the emission of ash ceased.
The image was captured in a flyover by Ana Lucia Garita, geodesta the Volcanological and Seismological Observatory of Costa Rica (OVSICORI), held on Monday in conjunction with the National Seismological Network (RSN) and geologists of the CNE, Blas Sanchez and Julio Madrigal .

The flyby was aimed to visualize the morphological changes of the active crater, perform thermal measurements with remote camera, assess the assess of the accumulation of ash on the flanks of the volcano, pastures, streams and impoundments.

Experts determined that much of the material from eruptions has been washed by the rains of recent days. The volcano shows the same behavior for several days, when on May 27 at 2:30 a.m. output decreased ash.

The volcano maintains a discrete signal, being recorded on the RSN seismic stations, which also reflects the continuing the upward movement of fluids. Moreover, the surveillance cameras installed by OVSICORI show passive degassing in an area that not above the crater and is scattered towards the West, this consists mostly of water vapor.

OVSICORI-UNA reported that a strong explosion detected at Turrialba at 2145 on 24 May generated ash plumes that rose 3.5 km above the volcano and drifted SW. The event ejected large rocks around the crater. About one hour later ashfall was reported in multiple areas, including Santa Rosa de Oreamuno, Santa Cecilia de Heredia, and San Francisco de Heredia. At 0015 on 25 May tremor amplitude increased, and at 0030 explosions ejected abundant amounts of ash and incandescent rocks. At 0812 a gas-and-ash plume rose 500 m above the active craters. Large amounts of ash (deposits 2-7 mm thick) fell in the several neighborhoods in the towns of Carthage, Heredia (38 km W), San José (70 km W), and Alajuela (49 km W). Tremor was continuous throughout the day but the amplitude had decreased by 1900. Ash emissions continued, with plumes rising 500 m above the volcano. Tremor decreased at around 0200 on 27 May; emissions likely did not contain ash, which was confirmed at dawn. Ashfall and a strong sulfur odor was reported by residents of Aquiares (11 km SSE), Santa Cruz de Turrialba (8 km SSE), and central Turrialba. Seismicity remained low during 28-31 May, and gas emissions from the crater persisted.

June 02 , 2016. Turrialba , Costa Rica :

10,025 ° N, 83,767 ° W
Summit : 3340 m


Source : La Prensa , GVP .

Photos : Ana Lucia Garita , Emmy Durán.

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