The Turrialba had four explosive eruptions in less than 24 hours.
On July 24 from 18h., the magnitude of the tremor signal has risen, without being observed ash emissions.
At 21h23 and 22h17, two eruptions, described as moderated by the RSN, are characterized by the emission of ash, gas and fragments of rocks at high temperature.
Between 23 pm on July 24 and 4h40 on July 25, the amplitude of volcanic tremor has increased, accompanied by passive and continue emission of ash and gas, culminating with the explosive eruption of 7h22.
Short, about two minutes, she began abruptly, given the video, from two-tight emission points. A small pyroclastic flow remains within the inner slope of the crater, while the ash plume rises almost vertically to reach 3,000 meters above the crater. This height is reached in the sudden release of energy effect, combined with a low-speed wind.
A small steam plume develops at the end of the pyroclastic flow.
Turrialba - 07.25.2016 / 7:26 - little pyroclastic flow inside the crater, while the plume rises - RSN webcam
Turrialba - 07.25.2016 / 7:27 - development of a small plume of steam at the end of the pyroclastic flow - RSN webcam
Turrialba - 07.25.2016 - Development of the plume from the explosion of 7:22, left on the webcam Ovsicori and right, in the photo of Volcan Turrialba Lodge - a click to enlarge
Turrialba - explosion 07.25.2016 / 7:22 - Doc. RSN
Erupción Volcán Turrialba 25 de Julio 2016 / 7:22 am - Doc.Ovsicori
At 8h28, a fourth explosion propels the ash plume at 1,300 meters above the crater.
Sources: Ovsicori and Red Nacional Sismologica