Activity of the last three days in Turrialba / Costa Rica

The Turrialba maintains an activity made frequent eruptions

On 16 May, an eruption, starting at 15h07, was accompanied by a small pyroclastic flow.

 

Volcán Turrialba. 16 mayo 2015 - Webcam OVSICORI & Información Dr. Javier Pacheco

Turrialba - the ash plume of 05/17/2015 - photo Reina Sánchez S. via RSN

On 17 May, ash plumes are reported by the RSN.

On 18 May, the CNE / Comisión Nacional de Emergencias decided to increase the access restriction zone around the crater: it is passed from two to five kilometers.

This measure will remain in effect for at least one week to allow the Ovsicori and RSN to carry out a monitoring and observations to assess the evolution of Turrialba and its regional impact.
 

Seismogram with indications of eruptive episodes at the Turrialba 180.05.2015 - Doc. RSN

Turrialba - 18.05.2015 / 10:17 - webcam OVSICORI

At least six eruptive episodes, lasting between 19 and 30 minutes, occurred during the day of 18 May. The RSN / Red Nacional Sismológica recorded five episodes of tremor on a diagram (shown after the arrow)at respectively 4h16, 6h49,12h14,13h44 and 14h25..

At 15h38, an emission of ash suggests a new eruption in progress. Because of the cloud cover, it was not observed.
 

Turrialba - simultaneous view from the webcam of Turrialba, on the left and that of Irazu, on the right - Doc. Fiorella Castro

Turrialba - 05/18/2015 - A new eruption began at 1:44 p.m. - Fotografía Raúl Mora-Amador / RSN

Sources :

- OVSICORI-UNA

- R.S.N.

- C.N.E.