Tungurahua shows signs of awakening 8 January 2010Posted by admin in activity reports, Ecuador, Tungurahua.
Tags: Ecuador, South America, Tungurahua, volcanic activity reports
For Tungurahua volcano in Ecuador, one of the most active volcanoes in South America, 2009 was a relatively quiet year of rumbles and roars, occasional crater incandescence, and periodic plumes and ashfall. The new year of 2010, however, has brought clear signs of an awakening of Mama Tungurahua.
A gradually declining trend in activity was evident at Tungurahua from the summer of 2009 onwards, but that has now clearly come to an end. The Instituto Geofísico of Ecuador published a special bulletin on 7 January 2010 (PDF) reporting that this trend reversed in mid-late December, and that there has been a marked increase in activity since 30 December 2009:
30 December 2009 – long-period earthquake followed by fumarolic activity with a steam plume reaching 300 metres above the crater.
1 January 2010 – beginning of emissions with low ash content, accompanied by rumbles that have gradually increased their intensity.
3 January 2010 – crater glow visible, lava fountaining begins, with the projection of incandescent material onto the upper slopes and intense rumbling sounds
4 January 2010 – increased ash emissions with eruption columns reaching as high as 2 km above the crater, ashfall reported to the west.
The bulletin also reports that seismic activity has continually increased since 31 December 2009, with numerous periods of tremor accompanying ash emissions, and sulphur dioxide emissions have also increased to 3,200 tonnes/day on 6 January 2010, ‘ten times the values recorded during the preceding weeks and months’. Overall, the Instituto Geofísico warns of further increases in activity, including increased ash emissions, over the next few days:
It is evident that the volcano has begun a new cycle of activity; the changes experienced have been shown in a rapid way, different to that seen on previous occasions when to generate the seismic activity that has been shown in the last 24 hours the volcano had to ‘work’ for weeks and months. In any case the activity occurring both at the surface and internally is considered to be at moderate levels but with clear signs that it is increasing.
Volcanologists have warned that substantial ash emissions, on a scale similar to those of summer 2006, cannot be ruled out. Heavy ashfall would have a damaging impact on agriculture, and local farmers and civic leaders are worried. Local communities are making preparations to deal with increased activity from Tungurahua, with efforts being made to stock up on face-masks and medical supplies and to prepare emergency shelters in the provinces of Tungurahua and Chimborazo.
Las emisiones de ceniza y gases aumentan en el Tungurahua – El Comercio, 5 January 2010
Rápido incremento de actividad de volcán Tungurahua – El Universo, 7 January 2010
El cantón Penipe en alerta por el volcán Tungurahua – Diario Los Andes, 7 January 2010
Autoridades alerta con el despertar del Tungurahua – La Hora, 7 January 2010
Global Volcanism Program: Tungurahua – summary information for Tungurahua (1502-80=)
Instituto Geofísico (Escuela Politecnica Nacional) – Geophysical Institute of Ecuador