Increasing earthquake numbers reported at Ecuador’s Tungurahua volcano

July 1, 2013 – ECUADOR – The number of earthquakes associated with fluid movement within the volcano has risen from 10 daily earthquakes on June 20 to 54 earthquakes on 29 June. These so-called long period (LP) earthquakes often reflect an increase in pressure inside the volcano. So far, the earthquakes are small and not felt by people. In the afternoon of 29 June, mild fumarolic activity was observed in the crater area. Gas sensors installed near the volcano showed no increase in the concentration of SO2 gas, which suggests that the conduit is currently blocked by a plug, which supports the idea of increasing pressure inside the volcano. Based on the above, IGPEN warns that the pressure build-up could lead to an explosion that destroys the plug, as has happened on other occasions, such as on 16 December last year, and result in new activity of the volcano such as in March and May this year. –Volcano Discovery