Peru - Ubinas : increasing of pressure.

Par Bernard Duyck

Volcanologists of Instituto Geofisico del Peru recorded a grew of seismicity since 22 March Ubinas volcano . One perceives Saturday, March 29 , on the graph of seismic energy , a sharp increase of signals associated with increased pressure in the hydrothermal system of the volcano. The harmonic tremor is also seen . Dome growth reported in the crater is likely to be a stopper

Ubinas - ash analyzed by INGEMMET

Ubinas - an increase of seismic energy between 22 and 29/03/2014 - doc . INGEMMET OVI / PGI / report 29/03/2014

Ubinas present since an explosive activity, marked by small puffs of ash and gases. The authorities transferred Saturday in the night 20 families from Quérapi to the village of Ubinas .

According INGEMMET , analysis of ash, sampled at 2.4 km. volcano between March 22 and 23, suggest that released materials by the explosions of the last days are mainly juveniles ( lava fragments oxidized and hydrothermalised sprayed by volcanic gases )

March 31 , more than 335 earthquakes associated with fluid movements and five low-energy explosions , accompanied by plumes of ash and gas are reported by the newspaper El Comercio .

Ubinas 31.03.2014 / 7:44 - photo INGEMMET

On 1 April, the director of the Instituto del Peru Geofisico - IGP - says an explosion produced an ash plume rising to over 1,000 meters above the crater at 7:42 LT . Neighboring villages were reached by falling ash .