Volcanic and seismic monitoring:
Earthquakes LP, associated with fluid movements, show a slight increase in behavior. Their number is higher than the previous period, at 198 LP / day. However, the energy values generated by such events remain low. Seismicity hybrid type, associated with the rise of magma, show a rate of occurrence lower than in previous days. In the analysis of this week was presented a seismicity of 2 HIB / day, with a total of 15 recorded events. Similarly, the energy values decreased.
Events associated with fracturing of the rock (VT), hold the negative rate indicated in the previous report (No. 29-2015). Although such events remains present, the downward trend continues. Therefore, the internal pressure under the volcano is low. In Numbers: 7 VT / day (previous week 22 VT / day) and low energy values.
The seismic tremor is associated most often with ash emissions observed the volcano. In this period this type of activity has dropped to zero.
Events related to ash emissions during this period were explosions / exhalations, seen with more energy compared to the previous week. A total of 25 earthquakes of this type were recorded, generating a maximum seismic energy of 16 megajoules on July 9.
Campbell Scientific camera installed by the Volcano Observatory South (OVS) near the volcano Ubinas captured in recent weeks the images of explosions of 09 and 11 July and registered exhalations. The ashes resulting from these events were dispersed by the wind to the north, east and south of the volcano. An important fumarole activity was observed as a result of these events, the emission of ash dropped to a moderate level.
July 15, 2015. Ubinas, Perou :
Source : IGP Perou.
Photos : Efe.