The LP type of seismicity (associated with the passage of fluids), has dropped dramatically this week, from an average of 73 LP / day (Report No. 44-2015) to 9 LP / day. On the other hand, seismic energy LP remains at very low level.
In this period, the number of hybrid type events, HIB (associated with the rise of magma material) presented an average of 1 HIB / day, similar to the previous period.
Seismic Events VTPS or “proximal volcano-tectonic” (very close to the volcano, less than 6 km), showed a significant increase in number and magnitude. 205 events VTPS average / day (Report No. 44-2015: 19 VTPS / day were observed ), and magnitude between M1,5 and M4,0 (local magnitude). In addition, the maximum amplitudes were registered on December 10 and then declined.
The events of tremor types, for the fourth consecutive week have an average of 7 Tremor / day.
In general all type of events VT (break rock) approached the volcano, forming a highly sensitive seismic focus between 0 and 8 km from the crater, with depths between 3-15 km deep.
VTP events (proximal Tectonic Volcano) located within 6 km of the Sabancaya’s crater were distributed mainly in a north – Northeast region. During this period, he had a significant growth in number and size, recording a total of 274 events VTP. The largest magnitude earthquake was located in the area and has reached M 4.0 , at a depth of 9 km (10/12/2015, 9h03 p.m. UTC), the event was located 5 km north – East of the crater.
The seismicity VTD (distal seismicity) decreased in number and size; In addition, she approached the volcano (between 6 and 8 km from the crater); distributed mainly in the north – Northeast of the crater.
The emission of steam and magmatic gases was constant during that week. The maximum height of fumaroles was between 800 and 1400 meters above the crater.
The monitoring of the density of SO2 and thermal anomalies, through satellite imagery indicate small values.
December 16, 2015. Sabancaya, Peru :
Source : IGP
Photos : IGP.