Earthquakes LP type (associated with the passage of fluids), during this period, experienced a slight increase, averaging 18 LP / day, while in the previous period it was recorded 15 LP / day; on the other hand, energy is kept low.
In this period there is not recorded hybrid type of event (associated with the rise of magma material). Earthquakes VTPS types (proximal volcano tectonic, very close to the volcano, less than 6 km) experienced a marked increase in the average, scoring 20 VTPS / day in the period (in Report No. 02-2016 had recorded VTPS 10 / day). The magnitude of these events decreased during this period. However, there were 3 regular sized events (2.8 ML) on 19 and 20 January 2016. In this period, the tremor type of earthquakes decreased slightly, recording 11 TRE / day, while their energy is low.
Since early December 2015, VT events registered , associated with rock fracturing, continue to occur very close to the Sabancaya area. In this period, there were a total of 99 VT, distributed on two seismic foci: The first focus is located 6 km north-northeast of the crater, while the second focus, not well defined, is 14 km northeast of the crater, near the PATA station. It was recorded 55 VTP events (called proximal) within a radius of less than 6 km; They belong mostly to the first seismic focus.
Earthquakes are distributed primarily towards North-North-East of the Crater on Sabancaya. Highlights, 3 events VTP with moderate magnitude (2.8 ML) were recorded on 19 and 20 January 2016 with depths between 7 km and 13 km.
Seismicity VTD localized (distal seismicity) reached a total of 44 events, and is mainly distributed in the north and northEast of the volcano crater area. A M 3.5 event is noted, recorded on January 22, 2016 at 6:25 p.m. UTC at a depth of about 7 km.
• Frequency: The emissions of water vapor are constant, which, however, were not observed during the first days of this period, because of the abundant clouds present in the area.
• Color: The emissions observed were whitish gas (water vapor). A bluish color of the gases, a few days (magmatic gases) were observed sporadically and to a lesser extent.
• Height: The height of the fumaroles in this week ranged from 400 to 1000 meters above the base of the crater, approximately.
Anomalies of SO2: The satellite system “EOS Aura” GSDM-NASA (http://so2.gsfc.nasa.gov/) has not registered any significant SO2 density anomalies in that period.
Thermal anomalies: The Mirova system (of www.mirovaweb.it) has not detected by thermal anomalies in this period on Sabancaya.
Source : IGP
Photos : andina.com.pe.