LP type Earthquakes (associated with the passage of fluids), during this period, have declined slightly on average 15 LP / day, while in the previous period it was recorded 18 LP / day. Moreover, their energy was low.
In this period there was no hybrid type of event (associated with the rise of magma material). Earthquakes VTPS (proximal volcano-tectonic), less than 6 km from the volcano, have maintained the same average as the previous year, recording 20 VTPS / day in the last week. The extent of VTPS increased to 3.9 ml and 4.0 ml; These events were recorded on 31 and 29 January, respectively. The earthquakes type tremor were steady , registering a rate similar to the previous period (11 TRE / day on average). However, there has been a significant increase in their energy, registered on 28 January, which reached a total value of 2701 MJ that day. This large increase in power was caused by an earthquake recorded at 12:36 UTC.
VT localized events (associated with rock fracturing) persist in the area very near the Sabancaya . In this period, there were a total of 133 VT, distributed to form a single group in North-East. 93 VTP events (called proximal) situated in a radius less than 6 km have been registered. Earthquakes are distributed primarily in North-East compared to the crater. Among these VTP, we must emphasize two important events of magnitude 3.9 and M M4,0, recorded on 29 and 31 January at 10:51 UTC and 4:06 p.m. hours respectively, with depths between 9 and 11 km.
Seismicity VTD (distal seismicity) reached a total of 40 events, and is mainly distributed in the Northeast region of the volcano’s crater. ML 3.9 event stands out, recorded on January 30, 2016 at 4:03 p.m. UTC at a depth of about 9 km.
Water vapor emissions remain constant, with a density between medium and high. During some parts of the day, it was not possible to visualize due to the weather in the region, mainly 31 January and 1 February.
Their staining was observed whitish (water vapor). Sporadic bluish emissions (magmatic gases) were observed.
The height of the fumaroles in this period (January 26 to 1 February), varied between 400 and 1200 meters above the base of the crater, approximately.
SO2 anomalies: The satellite system “EOS Aura” GSDM-NASA (http://so2.gsfc.nasa.gov/) shows a slight increase in the density of SO2.
Thermal anomalies: The Mirova system (www.mirovaweb.it) has not detected thermal anomalies on the Sabancaya.
February 04, 2016. Sabancaya , Peru :
Source : IGP
Photos : Losviajesdeali , Actulatinos .