Earthquakes related to rock fracturing (VT) increased slightly over the last two weeks of May. The average rate for the period was 72 VT / day (Report No. 04-2016, VT 61 / day). In addition, a seismic swarm four hours long on May 26, was observed.
The hybrid-type earthquakes recorded a total of nine events with energies below 2 MJ. This type of seismicity is associated with magma movement inside a magma chamber.
LP type of events associated with a fluid movement remain rare, with only five events observed and very low energy (less than 0.2 MJ).
Tremor type events continue to show low activity. In this period, they accumulated 17 minutes of recording. These events occur sporadically and are generally short, with low levels of seismic energy.
Location of events.
During the month of May, it was recorded a total of 377 earthquakes related to fracturing of rocks. These events have presented a magnitude between M 1.3 and M 3.7. The epicentral distribution of seismicity occurs mainly in the volcano’s crater and extends east to three kilometers. The depth distribution of localized events is between 2 km and 13 km under the Ticsani.
In addition, on June 1, there were two major events that have been reported as earthquakes felt by the population (intensity IV). The earthquake of greater magnitude reached M 4.4 (Local Magnitude) and was generated at 19:01 local time the same day.
SO2 anomalies: The satellite system “EOS Aura” GSDM-NASA (http://so2.gsfc.nasa.gov/) recorded low density values of SO2 gas in this period.
Thermal anomalies: The Mirova system (www.mirovaweb.it) not detected thermal anomalies on the Ticsani volcano (VPR = 0 Mega Watts).
Contactez-nous pour organiser votre voyage sur les volcans.
Inscrivez vous sur notre mailling list pour connaitre nos prochains départs “Spécial Eruption Express”
June 04 , 2016.Ticsani , Peru :
Source : IGP
Photo : Mapio , Thierry Dockx.