June 01 , 2016. EN. Tungurahua , Misti , Bárðarbunga , Klyuchevskoy .
June 01 , 2016.
Tungurahua , Ecuador :
SUMMARY OF THE ACTIVITIES OF THE VOLCANO
The volcanic activity is currently low.
During last night, the descent of small lahars produced by precipitation was recorded.
TECHNICAL AND OBSERVATIONS APPENDIX
From 11:00 (TL) yesterday until 11:00 (TL) today, it was recorded two volcano-tectonic events (VT) and 7 long period events (LP).
Observations emissions and ashes:
During the afternoon and of the evening of yesterday, the volcano remained covered and the surface activity could not be observed.
In the early hours of the morning, we could see a layer of snow on the sides of the crater up to 500 meters below the summit, then the volcano is clouded.
Rain and lahars:
The rains during the night, generated small lahars, with blocks of 30 cm in diameter, which are descended from the gullies of Bilbao, Pingullo and Chontapamba. We also recorded the descent of muddy water through the gullies of Vazcun and Jewish.
If more intense rain problems persist in the volcano area, they can re-mobilize deposits from pyroclastic flows and generate lahars . For this reason, we recommend extreme caution when driving on roads and highways that cross the gorges through which these flows are down and the regions which in the past have been affected by this kind of phenomenon.
Source : IGEPN
Misti , Peru :
The VT type of earthquakes associated with process of fracturing of rocks, recorded a slight decrease in activity compared to the previous period (1 to 30 April 2016). Their average daily rate of occurrence is passed from 24 to 15 VT daily. During this period, no seismic swarms occurred. Such events are located below the main crater at depths between 0.4 km and 2.8 km from the summit of the volcano. The most important event VT of this period took place on May 21 at 6:49 (local time), with a magnitude of 1.6 ml (ML = local magnitude), and was located 1.1 kilometers below the main crater.
Regarding the LP types of earthquakes associated with fluid dynamics (gas and steam) they showed that the rate of average daily presence (<5 LP per day) and energy (<1 Megajoule ) remain low. In addition, the activity of Tremor has not changed much during the previous period. The greatest activity of Tremor corresponds to May 26, with five representative cases. These events were characterized in their duration (<10 minutes) and by low power (<1 MJ).
Regarding the evolution of total daily seismic energy associated with the total activity of the volcano Misti (January-April 2016), greater variation is observed and remains low.
Thermal anomalies: The Mirova system (www.mirova.unito.it) of the University of Turin (Italy) has not detected thermal anomalies on the Misti volcano during that period.
SO2 anomalies: The satellite system GSDM–NASA (http://so2.gsfc.nasa.gov/) « EOS Aura » was not detected major abnormalities of density of SO2 gas (magmatic gases) on the volcano Misti.
Source : IGP
Photo : Exploreperu
Bárðarbunga , Iceland :
On the Bárðarbunga earthquakes :
20 MAY 2016. Seismic measurements around the Bárðarbunga volcano show that the seismic moment release on the caldera ring fault has been gradually increasing since mid September 2015. This means that stronger earthquakes than before have been detected in the last months. Despite the increasing activity, there are currently no signs of volcanic tremor.
The analysis of the earthquake data suggests that the movement on the fault is opposite to what it was during the subsidence period during the Holuhraun eruption. Continuous GPS measurements show movements away from Bárðarbunga, suggesting inflation. Satellite images processed by the University of Iceland show that hydrothermal cauldrons in the ice at the caldera rim have been deepening, which might reflect increasing geothermal activity.
Since the end of the Holuhraun eruption in February 2015, 45 earthquakes of magnitude larger than M3 have been detected around the Bárðarbunga caldera, 42 of them since 1st September 2015 and 31 since 1st January 2016. The strongest events were M4.2 on 8th April 2016 and M4.4 on 20th May 2016. Despite the increasing activity, there are currently no signs of volcanic tremor.
Increasing activity under Bárðarbunga in the last months might reflect magma accumulation below the volcano. However, other explanations have been considered; for example increasing water pressure in the hydrothermal system inside the caldera, pressure changes due to changing ice load or increased friction on the ring fault due to increasing magma pressure.
Cumulative seismic moment released in earthquakes around Bárðarbunga since the end of the Holuhraun eruption. In the upper plot the orange line shows the seismic moment released in the dyke intrusion south of the Holuhraun eruption site, the blue line represents the moment released in or around the caldera. The lower plot shows the magnitudes of the earthquakes as a function of time, blue for the caldera and orange for the dyke.
The Icelandic Meteorological Office is following the activity 24/7 and will update the public in case of any changes.
Source : VEDUR
Photo : Archive 2015.
Klyuchevskoy , Kamchatka :
56.06 N, 160.64 E;
Elevation 15580 ft (4750 m)
Aviation Color Code is ORANGE
Explosive-effusive eruption of the volcano continues. According to video and satellite data, the lava flow continues to effusing on the south-eastern flank of the volcano (along Apakhonchich chute).
Satellite data showed a thermal anomaly over the volcano.
Explosive-effusive eruption of the volcano continues. Ash explosions up to 19,700-26,240 ft (6-8 km) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft.
Source : Kvert
Photo : Yu Demyanchuck , Volkstat ru.