13/05/2015. Etna, Guagua Pichincha , Calbuco .
Etna, Sicile :
Update INGV ETNA, May 12, 2015, 15hoo
The night between 11 and 12 May 2015 started a small strombolian activity continues inside the new Southeast Crater (NCSE) of Etna, after almost three and a half months of eruptive calm. During the early hours of May 12, the high-sensitivity surveillance camera on the Montagnola (EMOH; see left image) has started to show glows from the eastern part of the NCSE. On the morning of May 12, the activity has gradually intensified, even generating small abnormalities on the images of thermal cameras on the Montagnola (EMOT) and Monte Cagliato (EMCT)
Absolutely classic behavior of the source of volcanic tremor, which is almost at the surface and moves to the position of the NCSE (visible graphic in the operations room of the INGV-Osservatorio Etneo)
The main source is located in the eastern part of the NCSE crateric depression, while more rarely active, there is a second mouth in the middle of the crater. There was also a slight and slow increase on the average magnitude of the volcanic tremor and its typical superficialization, which is also placed in a position in the center of the summit area, to the NCSE.
This recovery of eruptive activity at NCSE was preceded on the night of May 2 to 3 by a sudden increase in the amplitude of the volcanic tremor and intense degassing, pulsating , from the Voragine, accompanied by a source of tremor superficial. This episode was not accompanied by eruptive phenomena visible, and after a few days, the magnitude of the quake returned to normal levels, while degassing is still ongoing.
Source : INGV
Photo : INGV, Turi Caggegi.
Guagua Pichincha , Equateur :
Seismic activity of Guagua Pichincha volcano
According to reports from Rodrigo Viracucha refuge guardian of Guagua Pichincha, on May 2, the volcano became clear and it was found that the fumaroles and sulfur smell was normal; on May 3, the existing bad weather conditions in the crater area did not allow for comments. During the night and early morning, heavy rains were recorded in the volcano area.
Fumarolic Activity 02.05.2015 volcano Guagua Pichincha. Photo: R. Viracucha.
On 4 May 2015, the volcano remains clear for about two hours and early morning, an increase of vapors and gases through the fumarole field was observed, as shown in picture 2. Overall fumaroles reached a up to 50 m high. (As usually 15 m.) The sulfur smell was stronger than the previous days.
In its special reports IG-EPN mentions recording 15 seismic events between 5 and 9 March, 58 events on March 31 ; most of them long-period type (LP) and related to the flow of fluids inside the volcano. Then , on April 18, 2015, the occurrence of 79 Volcano tectonic events (VT), related to the fracturing of rocks in the volcano are reported; On April 23, 2015, record of two phreatic explosions, On April 20 the occurrence of 33 type VT events and 5 LP type events registered on April 21. Finally Wednesday, April 29, 2015 a tremor signal of 3 hours in the stations of the Guagua Pichincha network are reported.
On 1 May 2015 it was again an increase in the number of events: 66 Type VT events and 4 LP-type events have been recorded; for the day of 2 May only 6 VT were registered and on 4 May 1 LP.
Considering the increased seismic activity and relative increase in the fumaroles activity The IGEPN, will produce in the coming days efforts to extend the volcano monitoring network.
Source : IGEPN
Calbuco, Chili :
We continue to record seismic activity associated with the movement of fluid within the volcano, the tremor signal remained within levels considered low, with reduced displacement values (CD) equal to or less than 0 6 cm2. Because these values are low, it was possible to detect some discrete events.
In addition, two (2) events long period type were recorded, with equal or lower magnitudes of M 0.4 , and reduced displacement (DR) less than 0.6 cm2, values considered as low. Regarding the type of VT seismicity (associated with fracture of rock) three (3) events were recorded, with an energy of local magnitude (ML) higher of M 0.3 , located 4,7 km at the west-northwest of the crater (NW) with a depth of 8.3 km.
Source : Sernageomin