August 21 , 2016. EN. White Island , Santiaguito , Planchon Peteroa , Pavlof .
August 21 , 2016.
White Island , New Zealand :
Replacement Web Camera target installed at White Island
In September 2014 a ‘target’ was established on the top of Donald Mound at White Island that was large enough to be seen in the web camera images. This gave the GeoNet volcano team a reference point on the web camera images and from this we were able to track the water level in the Crater Lake. We were able to track over 5 metres of water level change before it was destroyed by the 27 April 2016 eruption.
This week we have established a new target on the crater rim, so we can start following the water level changes in the new lake, which is now forming on the crater floor. The Crater Lake(s) at White Island have had quite a history of change since the first major lake started to form in 2003. From mid-2003 to early 2006 the water level rose about 26 metres, getting to within 2 meters of overflow. The lake then fell to be about 23 meters lower by mid-2007. During this time the lake was heating, so it was basically being evaporated away. It refilled to about 7 metres below overflow by early 2009 and stayed there until heating started in late 2010. The lake again evaporated away. Small eruptions followed in August and October 2013.
The lake started to reform in November 2013. From December 2013 to May 2014 the lake rose about 3 metres and then remained unchanged until June 2015. Then the water level rose another 2 metres before again starting to evaporate away in March 2016, falling over 2 metres before the 27 April eruption. Conditions are now stable enough for us to start monitoring the water level again via the web camera images. The Crater Lake temperature is now 60 °C and the water level about 31 m below overflow.
Source : Geonet .
Santiaguito , Guatemala :
The Santiaguito Volcano Observatory reports that at 5:58 (local time) a new strong explosion, Vulcanian accompanied by pyroclastic flows and fallout was generated. The explosion sent a thick gray ash column.
The thick column of ash reached an altitude of about 4,500 meters (14.764 feet), and moved mainly to the west and southwest. It has been estimated that it could move on more than 40 kilometers, with falls of ash on the farms and villages of San Marcos and Loma Linda Palajunoj, with the potential to reach Coatepeque and move further in the hours .
This explosive activity of the Santiaguito volcano will continue to generate these events, we must take precautions and avoid staying near the volcanic area. Also take precautions because the ashes cause health problems and contamination of drinking water.
Therefore, The INSIVUMEH recommends:
Maintain vigilance required for this activity and take the same precautions, mainly for air near the volcanic complex, and ash falls that can contaminate water and cause health problems.
At the Directorate General of Civil Aviation,
To take precautions with air traffic as ash move to the West and Southwest, over 40 kilometers with a height of 4500m (14,764pies) above the level of the sea.
Source : Insivumeh
Planchon-Peteroa , Chile :
The National Geology and Mining Service (Semageomin) describes the following information obtained by the National Network Surveillance teams of volcano monitoring, processed and analyzed at the Volcanological Observatory of Southern Andes, Semageomin data interpretation center :
Volcanic complex Planchon–Peteroa:
The level of activity of the complex is at:
LEVEL YELLOW: changes in the behavior of volcanic activity, probable time for an eruption weeks / months.
During the evaluation period, it was recorded 2583 events in connection with rocks fracturing process (called volcano-tectonic) with maximum local magnitude of M 2.2 , located below the volcanic edifice, at depths between 2 and 8 km. The majority of these events has been located 1 km east–southeast of the main crater at a depth of 5 km. In addition, 1599 events associated with fluid dynamics within the volcanic edifice (called events long period , LP) were recorded, with reduced displacement values of 93 cm2, located in the main crater, with depths less than 5 km.
IP camera images showed the presence of small, low energy fumaroles in the month, which did not exceed 100 meters high, from the main crater.
Using data provided by two (2) electronic inclinometers, measuring the deformation of the surface of the volcano, it can be observed direction changes rather compatible with the recent seismic activity of the complex, but in a smaller scale, which lets not deduce that there is a direct relationship between the measured deformation of the surface, with an internal activity of the volcano.
No abnormalities in sulfur dioxide emissions (S02) in the atmosphere have been reported, according to data obtained by the IMO Group (http: //so2.gsfc .nasa.gov /) and NESDIS (National Environmental Satellite ) (http://satepsanone.nesdis.noaa.gov).
No thermal warning was reported in the area associated with the volcano according to data released by the MODIS MODVOLC on its website (http://modis.higp.hawaii.edu/) and Mirova on its website (http: //www.mirovaweb.it/), two monitoring systems that show significant changes in the temperature of the surface of the earth.
There are no reports of local authorities or communities about anomalies seen in the volcanic area.
Monitoring parameters remain above the base level indicating a dynamic process in the volcanic system in depth without reaching or even affect the superficial system. Therefore the level of volcanic alert remains at LEVEL YELLOW.
Source : Service National de Géologie et des Mines (SERNAGEOMIN)
Pavlof , Alaska :
55°25’2″ N 161°53’37 » W,
Summit Elevation 8261 ft (2518 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW
Low-level unrest continues at Pavlof Volcano. Persistent elevated surface temperatures have been detected through cloud cover in satellite data over the past 24 hours. The volcano is obscured by cloudy weather in web camera images. The level of seismic activity has remained low.
Although activity is currently at low levels, the degree of unrest can change quickly and it remains possible for ash and steam emissions to recommence with little or no warning. AVO is closely monitoring the volcano.
Source : AVO