May 08 , 2017. EN. Planchon Peteroa , Nevado Del Ruiz , Sinabung , Santiaguito .
May 08 , 2017.
Planchon Peteroa , Chile :
Planchón – Peteroa volcanic complex:
During the second fortnight, fifty – one (51) events related to fracturing processes of rigid materials called volcano – tectonic (VT), with a maximum local amplitude (ML) of 2.4, were recorded. Located 1.9 km north-northwest (NNO) active craters, at a depth of 4.7 km. Most of the other events were under the volcano at depths of 4 to 7 km.
For events related to fluid dynamics (known as LP long period events), 277 events were classified, with local magnitudes (ML) less than M 1.4 and a maximum reduced displacement value (RDC) of 25 cm 2 .
The IP camera images showed the presence of small, low-energy, whitish degassing. April 24 is the day on which it was highest, but the height did not exceed 100 m above the level of the active craters of the complex.
From the data obtained by three (3) GNSS stations, the measurement of deformation of the volcanic complex showed minor variations in the two horizontal and vertical displacements. The control line crossing the complex from north to south has shown its compatibility with the stability recorded by the monitoring stations, recording low amplitude displacements. On the other hand, the data provided by one (1), electronic inclinometer installed in the complex, also show changes related to the morphology of the volcano.
No abnormalities in sulfur dioxide (SO2) emissions into the atmosphere near the volcanic complex sector were noted, based on data from the OMI monitoring instrument , Sulfur dioxide Group( Http: //so2.gsfc. Nasa.gov/) and NESDIS (http://satepsanone.nesdis.noaa.gov).
No thermal alerts were reported in the area associated with the volcanic complex according to data published by the Mirova site on its Internet portal (http://www.mirovaweb.it/), a remote sensing system that indicates significant changes in the Temperature of the Earth’s surface from the data of the MODIS spectroradiometer.
Although activity has decreased significantly, the recording of VT seismic events with amplitudes greater than M2 in the vicinity of the active craters could be related to the continuity of a dynamic process in the complex deep magmatic system , of lesser intensity, which does not affect the hydrothermal surface system. In this context, although there is less chance, the development of a direct interaction between the two systems could still occur, with the consequent generation of a low explosive activity in the first place, which would have an impact on the Areas near active craters with low to medium scale ash emissions.
From the foregoing, a danger zone is considered to be that contained within a radius of 1 km around the zone of active craters which it is recommended to restrict access. The level of volcanic alert remains at the YELLOW level: changes in the behavior of volcanic activity.
Source : Sernageomin
Nevado Del Ruiz , Colombia :
Activity report extraordinary of the Volcano Nevado del Ruiz, 5 May 2017 03:15
Subject: Volcanic Activity Bulletin Nevado del Ruiz. Yellow level or (III) activity: changes in the behavior of volcanic activity.
As regards the monitoring of the activity of the Nevado del Ruiz volcano, the Colombian Geological Survey reports that:
May 5, 2017 02:59 (local time), a volcano-tectonic earthquake associated with the fracturing of rocks inside the volcanic edifice, magnitude 3.2 ML (local magnitude), located at 4 , 3 km north of the Arenas crater, at a depth of 5.07 km was recorded. This event, so far, has been reported as being felt by the PNN (National Park)
Latitude: 4˚ 56.07 « N
Longitude: 75˚ 19.99 « W
Depth: 5,07 km
Magnitude: 3.2 ML
The Nevado del Ruiz volcano continues to evolve and it is possible that new events that may indicate an acceleration of the process, involving greater instability and, consequently, changes in its level of activity. While the instability of the volcano extends over more than six years, it is essential not to become accustomed to its behavior and to be attentive to the official information published by the Colombian Geological Service.
Source : Observatoire Manizales
Photo : Cesar Rios
Sinabung , Indonésia :
Mount Sinabung Erupts More Frequently .
7 MAY 2017. Center of Volcanology and Geological Disaster Mitigation recorded that Sinabung Mount in Karo Regency, North Sumatra Province has erupted more frequently in the past few days.
Center of Volcanology and Geological Disaster Mitigation of Sinabung Mount Monitoring Staf M Nurul Asrori said that until Sunday noon, Sinabung Mount has erupted four times. The eruption produced 2,000 to 2,300 meters of volcanic ash.
It is also recorded that Sinabung Mount erupted 11 times on Thursday (4/5), eight times on Friday (5/5), and six times on Saturday (6/5).
« It is still active because the status is Level 4 or on Alert,” he said.
Center of Volcanology and Geological Disaster Mitigation has implemented « red zone » or prohibition to enter in the radius of three kilometers.
Nevertheless, for certain sectors, red zone radius is extended due to the long range of hot cloud resulting from the eruption. The red zone is seven kilometers for south-southeast sector, it is six kilometers for southeast-east sector and it is four kilometers for north-east sector.
Source : TEMPO
Photo : Endro Lewa
Santiaguito , Guatemala :
Due to weather conditions and rainfall in the Santiaguito volcano areas, from 21:45, OVSAN, Santiaguito Volcano Observatory and Stg3 Seismic Station recorded the descent of a lahar fort by the River Cabello Of Angel, a tributary of the River Nima1.
This lahar is about 30 meters wide and 2 to 2.5 meters high, involving fine to medium volcanic material and coarse blocks up to 2 meters in diameter, branches and trunks. Due to the constant activity of the Santiaguito, this lahar descends with moderate temperatures, releasing a slight odor of sulfur on its downstream journey.
Source : Insivumeh
Photo : Conred