November 22 , 2017. EN. Agung , Cumbal , Turrialba , Poas , Rincon de la Vieja , Pacaya .
November 22 , 2017.
Agung , Indonesia :
Based on the analysis of visual and instrumental data and considering potential threats of danger, on October 29, 2017 at 16:00 WITA, the activity level of G. Agung was lowered from Level IV (Awas) to Level III. (Siaga). Since yesterday, visually the volcano is clearly visible until the appearance of the mist. The crater emits a white smoke, thin, gray, low pressure, which reaches a height of 300 to 1000 m above the summit. At 17:05 h, an eruption occurred, rising 700 meters high from the summit, as well as the emission of a white, thick, gray smoke. A small rain of ash (0-0.1 mm) in the Pidpid-Nawehkerti area was noted. The seismograph records a continuous tremor vibration with an amplitude of 2 to 7 mm (dominant 3 mm)
The seismograph dated November 21, 2017 recorded:
1 earthquake of eruption.
5 shallow volcanic earthquakes (VB)
8 volcanic earthquakes (VA)
1 non-harmonic earthquake
1 episode of Harmonic tremor.
2 emission earthquakes
1 Local Tectonic Earthquake (TL)
2 distant Tectonic Earthquakes (TJ)
Communities and mountaineers / visitors / tourists must not ride or carry out any activity in the estimated danger zone around the crater area of G. Agung and within an area of 6 km radius around the crater, with sectoral expansion North-North-East, South-South-East and South-West up to 7.5 km. The hazards of the estimated areas are dynamic and continually evaluated and can be modified at any time based on the most recent observational data from G. Agung.
VOLCANO OBSERVATORY NOTICE FOR AVIATION – VONA.
Issued: November 21 , 2017
Volcano: Agung (264020)
Current Aviation Colour Code: ORANGE
Previous Aviation Colour Code: yellow
Source: Agung Volcano Observatory
Notice Number: 2017AGU15
Volcano Location: S 08 deg 20 min 31 sec E 115 deg 30 min 29 sec
Area: Bali, Indonesia
Summit Elevation: 10054 FT (3142 M)
Volcanic Activity Summary:
Eruption with volcanic ash cloud started at 0905 UTC (1705 LT). Eruption and ash emission is continuing.
Volcanic Cloud Height:
Best estimate of ash-cloud top is around 12294 FT (3842 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer.
Other Volcanic Cloud Information:
Ash cloud moving to east – south east.
Seismic activity is characterized by volcano tectonic earthquakes.
Bali AirNav branch continues to monitor the presence of volcanic ash at Ngurah Rai Airport with test paper. Coordination is close with the BMKG and the PVMBG / active item. AirNav Indonesia Director of Operations Wisnu Darjono said he coordinated with the BMKG and PVMBG to observe the Darwin Volcanic Ash Advisory Center (DVAAC) using the paper volcanic test, and the result is negative.
In addition, the pilot report (PIREP), reported to AirNav that there was a small cloud of ash from Gunun Agung moving eastward. « So far, we are telling the public that there is no volcanic ash at Ngurah Rai airport and the eruption of Mount Agung does not impact flight activities in Bali, » said Vishnu. , Wednesday (22/11).
Source : VSI / Magma , Balipost.
Cumbal , Colombia :
Subject: Cumbal Volcano Activity Bulletin.
The level of activity of the volcano is maintained at the level:
YELLOW LEVEL, (III): CHANGES IN THE BEHAVIOR OF VOLCANIC ACTIVITY
Following the activity of the CUMBAL VOLCANIC COMPLEX, the COLOMBIAN GEOLOGICAL SERVICE informs that:
During the period evaluated, from November 14 to 20, 2017, there was a slight decrease in the frequency of earthquakes, from 344 during the previous period to 323 during the current period; ‘between them coming from a transient source in time. The events associated with the rock fracture were mainly near the crater, northeast of the volcanic complex, at distances less than 9 km, depths up to 5.3 km from the volcanic peak and local amplitudes less than 0.6 on the scale. of Richter.
Favorable climatic conditions at the summit made it possible to record gas emissions during the entire period evaluated, mainly from the El Verde fumarole fields in the northeast and Rastrojo in the south-west of the volcanic complex. The emission columns were observed of white color, of variable height and a direction of dispersion changing by action of the wind.
The COLOMBIAN GEOLOGICAL SERVICE is attentive to the evolution of the volcanic phenomenon and will continue to inform in a timely manner about the detected changes.
Source : SGC
Turrialba , Poas , Rincon de la Vieja , Costa Rica :
Turrialba, Poas and Rincon de la Vieja Volcano Activity Bulletin, November 21, 2017, updated at 12:45 pm
The seismic activity over the last 24 hours continues to show frequent signals, with intermittent amplitudes of volcanic tremors of short and variable duration. Frequent low frequency volcanic earthquakes (LP long period type) with short and variable amplitudes and durations are also recorded. These seismic signals are associated with the movement of fluids within the volcano. Degassing persists in the western crater.
The volcanic plume rich in water vapor, with a low content of magmatic gases and fine aerosols, is maintained at a height that fluctuates between 500 and 1000 meters on the summit of the volcano. Small amounts of ash are sporadically emitted, however, residents did not report ash drop or smell perception of sulfur. The predominant winds scatter plume materials mainly to the northwest and north-northeast. At night, we continue to observe strong radiation in the western crater, indicating a significant flow of heat and volcanic fluids at temperatures of at least 500 degrees Celsius. According to the chemical and meteorological sensor records of the OVSICORI-UNA volcanic gas and aerosol monitoring station located in Coronado San José, 87% of aerosol aerosols PM10 have maximum concentrations of 25 and 30 μg / m3 (below the maximum allowable limit of 100 μg / m3 for a 24-hour exposure period) and come mainly from the North-East, ie the Turrialba volcano.
The level of seismic activity in Poas is very low and is close to the level of instrumental noise and the environment (wind, rain, lightning, anthropic noise, etc.), although the holes in the crater floor continue to degas a vigorous plume rich in water vapor, with a low content of magmatic gases and fine particles of rock and minerals.
The low level of seismic activity indicates a system of ducts, cracks and sufficiently open cavities where the fluids are easily transported.
The temperature of the fumaroles has decreased and they are generally below 200 degrees Celsius.
The plume of Poas has a height between 500 m and less than 1000 meters above the bottom of the crater. The winds scatter materials from the volcanic plume to the South-Southeast.
No reports of ash drop or smell perception of sulfur were received by residents.
Rincón de la Vieja Volcano:
Seismographs sporadically record low amplitude and short duration volcanic tremor signals and infrequent low amplitude LP-type earthquakes. From time to time, a diffuse plume of water vapor and gas emitted by the active crater rises between 100 and 300 meters above the summit of Rincón.
Source : Ovsicori
Pacaya , Guatemala :
Type of activity: Strombolian
Morphology: Composite Stratovolcan
Location: 14 ° 22’50˝ Latitude N; 90 ° 36’00˝ Longitude W.
Due to the low wind speed on the Pacaya volcano, OVPAC reports a sustained degassing plume that began yesterday morning (at around 8:00 am), as seen on the camera in the area. The presence of this type of event is a product of the constant activity that the volcanic complex has exhibited since the beginning of 2017.
This plume is usually composed of water vapor and should be dispersed in its entirety within the next hours.
Throughout the year, the activity of the complex was characterized by weak to moderate explosions, sometimes sensitive by the population within a radius of 2 to 3 kilometers, as well as by changes in the intra-crater vent. finally forms a cone. Due to the constant development of this activity and its belonging to a dynamic environment, the possibility that the explosions tend to increase and eventually form a new lava flow is not excluded.
For the above, INSIVUMEH recommends:
At SE-CONRED: Be aware of the daily activity of Pacaya Volcano.
At Pacaya Volcano National Park: Continue with the ban on climbing guides and tourists to Mackenney Crater due to the current explosive activity of the volcano.
Source : Insivumeh