January 05 , 2018 . EN. Dukono , Ticsani , Nevado Del Ruiz , Fuego .
January 05 , 2018 .
Dukono , Indonesia :
VOLCANO OBSERVATORY NOTICE FOR AVIATION – VONA.
Issued: January 04 , 2018
Volcano: Dukono (268010)
Current Aviation Colour Code: ORANGE
Previous Aviation Colour Code: orange
Source: Dukono Volcano Observatory
Notice Number : 2018DUK03
Volcano Location: N 01 deg 41 min 35 sec E 127 deg 53 min 38 sec
Area: North Maluku, Indonesia
Summit Elevation: 3933 FT (1229 M)
Volcanic Activity Summary:
Eruption produced dark grey volcanic ash cloud at 00h14 UTC (09h14 local).
Volcanic Cloud Height:
Best estimate of ash-cloud top is around 6173 FT (1929 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 West.
Eruption and ash emission is continuing.
Activity Level of Level II (WASPADA). The Dukono (1229 m above sea level) has a continuous eruption. Since yesterday to this morning, visually, the volcano is usually covered by haze. When the weather is sunny, the smoke emitted by the crater, white / gray, thick, of medium pressure with a height of 500-600 m above the peak was observed. The wind was moderately easterly.
The seismographs dated January 4, 2018 recorded:
Ash emissions associated with continuous trenches with an amplitude of 0.5 to 12 mm (dominant value of 2 mm).
2 earthquakes of eruption.
There was no rumbling heard at Dukono Post, 10 km north of the summit.
Recommendation: The communities around G. Dukono and visitors / tourists should not move, climb or approach the Malupang Warirang Crater within 2 km.
Source : VSI , Magma.
Photos : Marc Szeglat , Sylvain Chermette ( http://80joursvoyages.com/ )
Ticsani , Peru :
1.- Sismo-volcanic surveillance:
Seismic-volcanic monitoring during this period shows low levels of activity. The seismicity rates are comparable to those of early 2017, with the usual feature of presenting volcano-tectonic events as the dominant seismicity of the region.
VTP (Volcano-Tectonic Proximal) earthquakes, related to rock fracture, continue to have low occurrence rates. An average seismicity rate of 5 VT per day was observed. Similarly, seismic swarms and seismic peaks were not observed during this period.
Distal VTD seismicity (distal volcano-tectonic earthquakes) also had low levels. An average seismicity rate of 3 VTDs per day was observed.
2.- Location of events:
The calculation of the hypocentral parameters shows a dispersed spatial distribution, with superficial earthquakes reaching a local magnitude of 3.0 ML and a depth distribution of up to 17 km from the surface. It should be noted that 18 fracture-type earthquakes were located, which were not perceived by the surrounding populations.
3.- Satellite monitoring:
SO2 anomalies: The GSDM-NASA satellite system « EOS Aura » (http://so2.gsfc.nasa.gov/) recorded low SO2 gas density values during this period.
Thermal anomalies: The MIROVA system (www.mirovaweb.it) did not detect any thermal anomalies on the Ticsani volcano (VPR = 0 megawatts).
Sismo-volcanic activity in the Ticsani region maintains low levels. The seismic events that predominate in this region are related to the fracture processes of the rock.
The seismicity rates are present in small numbers, as is the case of VTP seismicity with 5 earthquakes per day. On the other hand, seismic swarms and hybrid seismicity have not been observed.
The spatial distribution of seismicity shows scattered fracture type earthquakes with amplitudes up to 3.0 ML.
Any changes will be notified in a timely manner.
Source : IGP
Photos : T Dockx , IGP.
Nevado Del Ruiz , Colombia :
Subject: Bulletin of activity of the Nevado del Ruiz volcano.
The level of activity continues at the level: Yellow activity level or (III): changes in the behavior of volcanic activity.
With regard to monitoring the activity of the Nevado del Ruiz volcano, the COLOMBIAN GEOLOGICAL SERVICE informs that:
During the last week, the various monitoring parameters show that the Nevado del Ruiz volcano continues to display unstable behavior.
The seismicity caused by the fracturing of the rocks that make up the volcano showed a slight decrease compared to the number of earthquakes and released seismic energy, compared to the previous week. The earthquakes were mainly in the Northeast, Southeast and near the Arenas crater. Earthquake depth ranged from 1.2 to 6.3 km. The maximum magnitude recorded during the week was 1.5 ML (Local Magnitude), corresponding to the earthquake recorded on January 1, 2018, at 00:31 (local time), located northeast of the Arenas crater, at a depth of 3 , 5 km.
The seismic activity associated with fluid dynamics in the channels of the volcanic structure has shown a decrease in the number of recorded earthquakes and released seismic energy, compared to the previous week. This type of activity is characterized mainly by the occurrence of earthquakes of multiple fluids, of long period type and very long periods, as well as by tremor impulses. The earthquakes were located mainly in the vicinity of the Arenas crater and in the southeast sector of the volcano.
The deformation of the volcano, measured from electronic inclinometers, Global Navigation Satellite System (GNSS) stations and radar images, shows a stability behavior without recording important deformation processes of the volcanic structure.
The volcano continues to emit water vapor and gases into the atmosphere, among which the sulfur dioxide (SO2) is distinguished, as evidenced by the values obtained by the SCANDOAS stations installed on the volcano and the analysis satellite images. In monitoring the information provided by the MIROVA and NASA FIRMS portals, several thermal anomalies have been recorded near the Arenas crater.
The column of gas and vapor reached a maximum height of 950 m measured on the summit of the volcano, on December 31, 2017. The direction of the dispersion of the column was governed by the direction of the wind in the area, which during the week predominated to the southwest over Arenas crater.
The Nevado del Ruiz volcano continues at the level of yellow activity.
Source : SGC
Photos : Milton H. Arias.
Fuego , Guatemala :
Type of activity: Vulcanian
Morphology: Composite Stratovolcan
Geographical location: 14 ° 28’54˝ N Latitude; 90 ° 52’54˝ Longitude W.
Weather conditions: Claires
Wind: North 2 kph
Precipitation: 3.8 mm
The volcano maintains a white fumarole, low, 4400 meters above sea level, which disperses to the west, south and southwest. There were 3 to 5 weak explosions and a few moderate explosions per hour, which ejected gray columns with heights at 4600 m (15,091 feet) that dispersed 10 to 15 kilometers to the west, south and south -Where is. The explosions were accompanied by low rumblings and some, moderate, gave rise to a weak shock wave. Incandescent impulses 200 meters above the volcano, generated weak to moderate avalanches on the crater contour, with glowing blocks falling towards the edge of the vegetation. Falls of fine ash particles have been noted in the region of the villages of Panimache I, Morelia, Santa Sofia, Porvenir, Rochela, Ceylon and others..
Source : Insivumeh
Photo : Archive , Juin 2016.