December 03 , 2017. EN . Agung , Misti , Sinabung , Reventador .
December 03 , 2017.
Agung , Indonesia :
On the basis of the results of the visual and instrumental data analysis and considering the potential threats of danger, on November 27, 2017 at 06:00, the status of G. Agung was changed from Level III (SIAGA) to Level IV (AWAS ). Since yesterday and until today visually the volcano is clearly visible until the appearance of the mist. Gray smoke of medium pressure rises from the crater and reaches an altitude of about 2000 m above the summit, sloping to the southeast, east and northeast. At night, the glow of the incandescent lava in the crater of the volcano is observed. This day, there is no eruptive emission. A tremor event was recorded at 16:42 for 34 minutes.
The seismographs, on December 1, 2017, recorded:
16 shallow volcanic earthquakes (VB)
7 volcanic earthquakes (VA)
No local earthquake
No earthquake of eruption
1 low frequency earthquake
An emission tremor type event
A continuous tremor with an amplitude of 1 to 23 mm and a dominant value of 1 mm.
Recommendations: The communities around G. Agung and climbers / visitors / tourists should not climb and do activities in the danger zone around the crater of G. Agung and in all areas within a radius of 8 km from the crater around the crater of G. Agung. A sectoral extension has been added to the North-North-East and South-East-South-South-West up to 10 km. The estimated area risks are dynamic and continuously assessed and can be modified at any time based on the most recent observational data from G. Agung.
The volcanic activity of Mount Agung and the volume of magma increase.
DECEMBER 2, 2017. The activities of Mount Agung have increased in recent days. The Center for Volcanology and Geological Hazard Mitigation (PVMBG) has re-registered an « off-scale » earthquake of Mount Agung, a manifestation of the continuity of magma supply in the volcanic crater of the 3,144-meter mountain.
« The continuous tremor for 22 minutes from 14:34 to 14:56 (Indonesian central time) indicates that the addition of magma in the crater continues, » said Gede Suantika, head of the Mitigation Center for Volcanology and Mitigation of Geological Hazards, monitoring station of Mount Agung in Rendang. Village, Karangasem, this Saturday (12/02/2017).
He noted that the magma volume of Mount Agung has increased since morning. For the current volume of the crater, he says, about 60,000,000 cubic meters and currently the volume of lava in the crater is estimated at less than 50 percent or 30,000,000 cubic meters.
PVMBG predicts that it would take about 10 days for the magma to completely fill the crater of Mount Agung. « This continuous tremor is happening almost every day, » he said, comparing in the Mt. Agung earthquake of NOVEMBER 28, 2017, with stones that exploded to a 2,000-mile radius. meters from the crater.
At that time, the PVMBG also watched through surveillance cameras at Bukit Asah, indeed there was a splash of solid matter that flew into the air and back down into the crater.
For now, on the impact of the continuous tremor of Mount Agung, there has been no sign of bursting volcanic rock, but just visible thick white smoke. In addition, he added that the very high density of volcanic ash with the continuous flow of lava on the wall of the crater, continues to push out of the wall of the crater. « Today we have a continuing earthquake like November 28, 2017, but the duration is shorter, » he said.
He added that there is a strong relationship between the volcanic activity of Mount Agung and the tectonic activity that previously existed in the village of Abang, which caused an earthquake of 3.5 on the scale of Richter, some time ago. Suantika said that the ongoing activity of Mount Agung tremor is similar to that occurring on the Sinabung mountain, in North Sumatra, where more than five times the same earthquake exceeded the threshold of the seismographic tool.
Meanwhile, Devy Syahbana, chief of the Eastern Region Volcano Mitigation Mitigation Branch of the PVMBG, added that the PVMBG also plans to re-monitor the crater with the help of UAVs. But this will only be done next week, as the UAV is being repaired in Bandung.
Source : VSI , NEWS NETRAL
Misti , Peru :
The seismic activity of the Misti volcano remains low.
Volcano-tectonic (VT) seismic events, associated with rock fractures within the volcanic massif, showed a slight decrease compared to the previous period. The average frequency of this type of event has increased from 58 to 49 events per day. This number is in the « normal » values of the seismic activity of Misti. In addition, the energy of these events remain at low levels.
The activity of long-period (LP) events, associated with the circulation of volcanic fluids, remains very low. During this period, the occurrence of a Tornillo type event was highlighted on the 16th at 01:30 UTC. On the other hand, the activity of volcanic tremor is minimal.
Thermal anomalies: The MIROVA system (www.mirova.unito.it) from the University of Turin (Italy) did not detect thermal anomalies on the Misti volcano for this period (VPR = 0 megawatts).
SO2 anomalies: The GSDM-NASA « EOS Aura » satellite system (http://so2.gsfc.nasa.gov/) did not record any significant SO2 gas (magmatic gas) on Misti volcano.
The volcanic activity of Misti continues to maintain a low level.
VT type seismicity maintains its usual level. During this period, an average of 49 events per day were reported.
Earthquakes associated with the movement of volcanic fluids have not shown much variation; it is necessary to underline the appearance of a event of the type « Tornillo » the 16 at 01:30 (UTC).
Source : IGP
Sinabung , Indonesia :
Leve of activity Level 4 . (AWAS). The Sinabung (2460 m altitude) since yesterday until this morning, has been observed clearly, partially, but generally covered with fog. The smoke emitted from the crater is not observed because the mountain is covered with fog. The wind blows from south to west. By the seismographs it was recorded 3 eruptions / emissions and 55 earthquakes. Visually, the height of the thick ash column was observed at 700 m. The collapse of the lava is also observed up to 500-1000 m, sliding towards the slopes of South, South-East, and East. The eruption is not accompanied by hot clouds.
Communities / visitors should not engage in activities within a radius of 3 km around the summit, and sectorally, in areas 7 km south-southeast, 6 km southeast and 4 km south. East-Northeast.
Ash dumps have formed a dam upstream on the Laborus River and people living in downstream river basins need to maintain vigilance because these dams can collapse at any time and no longer hold back the volume of water, with downstream of lahar / floods.
VOLCANO OBSERVATORY NOTICE FOR AVIATION – VONA.
Issued: December 02, 2017
Volcano: Sinabung (261080)
Current Aviation Color Code: ORANGE
Previous aviation color code: orange
Source: Sinabung Volcano Observatory
Notice Number : 2017SIN656
Location of the volcano: N 03 deg 10 min 12 sec E 98 deg 23 min 31 sec
Region: North Sumatra, Indonesia
Altitude of the summit: 7872 ft (2460 m)
Summary of volcanic activity:
Eruption with ash clouds at 07:39 UTC (14:39 local time). The eruption lasted 231 seconds
Volcanic cloud height:
The ash cloud is not visible.
Other information about the volcanic cloud:
The ash cloud is moving eastward
The seismic activity is characterized by the deep volcanic earthquake, low frequency earthquake and hybrid earthquake.
Source : VSI , Magma .
Photo : Surono Mbah Rono
Reventador , Ecuador :
SATURDAY, DECEMBER 2, 2017
Information from the Institute of Geophysics – EPN
Level of activity:
Superficial trend: No change
Internal trend: no change
Total and type of recorded events:
Long period (LP): 22
Explosions (EXP): 11
Emission Tremor (TE): 5
Rain / lahars: Heavy rains were recorded accompanied by lightning, without causing lahares
Emission column / ash:
At night and early in the morning, steam, gas and ash emissions were observed at a moderate level in the west direction, with heights greater than 600 meters above the summit.
Other monitoring parameters: Unchanged.
During the hours of the night it was possible to see glowing blocks rolling up to 800 meters below the level of the summit, on all flanks. At the moment the area is cloudy
Source : IGEPN