December 22 , 2017. EN. Kilauea , Klyuchevskoy , Villarica , Popocatepetl.

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December 22 , 2017. EN. Kilauea , Klyuchevskoy , Villarica , Popocatepetl.

December 22 , 2017.

 

Kilauea , Hawai :

19°25’16 » N 155°17’13 » W,
Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Activity Summary:
Kīlauea Volcano continues to erupt at its summit and from the Puʻu ʻŌʻō vent on its East Rift Zone. The episode 61g lava flow is still producing scattered surface flow activity. No lava is entering the ocean at this time. Active lava flows pose no threat to nearby communities at this time. The surface of the lava lake at Kīlauea’s summit was 36 m (118 ft) below the floor of Halemaʻumaʻu crater when measured this morning. Deflationary tilt began at the summit early this morning.

 


An image from a Halema‘uma‘u time-lapse camera taken on December 5 at 4:41 am, just after the collapse. The portion of the rim that fell into the Halema‘uma‘u lava lake triggered intense spattering on the lake margin where the material impacted the lake. The collapse also agitated the entire surface of the lava lake, breaking up the crustal plates into many small ones.

Summit Observations:
The lava lake surface was measured at 36 m (118 ft) below the rim of the Overlook Vent this morning. Early this morning, summit tiltmeters recorded a reversal from inflationary to deflationary tilt. Summit sulfur dioxide emission rates remain high. Seismicity rates were at normal, background levels, with tremor fluctuations related to lava lake spattering.

Puʻu ʻŌʻō Observations:
No significant changes are evident at Puʻu ʻŌʻō. Glow has been persistent at long-term sources within the crater and from a small lava pond on the west side of the crater. The tiltmeter on Puʻu ʻŌʻō cone recorded slight inflationary tilt over the past day. The sulfur dioxide emission rate from the East Rift Zone vents has been steady over the past several months and remains significantly lower than the summit emission rate.

 


Today was sunny and clear, providing views of Mauna Loa (background), the Halema‘uma‘u summit plume from Kīlauea’s summit (center, at the base of Mauna Loa), and the ongoing Pu‘u ‘Ō‘ō eruption site, which hosts a lava pond west of the main crater.

Lava Flow Observations:
The episode 61g flow is still active. Based on overnight web camera images, surface lava flow activity persists on the upper portion of the flow field, on the pali and in scattered areas along the coastal plain. A new breakout came over the pali Monday morning and continues. These lava flows pose no threat to nearby communities at this time. The ocean entry has been inactive since late November.

Source : HVO.

 

Klyuchevskoy , Kamchatka :

VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA).

Issued: December 22 , 2017
Volcano: Klyuchevskoy (CAVW #300260)
Current aviation colour code: ORANGE
Previous aviation colour code: orange
Source: KVERT
Notice Number: 2017-271
Volcano Location: N 56 deg 3 min E 160 deg 38 min
Area: Kamchatka, Russia
Summit Elevation: 15580 ft (4750 m)

 

Volcanic Activity Summary: Ash emission of the volcano continues. Ash plume containing some amount of ash is drifting about 68 km to the east from the volcano.
A moderate eruptive activity of the volcano continues. Ongoing activity could affect low-flying aircraft.

Volcanic cloud height: 19680-22960 ft (6000-7000 m) AMSL Time and method of ash plume/cloud height determination: 20171221/0416Z – NOAA 19 (4m5)
Other volcanic cloud information: Distance of ash plume/cloud of the volcano: 42 mi (68 km)
Direction of drift of ash plume/cloud of the volcano: E / azimuth 95 deg
Time and method of ash plume/cloud determination: 20171221/0416Z – NOAA 19 (4m5

 

Source : Kvert.

Photo : Yu. Demyanchuk, IVS FEB RAS, KVERT ( 03/12/2017.)
 

Villarica , Chile :

A total of 6,376 seismic events have been recorded, of which 6,118 have been classified as long-lived earthquakes (LPs) in relation to fluid dynamics within the volcano, and reduced displacement values ​​(DRCs) to a maximum of at 13 cm2. In addition, 258 earthquakes of the volcano-tectonic (VT) type associated with rock fracturing were classified. The largest energy event had a local magnitude of M 2.7, located 8.2 km east-southeast of the crater, and 3.6 km deep.

The series of volcanic earthquakes, a seismic series also associated with fluid dynamics within the volcano, during the early days of the period considered continued with an upward trend that was reported in the 20171205 REAL, reaching a maximum value of 16 cm2. From December 8 this signal decreased in amplitude, reaching values ​​of 5 cm2 (average value) which are currently maintained. On the other hand, the dominant frequencies have been maintained at values ​​between 1.0 and 2.1 Hz.

 

Images recorded with IP cameras installed near the volcano, when weather conditions permitted, exhibited less intense degassing, predominantly whitish, not exceeding 650 m in height. In addition, nocturnal glow is recorded, sometimes associated with minor explosions at the crater level.
The infrasound sensor recorded minor explosions associated with the surface activity of the lava lake housed in the main crater. The maximum calculated value was 7 pascals reduced (value considered moderate).
According to data provided by five (5) GNSS stations and two (2) electronic inclinometers, no significant changes were detected due to changes in the internal activity of the volcano during the reported period.
Thanks to the InSAR radar interferometry imagery, between 06 and 30 November, no deformation due to the volcano is observed.
No emissions of sulfur dioxide (SO2) to the atmosphere in the volcano area have been reported, according to data published by the Ozone Monitoring Instrument (OMI) Sulfur Dioxide Group (http: //so2.gsfc.nasa.gov/) and the National Environmental Satellite Information and Data Service (NESDIS) (http://satepsanoine.nesdis.noaa.gov).

Villarrica Volcano – December 18

The photo-interpretation reveals that the bottom of the crater, which contained the active lava of the lake, has descended more than 45 meters since December 5. Almost simultaneously, tremor and seismicity noise has decreased to the lowest levels since winter 2016 (source: POVI seismograph).

During this period an increase in the number and intensity of thermal warnings in the associated volcanic zone, with a volcanic radiative power (VRP) observed at a maximum of 82 MW on 04 December, has been reported, which is considered high, according to average infrared data processed Observation of volcanic activity (Mirova) (http://www.mirovaweb.it/).
The monitoring of the parameters obtained for the volcano showed significant changes since the second half of November, with visually the manifestation of an intense surface activity during the first days of this month, although in the last period, these parameters have decreased quantitatively and qualitatively. This suggests that the lava lake is at depths greater than those reported at the beginning of the month, so the risk of a sharp increase in activity is maintained:
The volcanic alert is maintained with particular attention at the level:
YELLOW LEVEL: Changes in the behavior of volcanic activity – Probable time for an eruption: WEEKS / MONTH.

Note: It is recommended to apply precautionary access restrictions in an area close to the crater with a radius of 1000 m.

Source : Sernageomin, Werner Keller ( POVI)

 

Popocatepetl , Mexico :

December 21, 11:00 h (December 21, 17:00 GMT)

In the last 24 hours, through the monitoring systems of the Popocatépetl volcano, 191 low intensity exhalations were identified, with water vapor, gas and light amounts of ash .
During the night it was observed for instants incandescence over the crater .

At the time of this report, there is a slight emission of water vapor and other gases that the wind disperses towards the north-northeast . The other monitoring parameters remain without relevant changes.

CENAPRED urges NOT TO APPROACH the volcano and above all the crater, due to the danger of the fall of ballistic fragments , and in case of heavy rains to get away from the bottoms of ravines due to the risk of landslides and mudflows.

The Popocatepetl Volcanic Alert Traffic Light is located in Amarillo Phase 2.

 

Source : Cenapred.

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