June 14 , 2017. EN. Kilauea , Bogoslof , Villarica , Tenerife .

Home / Alaska / June 14 , 2017. EN. Kilauea , Bogoslof , Villarica , Tenerife .

June 14 , 2017. EN. Kilauea , Bogoslof , Villarica , Tenerife .

June 14 , 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:
No significant change. Eruptions continues at Kīlauea Volcano’s summit in Halemaʻumaʻu and on the East Rift Zone at Puʻuʻōʻō. The summit lava lake has risen overnight and this morning is about 13 m (43 ft) below the floor of Halemaʻumaʻu. The episode 61g lava flow continues to enter the ocean at Kamokuna. Surface lava flows are active above and on the pali southeast of Puʻuʻōʻō. These flows pose no threat to nearby communities. Low rates of ground deformation and seismicity continue across the volcano.

 

L’image contient peut-être : nuage, océan, ciel, eau, montagne, plein air et nature

Summit Observations:
After more than 48 hours of steady inflation, deflationary tilt began early this morning. Since yesterday, the lava lake has risen; this morning, the lake surface is about about 13 m (43 ft) below the rim of Halemaʻumaʻu. For current web camera views of the summit lava lake, see: https://volcanoes.usgs.gov/volcanoes/kilauea/multimedia_webcams.html. Generally low levels of seismicity continue in the summit region. Volcanic tremor amplitude fluctuates with the vigor of lava lake spattering. Summit sulfur dioxide emission rates remain high.

L’image contient peut-être : ciel, nuage et plein air

Puʻuʻōʻō Observations: ( Photo above)
Web camera views, seismicity, and deformation indicate no major changes at Puʻuʻōʻō in the last 24 hours. 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.

L’image contient peut-être : feu et plein air

Lava Flow Observations:
The episode 61g flow remains active and is entering the ocean at Kamokuna. As of May 31, the new lava delta was approximately 3.2 acres in size, extending about 100 m (328 ft) out from the sea cliff. A solid lava ramp has formed around the stream of lava reaching the growing delta. See the HVO web site for images. Based on clear, moonlit web camera views overnight, surface breakout activity continues within the 61g flow field southeast of Puʻuʻōʻō and above and on the pali. The lava flows pose no threat to nearby communities at this time.

Source : HVO

Photos : Bruce Omori , David Ford.

 

Bogoslof , Alaska :

53°55’38 » N 168°2’4″ W,
Summit Elevation 492 ft (150 m)
Current Volcano Alert Level: WARNING
Current Aviation Color Code: RED

The explosive eruptive activity that began tonight at 1:47 UTC June 13 (17:47 AKDT June 12) has ended or has paused. This sequence thus far is characterized by a series of explosive events lasting 10-30 minutes long, emitting volcanic clouds that rose to a maximum height of 25,000 ft asl, and dissipated within about 30 minutes. The last major pulse of explosive activity ended at 04:35 UTC June 13 (20:35 AKDT June 12). Bogoslof volcano remains at a heightened state of unrest and in an unpredictable condition. Additional explosions producing high-altitude volcanic clouds could occur at any time.

The Aviation Color Code remains at RED and the Alert Level remains at WARNING. AVO will continue to monitor the volcano using all available data streams.

 

Issued: Tuesday, June 13, 2017, 8:48 AM AKDT

Volcanic Activity Summary:
A six-minute-long explosion was detected in seismic and infrasound data at 8:17 AKDT (16:17 UTC). There have been no satellite images of a resulting volcanic cloud, and its height is currently unknown. Lower level winds are currently to the northwest, and higher level winds to the southeast, over southern Unalaska Island.

The Aviation Color Code remains at RED and Volcano Alert Level at WARNING.

Tuesday, June 13, 2017, 2:00 PM AKDT (Tuesday, June 13, 2017, 22:00 UTC)

Last night a series of five explosive eruptions started at 17:47 AKDT June 12 (01:47 UCT June 13) and ended about 20:35 AKDT June 12 (04:35 UTC June 13). These events each lasted between 10 and 30 minutes and generated volcanic clouds that rose to a maximum height of 25,000 feet above sea level and dissipated within about 30 minutes. This sequence was detected in seismic, infrasound, and satellite data and a single lightning stoke was recorded. The Aviation Color Code was increased to RED and the Alert Level was raised to WARNING. This morning at at 8:17 AKDT (16:17 UTC) another short-duration (6-minute) explosion was detected in seismic and infrasound data. No ash cloud was observed in satellite imagery from this event likely because it was below our detection limits. The National Weather Service Alaska Aviation Weather Unit did not issue a SIGMET for this morning’s event.

 

Earlier today, the Volcano Alert Level was lowered to WATCH, and the Aviation Color Code was lowered to ORANGE. Activity may ramp back up with additional explosions, either small and short-lived or longer and more voluminous, occurring with little or no precursory activity. Although we are able to detect energetic explosive activity in real-time, there is typically a lag of tens of minutes until we can characterize the magnitude of the event and the altitude of the volcanic cloud.

In addition to explosions that we can detect from nearby islands, It is possible for low-level unrest, including explosive activity, to occur that we are unable to detect with existing data sources. Such low-level periods of unrest and possible explosions could pose a hazard in the immediate vicinity of the volcano. During the day yesterday and prior to the evening’s explosive activity, residents of Unalaska/Dutch Harbor reported smelling sulfur, and winds were consistent with a source at Bogoslof. This suggests ongoing degassing of shallow magma at the volcano.

Source : AVO.

Photos : AVO

 

Villarica , Chile :

Summary of the activity of the Villarica volcano, May 2017.

A total of 30 images were captured.
Between May 1st and 28th, the level of the crater, composed of a solidified lava crust, decreased slightly.
On May 15 at 1:44 pm, the cameras recorded a small plume of volcanic dust that was allegedly caused by a landslide in the crater.

 


On 18/19 May, a sudden increase in explosive energy, which coincided with greater satellite radiation detected by radiation and an increase in incandescence recorded by the cameras (see graph), was observed.
Produced from a new phase of subsidence (damping), between 26 and 28 May, the inner walls of the crater began to collapse, progressively increasing the diameter of the crater by more than 20 meters.

L’image contient peut-être : plein air et nature
On 3 and 26 May, pyroclastic lapillis (diameter 2-64 mm) were found on the perimeter of the crater.
According to the records of our seismic station, the unusual volcano-tectonic earthquake of March 31 (M 3.9) impacted the seismic energy released by stabilizing the tremor in the following months. However, it should be noted that the average seismic energy released in May 2017 is higher than that released in May 2016.


Source :
Werner Keller , P.O.V.I.

Photo : Miguel Angel Albornoz.

 

Tenerife, Canary Islands, Spain:

Report on the seismicity on Tenerife and its surroundings between 8 and 11 June 2017.

Between Thursday 8 and Sunday 11 June 2017, the Canaria Seismic Network recorded an increase in volcano-tectonic seismicity on Tenerife and its surroundings. On Thursday 8 June was recorded at least 10 earthquakes, it was possible to locate the hypocenter of 8 of them under the Teide, at depths of 9-15 km and a maximum magnitude of M1, 3.

The next day, Friday, June 9, it was at least 15 earthquakes in the space of a few hours, between 2:36 and 4:07 UTC. In this second seismic sequence, the hypocenters of 8 seismic events were located at depths between 8 and 14 km, with a maximum amplitude of M1,4, with an epicentral zone similar to that of 8 June. Seismic events recorded on 9 June show the typical characteristics of seismic swarms in hydrothermal volcanic zones, consisting of a small volcano-tectonic sequence of events, whose waveforms often overlap, making it difficult to distinguish particular events.

 

At least four other seismic events with similar characteristics were recorded on June 11 from 5:10 to 7:32 UTC. On June 10 another small seismic sequence was recorded from 2:21 to 6:32 UTC. However, in this case, the hypocenter was located 10-25 km north of Icod de Los Vinos and at depths of 15-25 km.

Although these seismic events do not have singularly abnormal characteristics, the recording is significant in relation to number and energy. In particular, the events of 8, 9 and 11 June in the Teide area have released seismic energy of 1.2×10 ^ 6 J. The mean value of the seismic energy released each year in the same zone, excluding the volcanic seismic crisis of 2004 and the earthquake of 06.01.2017 with M = 2.5, is equal to 1.4×10 ^ 6 J.

 

Thus, the seismic sequence released in about three days about 86% of the average energy in the same zone.
Similarly, considering that the sequence of 10 June 2017, which released an energy of 8.7×10 ^ 7 J and that energy throughout the Tenerife area the previous year was 1.4 x 10 8 J , it can be said that this seismic sequence released 62% of the energy compared to that released in the whole of the previous year. The map shows the events: in black, those recorded last year in Tenerife and surroundings, in red events located in the Teide area between 8 and 11 June and in green, events located north of Icod de Los Vinos the 10th of June.

Note:
Events in the Teide region in recent days reflect a process of pressurizing the volcanic hydrothermal system likely associated with the injection of magmatic gases into the system. This process is particularly evident by the observation of the increase in diffuse CO2 emissions in the Teide crater from November 2016, published by monthly bulletins of Involcan (http://www.involcan.org/ ).

The interpretation of the events of June 10 will require further analysis to establish their possible relationship with the current volcanic dynamics of Tenerife.

Source : Institut volcanologique des Canaries .

Photos : Summitpost , You Tube .

 

 

 

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