June 09 , 2017. EN. Kilauea , Nevados de Chillan , Poas , Turrialba , Marapi .

Home / blog georges Vitton / June 09 , 2017. EN. Kilauea , Nevados de Chillan , Poas , Turrialba , Marapi .

June 09 , 2017. EN. Kilauea , Nevados de Chillan , Poas , Turrialba , Marapi .

June 09 , 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:
A Magnitude-5.3 earthquake, that occurred just after 7 am this morning about 5 km southwest of Puʻuʻōʻō, had no immediate effect on the eruption. Kīlauea Volcano continues to erupt at its summit in Halemaʻumaʻu and at Puʻuʻōʻō on the East Rift Zone, with no significant change. The summit lava lake was about 24 m (77 ft) below the floor of Halemaʻumaʻu crater when measured this morning. The episode 61g lava flow continues to enter the ocean at Kamokuna. Active surface flows persist above and in the vicinity of the pali southeast of Puʻuʻōʻō. These flows pose no threat to nearby communities. Low rates of ground surface deformation and seismicity continue across the volcano.


View looking southeast along the long axis of the lava lake in Halema‘uma‘u at Kīlauea’s summit. The lava lake is about 260 m (285 yd) long and 200 m (220 yd) wide.

Summit Observations:
Inflationary tilt continued at Kīlauea summit. The lava lake was about 24 m (772 ft) below the rim when measured by laser rangefinder this morning. Generally, low levels of seismicity continue, with amplitudes of volcanic tremor fluctuating with the strength of lava lake spattering. Summit sulfur dioxide emission rates remain high.


Puʻuʻōʻō Observations:
Overflight observations of Puʻuʻōʻō crater on May 31 showed an active lava pond in the west pit, with numerous small spattering sites along the lake margin. Seismicity and deformation at Puʻuʻōʻō have not changed significantly 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.

Lava Flow Observations:
The episode 61g flow remains active and is entering the ocean at Kamokuna. Field observations on May 31 showed the continued growth of the lava delta, which now covers approximately 3.2 acres. A solidified lava ramp extends from the tube exit high on the sea cliff down to the delta, whose leading edge is about 100 m (328 ft) from the tube exit on the sea cliff. Surface breakout activity continues within the 61g flow field above and at the base of the pali southeast of Puʻuʻōʻō. The flows pose no threat to nearby communities at this time.

Source : HVO

Photos : HVO , David Ford , Bruce Omori.


Nevados de Chillan , Chile :

During the period, 1058 seismic events were recorded, 68 of which were classified as volcano – tectonic events, in relation to rock fracturing processes, with maximum local magnitudes of M 3.2. The largest energy event was located 1.2 km north – north – east of the active crater at a depth of 3.2 km. There were also 990 earthquakes associated with fluid dynamics inside the volcanic edifice, 934 of which were cataloged as a long-term event (LP), with maximum displacement values ​​of 111.3 cm2. In addition, 48 earthquakes of the tremor type were recorded, with reduced displacement values ​​of the order of 81.6 cm2. In addition, 8 « Tornillo » (TO) events were recorded in connection with the passage of magmatic and / or hydrothermal fluids inside the volcanic conduits, with characteristics of high impedance contrast, the most energetic event with reduced displacement values ​​of 3.5 cm2.


From 29 to 31 May, intermittent explosions have been recorded, which may suggest the start of a new explosive phase. The recorded pulses have the characteristics of phreato – magmatic explosions. The highest energy explosion was recorded on the morning of 29 May with reduced displacement values ​​(DRC) of 111.3 cm2.

The images obtained by the cameras installed near the volcanic complex showed explosions around the craters, at maximum heights of 1500 m. During the explosions of the morning, it was seen that, on the slopes of the volcano, at over 600 meters, incandescent materials remained more than thirty minutes in certain places of the volcano.
Based on data from five (5) GNSS stations measuring the deformation of the volcano surface, small variations in amplitude were observed in the horizontal and vertical components. The lengths of control lines that cross the volcano have had slight variations, indicating stability in terms of deformation. Data provided by two (2) inclinometers show variations due to changes in the morphology of the complex.
Sulfur dioxide (SO2) emissions recorded by Differential Absorption Spectrometry  ,  Chillan Station (DOAS) located 2.6 km southeast (SE) of the active crater have an average monthly value of 1040 ± 593 t / day, and a maximum daily value of 2374 t / day recorded on 31 May.


No abnormal emissions of sulfur dioxide (SO2) into the atmosphere in the volcanic complex sector have been reported, according to data published by the Ozone Monitoring Group, Sulfur Dioxide Group (OMI) ( Http://so2.gsfc.nasa.gov/) and the National Satellite Data and Information Service (NESDIS) (http://satepsanoine.nesdis.noaa.gov).
No thermal alert was reported in the volcanic complex as a function of the data processed by the Infrared Observation of Volcanic Activity (Mirova) (http://www.mirovaweb.it/).

After a period of calm, there was recorded an explosive episode, currently underway, characterized by weak vulcanian explosions. The recorded parameters suggest a degassing process of a seemingly low volume magma body that could rise slowly and / or cause collapse within the volcanic ducts, producing this pulsating activity in interaction with the surface hydrothermal system. It is possible that this scenario generates similar or even larger explosions.

The volcano Nevados of Chillan is maintained at the Amarillo level, change in volcanic activity.

Source : Sernageomin.

Photos : Sernageomin


Poas , Turrialba , Costa Rica :


Activity report of Poas and Turrialba Volcanoes ,  8 June, 2017, updated at 11:00.

Poas Volcano: Volcanic activity in the last 24 hours
During the last 24 hours, low amplitude tremors, and a series of small LP events of low amplitude have been observed. These are very sporadic. The camera showed a strong continuous degassing with a column of water vapor, gas and magmatic aerosols. But often, the volcano is covered with clouds and / or emissions and visibility are low.
Last night, a smell of sulfur was reported in San Jose, San Ramon and Barva. At night there was an incandescence in the crater, and a column of steam.

Until now, there have been no reported hydrothermal explosions (eruptions).
At the time of this report, the winds at the top of the volcano are variable, but are mainly directed south and southwest.

Turrialba Volcano : volcanic activity in the last 24 hours:

During the last 24 hours, tremors of low amplitude have been observed. There have been a number of small VT-type events and many very distinct LP-type events, but with a small amplitude. The camera showed a strong continuous degassing with a steam column rising to a height of about 500 meters from the bottom of the active crater. But often, the camera is cloud-covered and / or emissions and visibility are low.


L’image contient peut-être : 1 personne, montagne, ciel, nuage, plein air et nature

So far, there has not been or reported a recorded eruption and there have been no reports of ash falls.
At the time of this report, the winds at the top of the volcano are variable, but are mainly directed to the west.

OVSICORI-A remains vigilant on seismic and volcanic activity.

Source : Ovsicori.


Marapi , Indonésia :

Mount Marapi in Padang erupted 53 times.

7 June 2017. Mount Marapi in Padang, West Sumatra erupted again on Tuesday 6 June. The volcano erupted 53 times since Sunday.

The Volcanology and Mitigation Center for Geological Hazards (PVMBG) in Bukittinggi said that on Tuesday, the Marapi erupted five times from midnight to 06:00. Each eruption had an amplitude of 5.0 to 32.0 millimeters. A thick gray smoke could be seen coming out of the crater and rising from 75 to 100 meters.

Then, from noon until the morning, the volcano erupted seven times. After erupting again at 12 o’clock.
Hartanto Prawiro, observer of the PVMBG in Bukit Tinggi said that the activity of the volcano declined Tuesday.

On Monday, the volcano 2,891 meters above sea level erupted 34 times, emitting volcanic ash up to 200 meters high. On Sunday, it erupted only six times, but the ashes emitted reached the height of 700 meters.

Source : Tempo .

Photo : Bukittinggi Tourism

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