October 19 , 2017. EN .  La Palma , Poas , Turrialba , Rincon de la Vieja , Kilauea , Sarychev .

Home / blog georges Vitton / October 19 , 2017. EN .  La Palma , Poas , Turrialba , Rincon de la Vieja , Kilauea , Sarychev .

October 19 , 2017. EN .  La Palma , Poas , Turrialba , Rincon de la Vieja , Kilauea , Sarychev .

October 19 , 2017.

 
La Palma , Canary:

INVOLCAN estimates that the current CO2 emission from the Cumbre Vieja volcano is 788 tonnes per day.
This result is within the range of the background or normal values ​​that have been estimated for this volcano.

Fuencaliente de La Palma – 10/18/2017.

On Monday, 9 October, a scientific team of scientists from the Volcanology Institute of the Canary Islands (Involcan), the Technological Institute of Renewable Energies (ITER) and the Insulating Energy Agency of Tenerife (ATSI) in La Palma with Tuesday 10 October, a new scientific campaign on the diffuse emission of carbon dioxide (CO2) in the atmosphere by the volcano Cumbre Vieja (La Palma, Canary Islands), following the seismic swarm on Saturday 7 October recorded on this volcanic system.
The preliminary results obtained in this new geochemical survey reflect that the current diffuse emission of carbon dioxide (CO2) into the atmosphere by the Cumbre Vieja volcano is 788 tons per day; an emission rate that is within the range of values ​​that may be considered normal for the Cumbre Vieja volcano, ranging from 170 to 1200 tonnes per day.


These diffuse emanations of carbon dioxide (CO2) are silent and dispersed, they are not perceptible by people because they are very weak, they dissolve quickly in the air and are not visible to the human eye; therefore, do not represent a danger to the populations. On the contrary, monitoring of this geochemical parameter is very useful for strengthening the early warning system on volcanological phenomena.
To carry out this campaign, hundreds of in situ measurements of carbon dioxide (CO2) fluxes have been carried out, as well as 1,500 gas samples collected in the atmosphere for further chemical and isotopic analysis. These measurements and gas sampling were carried out on approximately 600 observation points distributed over 220 square kilometers of the area of ​​the volcano Cumbre Vieja, according to criteria of volcanology and accessibility.

Source : Involcan

 

Poas , Turrialba , Rincon de la Vieja , Costa Rica :

Daily report of the state of the volcanos Turrialba, Poás and Rincon de la Vieja.
Updated last 24 hours, issued at 11:30.

Volcan Turrialba
The Turrialba continues with a persistent degassing with a low rate of emission of water vapor, magmatic gases and aerosols. Relatively small amounts of ash propagated sporadically at heights not exceeding 500 meters above the top of the volcano.


The materials emitted were dispersed by winds mainly to the northwestern region of the volcano.
The recorded seismic activity is characterized by a discontinuous volcanic tremor of small amplitude and of short duration and discrete and frequent earthquakes of type LP.

Poas Volcano
The Poas maintains a persistent but very weak fumarolous degassing through the desiccated bottom previously occupied by the hyperacid lake. The plume of water vapor, magmatic gases and aerosols is between 100 and 200 m from the bottom of the crater, and is dispersed mainly to the southwest and west.


Poás seismographs record very low seismic activity generated by nascent fumerol activity and by ambient noise due to external factors.

Rincón de la Vieja Volcano
Between 15 and 16 October 2017, the seismographs of Rincon de la Vieja recorded for almost two days seismic signals of  spasmodic  type of harmonic tremor  character with stationary frequencies and dominant peaks between 1.2 and 2.1 Hz This type of event is associated with the circulation of fluid inside the volcano (water, gas or even magma) that disrupt the hydrothermal system feeding the sources of the lake and water around the volcano.


For most of October 15, and until 7:00 pm on October 16, the time interval between Tremor’s events was about 1 hour, and for the rest of the day on October 16, time interval between Tremor-type events was reduced to about 10 minutes. For the 17th of October, this repetition of this low frequency tremors pattern has not been observed.
Since September 12, 2017, the Rincón began to present volcanic tremors of significant amplitude and fluctuating and variable frequency. Previously, there were several phreatic and phreato-magmatic eruptions between May and October 2017.

The OVSICORI-UNA is vigilant on seismic and volcanic activity.

Source : Ovsicori

 

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 entering the ocean at Kamokuna and producing scattered surface flow activity. These lava flows pose no threat to nearby communities at this time. The height of the lava lake at Kīlauea’s summit changed little over the past day and was last measured at about 40 m (131 ft) below the Overlook crater rim. Low rates of ground deformation and seismic activity persist across the volcano.

Summit Observations:
The lava lake at Kīlauea’s summit continues to be active; its height has not changed much since it was last measured at 40 m (131 ft) below the rim of the Overlook crater on Monday afternoon. No significant change in ground tilt was recorded by summit tiltmeters in the past 24 hours. Measured sulfur dioxide gas emission rates continue to be high and ranged between roughly 2,500 and 5,400 metric tons/day over the past week. Seismicity rates were at normal, background levels, with tremor fluctuations related to lava lake spattering.

Puʻu ʻŌʻō Observations:
In the past day, seismic activity has continued at normal, background rates and no significant ground tilt was recorded by a nearby tiltmeter. Webcams show persistent glow from long-term sources within the crater and from a small lava pond on the west side of the crater. The sulfur dioxide emission rates from the East Rift Zone vents have been steady over the past several months, and remain significantly lower than the summit emissions.

Lava Flow Observations:
Lava from the episode 61g flow continues to enter the ocean at Kamokuna. Webcam views show persistent surface flow activity on the upper portion of the flow field and on the coastal plain, as well as renewed surface flow activity on the pali. At the ocean entry, intermittent lava flows over the cliff and onto the lava delta (« lavafalls ») continue. Surface cracks on the lava delta that had been covered over, are propagating to the surface and beginning to be visible again. The episode 61g flows do not pose a threat to nearby communities at this time.

Source : HVO

 

Sarychev, Matua Island , Russia:

48.092°N, 153.2°E
Elevation 1496 m

A NOAA/NESDIS scientist noted that a thermal anomaly at Sarychev Peak was identified in satellite images on 12 October. Robust thermal anomalies were identified on 14 October, and were accompanied by a plume of unknown composition. Thermal anomalies were also recorded by the MODVOLC and MIROVA thermal detection systems.

Sarychev Peak, one of the most active volcanoes of the Kuril Islands, occupies the NW end of Matua Island in the central Kuriles. The andesitic central cone was constructed within a 3-3.5-km-wide caldera, whose rim is exposed only on the SW side. A dramatic 250-m-wide, very steep-walled crater with a jagged rim caps the volcano. The substantially higher SE rim forms the 1496 m high point of the island. Fresh-looking lava flows, prior to activity in 2009, had descended in all directions, often forming capes along the coast. Much of the lower-angle outer flanks of the volcano are overlain by pyroclastic-flow deposits. Eruptions have been recorded since the 1760s and include both quiet lava effusion and violent explosions. Large eruptions in 1946 and 2009 produced pyroclastic flows that reached the sea.

 

Sources: Hawai’i Institute of Geophysics and Planetology (HIGP) Thermal Alerts Team, Michael J. Pavolonis (NOAA/NESDIS), via the Volcanic Clouds Listserv, MIROVA , GVP.

Photo : eastrussia.ru

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