[aktueel] Vulkaanuitbarsting bij Canarische Eilanden #3

quote:

The volcano of La Restinga eject large rocks again

The volcano has returned to La Restinga eject large chunks of solidified lava. The focus cameras 24 hours a bubbling area captured from the first morning, however, "were no more than 20 or 30 rocks" that emerged, says a spokeswoman for the National Geographic Institute (IGN), Carmen Lopez .

A IGN researchers did not give time to collect samples because they could not approach the area due to the strong prevailing wind and the rocks sank quickly, its large size. Carmen Lopez and IGN technicians arrived near the eruptive Salvamar aboard and found that washes out "smoking" in the midst of a "much bubbling" by the emission of "greenhouse and very fine and dense material."

The expulsion of solid material lasted less than two hours. At the moment only seen a bubble in the focal zone eruption.

La Restinga, El Hierro 1st December 2011 8:00 am - 9:30 am

quote:

Graphic which aims to present each day as if there had been an earthquake and the earthquake alone would be equivalent to the sum of the rest of earthquakes a day.
This is to compare the energy released (presented as magnitude), with the average depth of daily events, the average magnitude of the events and the number of events have occurred in the day.
To calculate the average depth, it is weighted by the energy released by each event. (JR)

[bron]

quote:

NOTE AVCAN 362 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - DECEMBER 04 2011-22:00 h peninsular - seismic-volcanic activity continues to moderate, with seismicity in the del Golfo marine area. Continue an important sign of volcanic tremor in the Restinga area, with an amplitude which remained stable since the last, least the last 2 hours starting at 7:50 p.m. or so where it has doubled in intensity by a possible jam in the pipe and swings and more explosions, possibly hydromagmatic. The magnitude of the earthquake only 1.4. New earthquakes 1. Depths at 17km. Before yesterday 5. Yesterday 3. Today van 2. A total of 11,909 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).
[bron]

quote:

The diffuse emission of CO2 by the volcanic system of El Hierro island falls under the INVOLCAN

This downward trend since late November until now arriving at 1560 � 59 tonnes per day

Since last July, scientists at the Institute of Technology and Renewable Energies (ITER), an agency of the Cabildo of Tenerife, and is now part of volcanological Institute of the Canaries (INVOLCAN) have conducted numerous scientific surveys of diffuse emissions volcanic gases that have materialized over the entire surface of the island of Isla Meridian. The results show a downward trend in the diffuse emission of carbon dioxide (CO2) into the atmosphere by the volcano island of El Hierro since late November, when it came to achieving the 2398 � 115 tons per day, up to now been recorded an emission rate of 1,560 � 59 tonnes per day.

This record to the bottom of the diffuse emission of carbon dioxide (CO2) in turn implies that the pressure of carbon dioxide (CO2) in volcanic-magmatic system existing in the hydrothermal-island of El Hierro should not continue to grow as well it might be inferred during the observation period was experiencing an increase in the diffuse emission of carbon dioxide (CO2).

The scientific purpose of these campaigns is to investigate spatio-temporal variations of the diffuse emission of carbon dioxide (CO2) into the atmosphere by the volcanic system of El Hierro island since the results thereof can not be obtained through networks permanent instrumental analysis contribute to the evolution of the current eruptive phase is occurring in El Hierro. On the other hand, it is widely accepted that the gases are the driving force of volcanic eruptions and monitoring of carbon dioxide (CO2) in volcanic surveillance programs is very important because not only is the second major component of volcanic gases after water vapor, but also because of its low solubility in molten silicitados (magma) favoring the carbon dioxide (CO2) to escape with their ease of volcanic systems in depth.

These scientific surveys have failed to materialize due to MAKAVOL project "Capacity Building of R + D + i + d to contribute to the reduction of volcanic risk in the Macaronesia (MAC/3/C161)" which is being co-funded by the Transnational Cooperation Programme of the European Union Madeira-Canary-Azores (MAC 2007-2013) and the collaboration of the Island Councils of Tenerife and El Hierro.

INVOLCAN is an institution demanded unanimously by the Senate (2005), Parliament of the Canary Islands (2006) and House of Representatives (2009) with the aim of contributing to improving and optimizing the management of volcanic risk in Spain.


Picture Pie
Temporal evolution of the diffuse emission of carbon dioxide (CO2) in the island of El Hierro (red circles) recorded by the non-tip and the daily number of earthquakes located by the National Seismic Network (IGN).
[bron]

quote:

The Involcan shows a decrease in the diffuse emission of CO2 by the volcanic system


Scientists at the Institute of Technology and Renewable Energies (ITER), an agency of the Cabildo of Tenerife, and is now part of volcanological Institute of the Canaries (Involcan), indicate a downward trend of the diffuse emission of carbon dioxide (CO2) into the atmosphere by the volcano island of El Hierro since late November, when it came to achieving the 2398 � 115 tons per day, up to now been recorded an emission rate of 1,560 � 59 tonnes per day.
This record to the bottom of the diffuse emission of CO2 in turn implies that the pressure of CO2 in the system magmatic-hydrothermal volcanic-existing in the island "should not continue to grow as well it might be inferred during the period of observation was experiencing an increase in the diffuse emission of CO2. "

The Involcan said in a statement that the purpose of these campaigns is to investigate scientific spatiotemporal variations of the diffuse emission of carbon dioxide into the atmosphere by the volcanic system since the results can not be obtained through permanent instrumental network developments contribute to the analysis of the current eruptive phase is occurring in El Hierro.
[bron]

quote:

Spains National Geological Institute (IGN) Scientists, observing seismic and volcanic activity on the Canary Island of El Hierro have recorded just 2 earthquakes over the course of the last 24 Hours (14.00 hrs Tuesday - 14.00 hrs GMT Wednesday).

Activity has fallen considerably over the last week, with Earthquakes numbering between 2 and 4 per week, compared with an average of 12 per day around one month ago.

As in previous days and weeks, these two Earthquakes took place in and around the El Golfo bay area, off the coast of Frontera to the north of the Island. The Magnitudes recorded registered 1.6 and 1.9 on the richter scale, at depths of 23km and 15km respectively.

Meanwhile, scientists observing the underwater Volcanic eruptions in the Las Calmas bay area, off the coast of La Restinga on the south of the island have told PEVOLCA that the temperature of the sea around the `jacuzzi is beginning to stabilize. Temperatures peaked on the 6th of November with a maximum recording of 30.9 Degrees, but have now returned to an average of 21.3 Degrees.
[bron]

VUELO CIENTÍFICO INVOLCAN - GC 291111 - VOLCÁN SUBMARINO DEL HIERRO - SARMIENTO DE GAMBOA - PANCAM

quote:

NOTE AVCAN 369 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - DECEMBER 08 2011-12:00 h peninsular - seismic-volcanic activity continues to moderate, with seismicity in the Gulf marine area. Continue an important sign of volcanic tremor in the Restinga area, with high amplitude, unstable and some explosions, possibly even at 04:30 h hydromagmatic where under almost minimum and since then tends to rise and become unstable again. Today has been smoldering pyroclastic output from early in the morning. The magnitude of the earthquake only 1.8. New earthquakes 1. Depth to 22 km. Before yesterday 2. Yesterday 2. Today they 1. A total of 11,919 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).
[bron]

quote:

Slightly increase the tremor and the stain of La Restinga

The National Geographic Institute (IGN) has confirmed the Civil Protection Plan for Volcanic Risk (Pevolca) yesterday only two earthquakes were located in the area of the Gulf, northwest of La Frontera, with magnitudes of 1.9 and 1.6 on the Richter scale at a depth of 15 and 17 kilometers respectively. None of them was felt by the population. In total, since the day July 17, 2011 11 926 events have been found.
According to IGN, the level of tremor increased in amplitude around 22:00 hours, at which time there was a greater pulse length. Since then remained stable at a level slightly higher than the beginning of the day. As for the studies of ground deformation during the day yesterday continued the same pattern of distortion of previous days, reflecting stability in the components horizontal and vertical component deflation of all stations in the south and east of the island regard to the stain of La Restinga, it is noteworthy that there was an episodic emission steaming lava fragments, but of much less importance than the previous day . IGN adds that the vessel 'Adhara' Maritime Rescue attempted to collect samples but it was not possible due to the remoteness of the area in the emerging area with clean water surface. The spot had a large area throughout the day.

quote:

NOTE AVCAN 370 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - DECEMBER 08 2011-23:00 h peninsular - seismic-volcanic activity continues to moderate. Continue an important sign of volcanic tremor in the Restinga area, with high amplitude, unstable and some explosions, possibly even at 04:30 h hydromagmatic where under almost to a minimum and since then tends to rise and become unstable again, making more consistent in the last hours. Today has been smoldering pyroclastic output from early in the morning. No new earthquakes today at Hierro and vicinity. Before yesterday 2. Yesterday 2. Today they 1. A total of 11,919 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

quote:

NOTE AVCAN 371 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - DECEMBER 09 2011-09:00 h peninsular - seismic-volcanic activity continues to moderate, with seismicity in the Gulf marine area. Continue an important sign of volcanic tremor in the Restinga area, with an amplitude that remains slightly higher and slightly unstable and some explosions, possibly hydromagmatic. The magnitude of the earthquakes between 2.0 and 1.8 New earthquakes 2. Depths to 21 and 23km. Before yesterday 2. Yesterday 2. Today they 1. A total of 11,921 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

quote:

Op zaterdag 10 december 2011 13:08 schreef Asphalt het volgende:
In januari ga ik een weekje naar Tenerife, vandaar uit een dagje naar El Hierro met de veerboot.
Genoeg te zien tegen die tijd als ik de post hierboven moet geloven