quote:Update 08/12 – 07:18 UTC- Harmonic tremor subsided to one of the lowest levels since the eruption started on October 10. After a period of very strong bursts who started yesterday at 22:00 a sudden collapse of harmonic tremor occurred at 04:24 UTC early this morning. We expect that the vent has collapsed due to the strong activity since yesterday evening.What will happen now ?–1– As we had almost no earthquakes anymore since many days and as we had only medium harmonic tremor, the chance that the activity was subsiding completely looked real. If this is the case, the earthquakes will not pickup again and the eruption will be over.–2– If the magma is still very active below El Hierro and as it can not find an opening any longer via the vent, the earthquakes will gradually pickup again from now on. The pace that this happens will give a clue to scientists how much power to expect.
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]
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 RestingaThe 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: Op vrijdag 9 december 2011 09:11 schreef bwt het volgende:[..]Niet helemaal duidelijk of het nu infrarood is of niet.[ afbeelding ]
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: What to expect next ? Based on Mr. Armas interview and taking into account a number of uncertainties, Earthquake-Report.com expects that : - if the eruption continues at the present rate and in the same vent, it will take max. 2 weeks to arrive at a depth less than 100 meter. We than expect very strong Jacuzzis during the hydromagmatic bursts. - if the same process continues for about 3 to 4 weeks and in the same vent we expect regular hydrovolcanic explosions during the bursts. - if the same process goes on 5 to 6 weeks the eruption may become Surtseyan. This is the most spectacular phase of the eruption. During this phase of the eruption ash and steam clouds can reach hundreds of meters to several km in height. Particular to Surtseyan eruptions are the thick,dark-pointed jets of fragments, often headed by bombs, shot out of the vent. - if the same process goes on 7 to 8 weeks and in the same vent, the eruption will have created at least a new island - the main vent is at a safe distance from La Restinga, so we do not see immediate danger for the population. 90% of the time the wind blows from the north or north east at this time of the year and accordingly the eventual ash will be blown further in the Las Calmas sea, avoiding damage at La Restinga.. - If a new island forms, it may indicate several months of uncertainty for the La Restinga population as nobody knows how long the eruption will last and when it will finally stop for a longer time as there may be several new eruptive periods. Our expectation is based on medium harmonic tremor like we had the last couple of days. In case of strong or very strong harmonic tremor the time to get to these different phases may well be a lot shorter. If our expectations are coming true, the eruption will make El Hierro appearing in every news show in the world. The island will start to attract visitors from all over the world.
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
quote: Op zaterdag 10 december 2011 13:13 schreef bwt het volgende:[..]Maar dan moet je wel gaan eiland hoppen met vliegtuig of boot.Vanaf tenerife zul je er niets van merken/zien