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Showing posts with label Canary Island Earthquakes. Show all posts
Showing posts with label Canary Island Earthquakes. Show all posts

Saturday, March 23, 2013

Canary Islands, El Hierro Waking up, Increasing


Seismic unrest at El Hierro Island (Canary Islands) in 2011-13: updates


Earthquakes increasing in frequency and magnitude
Update Sat 23 Mar 22:44
Current tremor signal (IGN)
Current tremor signal (IGN)
Depth vs time of today's quakes under El Hierro
Depth vs time of today's quakes under El Hierro
The seismic swarm continues with even increasing intensity, as to both the average magnitude and frequency of earthquakes, as well as amplitude of harmonic volcanic tremor which is oscillating between higher and lower phases. This might correspond to some sort of "stop and go" behavior of magma moving its way through new cracks in the lower crust beneath the island. The location of the epicenters of quakes, the presumed location of the current magma intrusions, is now about 5 km NW of the western tip of the island, and at depths between 10-17 km. No strong upwards trend is yet visible, but this could change quickly. 
Today's earthquake count so far: 
- 155 earthquakes > mag 2 
- including 15 between M3-3.5

Earthquakes continue with increasing magnitudes
Update Sat 23 Mar 16:41

Map of recent earthquakes at El Hierro (IGN)
Map of recent earthquakes at El Hierro (IGN)
Current tremor signal (IGN)
Current tremor signal (IGN)
Deformation measured at GPS stations 3-5 (in the western part of the island)
Deformation measured at GPS stations 3-5 (in the western part of the island)
The scenario of an eruption in the near future is becoming increasingly likely: 
- Volcanic tremor continues, suggesting magma is still moving although mostly laterally for the time being to an area just north off the western tip of the island. 
- Earthquakes continue at high frequency and increasing magnitudes (more than 90 quakes above magnitude 2, including 8 of magnitudes 3-3.5 so far today). Their epicenters have remained at 14-16 km depth mostly, with some shallower events as well. 
- Deformation of the western part of the island continues to increase, with vertical uplift reaching about 5 cm on some stations in the westernmost part of the island. 
The Spanish research vessel Roman Margaleff is on its way to investigate the area offshore western El Hierro, and INVOLCAN is planning a field survey in the coming days. Their results will likely give more clues about what is going on

.

Update Fri 22 Mar 17:16
Earthquakes and tremor have continued through the day, and continued to migrate a bit to the NW off the NW tip of the island. So far, 62 quakes above magnitude 2 have been recorded today. 
In addition, the average depth of the latest earthquakes has become a bit shallower and is now around 13 km (compared to 17-20 km before). This suggests that magma is still moving and has risen a bit closer to the surface, and, thus, a possible eruption.
Map of today's earthquakes at El Hierro
Map of today's earthquakes at El Hierro
Current tremor signal (IGN)
Current tremor signal (IGN)


Also see:
http://globalrumblings.blogspot.com/2013/03/media-meteor-mania-sightings.html




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Sunday, February 26, 2012

Heads up - El Hierro Activity, Canary Islands Volcano



El Hierro Submarine Volcano Eruption
Four months after it began, the underwater volcanic eruption off El Hierro Island persists. This natural-color satellite image, collected on February 10, 2012, shows the site of the eruption, near the fishing village of La Restinga.
Bright aquamarine water indicates high concentrations of volcanic material. Immediately above the vent, a patch of brown water resembles a turbulent hot tub and indicates when and where the eruption is strongest.Video of the eruption shows the activity in more detail.
This image was acquired by the Advanced Land Imager (ALI) aboard the Earth Observing-1 (EO-1) satellite. The eruption is just off the southern coast of El Hierro, the youngest of the Canary Islands. El Hierro is about 460 kilometers (290 miles) west of Morocco and Western Sahara.
According to El Hierro Digital, measurements of the sea floor by the Instituto Oceanográfico Español found that the volcano’s summit is now only 120 meters (390 feet) beneath the ocean surface—10 meters (30 feet) higher than it was in mid-January. The height of the erupting cone is about 210 meters (690 feet) above the former ocean bottom, with a total volume over 145 million cubic meters (5.12 billion cubic feet) of new material.
  1. References

  2. El Hierro Digital. (2012, February 14). El IEO ha establecido la profundidad de la cima del cono principal de la erupción submarina en 120 metros Accessed February 14, 2012.
  3. Instituto Oceanográfico Español. (2012, January 20). El cono volcánico de El Hierro se encuentra a unos 130 metros de profundidad. Accessed February 14, 2012.
NASA Earth Observatory image by Jesse Allen and Robert Simmon, using EO-1 ALI data. Caption by Robert Simmon.






Depths are averaging 6-7 miles deep for the Quakes..  There's a CLEAR Reactivation of the Volcanic activity.. Some of the quakes are happening below the island...


According to Ann Morrison, when the quakes average less than 5 miles deep, our antennas really need to go up....




SHELDON


February 26 2012 News update 


The La Restinga vent has been barely active over the last few days. The odd jacuzzi of bubbles and about half a dozen earthquakes per day. Is this the beginning of the end, or a lull before a new bout of activity?


February 19 2012 News update 


Six earthquakes so far today, but no harmonic tremor at all and no visible stain. There were over 20 quakes yesterday.


February 17 2012 News update 


14.32: A 2.5 quake at 13.16 is the strongest today so far, out of a total of 11. There is a strong smell of sulphur close to the vent! Currently the Atlantic Explorer research vessel is over the vent, taking samples and recording data. The harmonic tremor is still weak, suggesting that the vent is still .


February 16 2012 News update 


16 earthquakes so far today, trending shallower. There was a visible stain earlier on but it has faded, along with the harmonic tremor. The pressure is building again, and if the quakes keep getting closer to the surface, we can expect a new eruption. Could be in the sea by La Restinga, or anywhere else in the ocean, or even on the island of El Hierro. 


Video
Contributing Sources:Alex Bramwell Blog

Earth Observatory NASA



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Nov 23, 2011
Fortunately it is not erupting under La Palma Island (la Cumbre Vieja formation) but El Hierro not that far away. So the situation is not good. The problem with the deeper quake activity is that the old cracks and stress lines that ...
Dec 18, 2011
... at this weak magnitude) and that she did not smell any special odor. 2 shallow earthquakes on December 17 2011 may have been the end of the eruption at El Hierro. Source, older reports, pictures: The Earthquake Report ...
Dec 06, 2011
Remember, once we get a continuous depth of 5 miles or less, WATCH OUT EAST COAST !!!! Data Update 27/11 – 23:50 - A total of 16 earthquakes today - Only 6 earthquakes were M 1.5 or greater - the extremely shallow El ...
Nov 14, 2011
El Hierro, Canary Islands, until November 15, 2011, midnight EST. EVENT: There is now an increased chance of eruption in the North of El Hierro. Co2 has reached 1481 + / - 37 tonnes per day, an amount equivalent to 4.35 ...


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Friday, December 30, 2011

Government Urged: Hold climate change summit now



Friday, December 30, 2011
ALARMED by climate projections in the coming years, a lawmaker strongly pushed for the immediate holding of a summit to map out plan of actions that would mitigate catastrophic effects of climate change to the country and the people.


Isabela Representative Rodolfo Albano said the grievousness of the situation calls for serious action not only on the part of the government but of all sectors of society as well.
“We are now suffering the brunt of climate change.  Our wet season becomes wetter, our dry season becomes drier and there are even typhoons during summertime.  Worse, hundreds of people die, thousands more get dislocated and properties are destroyed,” Albano said.

The senior legislator made the recommendation as calamity victims in Northern Mindanao try to recover from the massive destruction brought by Tropical Storm “Sendong” (international codename: Washi).

In the latest report released by the National Disaster Risk Reduction and Management Council (NDRRMC) on Friday, deaths caused by Sendong have reached 1,257 while 85 others remain missing.
Albano also took note of the devastation brought by Typhoons Quiel and Pedring in several regions in Luzon, including the National Capital Region.

He warned that hundreds more could die, thousands upon thousands would get displaced and billion-peso worth of properties would be shattered if the government would not take action immediately.

“Now is the time for the National Government, concerned government agencies, local governments and all sectors to sit down together, assess the situation, study projections and plan out actions to lessen the impact of the worsening climate change.  We have to do this now to prepare for the worst that is yet to come,” he said.

The summit, he suggested, should tackle, not only the climate change and its effects, but also the other factors that aggravate the effects of climate change, including illegal logging, mining, improper waste disposal and pollution.

Food security and stable water supply, which are both being affected by the disastrous climate change, should also be discussed, Albano added.

In the meantime, Albano said the Climate Change Commission and the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) should launch massive nationwide information campaign to raise the level of public awareness on climate change and its effects.

“The people, who are the ones that usually suffer, should know.  They should be educated about climate change, what to expect and how to mitigate its effects at least on their level.  We cannot afford to be caught flatfooted; the risk is too much to ignore,” he stressed. (Kathrina Alvarez/Sunnex)



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Sunday, December 18, 2011

El Hierro Volcano : Yellow-Red alert

The eruption has subsided but is not over yet. 

(see images)

Last update: December 18, 2011 at 6:54 pm by By 



Update 18/12 – 18:48 UTC

Joke Volta told us this morning that she saw the Guardia Civil / Involcan helicopter. We expected new images and video of the remaining activity tonight. Here they are. All images are courtesy and copyright Guardia Civil Helicopteres / Involcan.
Update 18/12 – 18:04 UTC

Beautiful series of images made by Joke Volta during the morning hours ?
 Joke climbed almost to the top of the mountain carrying some antennas and the IGN cameras. The IGN cameras have been installed at a height of 198 meter to have the best possible view on the stain and the vent. The Cabildo and RTVC webcams are estimated to be installed at a height of 100 meter.
Click on the images to see the series in full size
Update 18/12 – 12:44 UTC

- It looks more and more today that the main vent is no longer active anymore. The new stains are feeding speculation that some new vents may have opened to the east of the former one and at approx. the same distance from La Restinga
Update 18/12 – 10:13 UTC

- Joke has been climbing a mountain behind La Restinga this morning to shoot some pictures.  She had to come done again because of the rough wind and has some bruises from gliding on the steepest parts. She reported that the head of the stain was very visible higher up (contrary to what we could expect after the subsiding tremor). Within a few hours you may expect her pictures.

- Joke told us a little earlier that she saw the Guardia Civil / Involcan helicopter flying over the Las Calmas sea.  This will bring probably tonight new videos and images. The reason why the helicopter wasn’t flying for many days last week was because a shortage of personnel (to be trusted source).
Morning stain as seen from above La Restinga
Update 18/12 – 10:10 UTC
- The RTVC webcam shows 2 well defined stains in another area than the normal vent. We expect that the stain may be a left over from earlier stains traveling around with the current.
Update 18/12 – 09:20 UTC
Bad news for the volcano fans-followers among our readers. The eruption is subsiding further and looses more and more strength.
- We do not know whether there is a direct connection with what happened yesterday afternoon as it can not be linked with the harmonic tremor graph, but we think that there is certainly an indirect relation. Yesterday afternoon 2 weak earthquakes occurred at very shallow depth in the coastal El Golfo area. The first one  occurred at 15:24 had a magnitude of 1.0 and occurred at a depth of 3.4 km. The second one occurred 1 minute later, had a magnitude of 1.4 and occurred at a depth of 3.0 km.
- Reader Heather also posted in her comment this morning that :  after the 15:24 quake, people ran to their homes as there was a very strong smell of gas and they had difficulty breathing (ER: unconfirmed so far).Update 12:26 UTC : Joke just called the El Golfo human webcam. She lives in Los Llanillos  and said that the quakes were not felt (ER: normal at this weak magnitude) and that she did not smell any special odor.
2 shallow earthquakes on December 17 2011 may have been the end of the eruption at El Hierro



Source, older reports, pictures: The Earthquake Report







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Wednesday, November 23, 2011

RED ALERT:El Hierro Volcano(Canary Islands)NEW VENT




Update 23/11 – 11:07 – Birth of a new vent !
A lot of activity this morning in the Las Calmas sea just south of La Restinga. New vents are opening and we could record the image of the webcam and then speed it up. It allows us to see the start of a new vent!






Update 23/11 – 07:50 – La Restinga Webcam saga (continued) – is everybody sleeping ?

We are sorry to use such sarcastic words in this update title, but we are highly irritated by the amateurism of professional telecommunications operators and local authorities. Local authorities are simply NOT aware of the island promotion capabilities  of these webcams. A letter Earthquake-Report.com wrote to the president of the Cabildo, Mr. Alpidio Armas is still unanswered. The Cabildo, Telefonica and the El Pinar authority did us (and scientists from all over the world) a favor in installing them, but fail to operate them properly reducing the value to 25% of the capabilities.
Thousands of people are following El Hierro on a daily basis via Earthquake-Report.com. The difference in between the pictures from Ian Carson and the Guardia Civil Helicopter overflights at one hand and what the webcams are showing on the other hand is striking. We know of course that it is impossible to obtain the same results with a webcam,  but it can be at least 4 times better than what we see now. Here are a few of our irritations and frustrations.
- The El Pinar Authority / ACN Press webcam shows the sea but nothing else.Nothing is done (not even on a daily basis) to direct the webcamera to the stain or activity areas. Sending somebody to the camera (at least on a daily basis) and positioning it with a cellphone in communication with somebody looking on a screen is enough to make the output a lot better.
- The Telefonica / Cabildo webcams are a story of initial good intentions stuck in … who knows ???
- The promised El Golfo webcams have NOT been installed yet.
- The La Restinga view webcam is unsharp since yesterday afternoon, which means that NOBODY looked at it since then !
- The eruption webcam, the most important one to give us a clue on what is going on, is operated on a  "when we have time" basis.  This morning the view was again completely out of the activity angle. It takes mostly several hours before somebody looks at a screen to see that the webcam has to be redirected. As Ian Carson made a picture from the mast and the webcam, we know that this webcam is operated from a distance, so it can be redirected to to exact angle almost continuously.
The webcams are definitely NOT HD and the material used is inferior to what the quality of such a high yield webcam should be.

We think that Telefonica / Movistar is to blame for the unsatisfied operations. Telefonica is a WORLD TELECOMMUNICATIONS GIANT and should behave like this, not like an amateur. In case of the poor island of El Hierro, we could eventually pardon the local authorities, but this does not goes up for Telefonica / Movistar.

Update 23/11 – 11:07
- Based on the webcam views, it is clear that many vents are emitting magmatic material at the moment. The bird's Eye View from the Guardia Civil helicopter will surely proof that later on.
- Also based on the webcam, it looks that the vents are closer to La Restinga but this is hard to say as we do not know the zoom aspect of the webcam.
Update 23/11 – 10:57
Joke is currently moving to a wifi cafe in La Restinga to send us the first stain pictures of the day. The coloring as seen on the webcam this morning will be probably very beautiful from Montaña Naos (Naos Mountain viewpoint). Ian does not want to miss one second from the beautiful activity and continues to make images from the Naos mountain viewpoint.
Joke has to move her belongings to another house but she is so excited about what is happening that she decided to cover today's events first.
Update 23/11 – 10:11
- Joke has just reported that what they see from the mountain is quiet spectacular. She met Ian Carson a little while ago and both are shooting pictures of the activity, which we will publish when they have the opportunity to upload them.
Joke Volta, Volunteer Correspondent/Artist and 25 year resident of El Hierro, is Interviewed by Radio Station
Data update 23/11 – 08:46
- Joke Volta told me a little while ago that the stain is clearly visible from El Pinar this morning
- IGN has listed 7 M+1.5 earthquakes since midnight UTC
- The depth varied from 15 to 20 km. We notice more earthquakes at a depth of 15 to 17 km. Nothing to implicate direct danger.
Yesterday, the day ended with 35 earthquakes, 2 being stronger than M 3
Harmonic tremor at medium strength with more occasional strong bursts
Air Quality at La Restinga : no unusual values
weather outlook : 15 – 17 knots winds and wave height 2.5 meter max. Partly cloudy.

23/11 – 13:48
- 2 readers Hans-Werner and Kasper + we guess a lot of others have seen the Guardia Civil helicopter above the stain.  This will deliver us hopefully beautiful pictures later today.
- at 11:22 , a 2.6 magnitude earthquake occurred at a depth of 13.3 km approx. 2 km to the south of Puerto Naos
- Joke reports that the local press is "absent" today. NO video on the Canary Island television.
Update 23/11 – 13:35
- Reader Martin Rey made an attempt to map the vents in relation top the La Restinga harbour.

Martin Rey made an attempt to map the vents in relation top the La Restinga harbour


Data update 22/11 – 23:50
- Stronger Harmonic tremor in between 19:00 and 20:00 
28 earthquakes M 1.5 or since midnight
- 2 Earthquakes measuring 3.3 - The 16:43 earthquake was felt by the islanders
Depth hypocenters : 12 to 23 km
Update 22/11 – 23:00
Ian Carson mentioned also that he was 1.5 miles from coast and the 'vent & stain' was one mile off shore also, there was a howling gale to vibrate the camera.. He said he was getting a bit worried at one stage as more spots were appearing. You never know….
The beauty of this island continues to unfold. If there is a God, he should spare this beautiful island and wonderful people from the power that nature can unfold
Update 22/11 – 19:49
Ian Carson was lucky today. He was most of the day in the North of the island and at his return to El Pinar he was able to take images from today's new activity. The activity is far more than we could see on the webcam. Ian's pictures are showing multiple emitting vents (as far as we could see on the picture mainly degassing (blue color)), although it would not surprise us that also magmatic material will have been ejected. As you will on the image series, a helicopter arrived also above the stain but unfortunately when most of the activity had subsided. 
Update 22/11 – 17:49
We have made a 6 seconds video from a few minutes eruptive action of the vent. Click here to watch the YouTube video.
Update 22/11 – 17:13
- IGN reports a magnitude 3.3 earthquake at a depth of 22 km in the El Golfo bay.
Update 22/11 – 16:10
New Jacuzzi and ejecting magmatic material (sometimes) visible on the Telefonica Eruption webcam at 16:10 UTC. We advise you to watch the webcam at least for 10 to 15 minutes. Please keep in mind that the distance from the present activity vent to the port of La Restinga is a approx. 3 km. Update 16:55 UTC : The good views only lasted for about 10 minutes.  To much backlight on the webcam at the moment. We expect better views within an hour
Update 22/11 – 15:26 – Proof of New degassing Vent yesterday (see also Ian Carson earlier comments)
Those people who have read the words of Ian Carson yesterday must have been surprised to read later on the IGN dismissed these findings and said "NO new vent" was found.
The Helicopter Unit of the Guardia Civil and Involcan detected a sudden release of gas south of the Restinga. The sudden release of volcanic gases were recorded at 11:40 hours on Monday November 21. Scientists of Involcan have informed PEVOLCA of the detection of a new sudden release of volcanic gases at 11:40 on Monday November 21. This visible emission of volcanic gases was located about 200 meters to the east of the main emission zone active from mid-October 2011. After the detection of the new vent by the Helicopter of the Guardia Civil, Involcan scientists returned to the new degassing vents to do some additional research (ie thermal imaging, etc) and had to find out that the intensity of the fumes disappeared, as it did during some previous occasions (November 4, 2011). These observations confirm the existence of sudden pulses of gas by submarine eruptive activity south of the Restinga. The geographic coordinates of this new sudden release of gases has been North 27º607547 / -17º991288  West.


Read More:
Source    El Hierro Volcano, Alerts  Corrected Source:
 http://Earthquake-Report.com    Earthquake-Report.com

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