Since the last post has grown somewhat ‘large’, I thought I could better create a new post with some updated information, and less than about 600 (!) comments to scroll by. Because the last post (and the comments section) was really full with excellent links, I will start off by providing the link to the previous post:
Several commenters have mentioned that the period between the flare-ups of earthquake activity has been steadily increasing, and that the intensity of the earthquakes has been increasing as well. Below is the tremor graph of today, which shows a phase of intense quaking/shaking just after midnight and another phase this afternoon, which produced the largest EQ of this renewed activity yet at M4.1
harrie has mentioned that over the last few days a clear trend in EQ’s could be seen, translating to a general westward and upward movement of the ‘active front’ where the quakes were generated. However, this afternoon he mentioned that this upward trend of EQ’s has stopped since about 100 listed EQ’s ago, while the trend of more intense EQ’s with time has not. This might mean that the mechanism that has been seen by many as being the growth of a sill, has come to a stop, while the magma flow has not. This could mean a hard stop has been reached, while pressure is now slowly rising in the system, looking for a way out in another direction, which might be directly upward through one of the many pre-existing-but-inactive dikes/conduits below El Hierro.
KarenZ mentioned that AVCAN has posted a warning on their Facebook page, stating that El Hierro inhabitants should keep an eye on the TV and an ear to the radio to be sure not to miss anything if official sources issue a warning, or other critical information.
Vulcanoelhierro.es (in Spanish) has published an article stating that so far nothing abnormal has been sighted while performing acoustic depth measurements to detect anomalies at the seafloor which might indicate the activity has reached the ocean floor. Sissel, an earthquake-report reader is being mentioned by earthquake-report.com for providing an image of the cruising traject of the ship. There it is also mentioned that INVOLCAN has sent in a team to reinforce measuring systems, and to measure CO2 as well.
On the other hand, the deformation is still ongoing. In fact, the scale had to be adjusted to still be able to see the deformation at the Sabinosa station. Below is the deformation image, for all to draw their own conclusion…
Let’s also not forget dfm‘s rotating 3D plots which show the earthquakes in time-lapse mode, projected with the El Hierro geography, with an explanation in his comment. I will try to keep this one updated if he decides to post a new one with updated data as time progresses.
And last but not least….
I would also like to point to some of Kilgharrah‘s ‘Name those Volcano’ riddles. Only one has been solved so far, so lots of opportunities for a volcanophile to rise on the volcanophile-list-of-fame (currently dominated by Alison and several other women) remain for all!.
Name those Volcanoes Riddle
Note – this weeks riddle is a little different …. In order to identify each volcano you have to establish a link (some are more tenuous than others) between the volcano and various classifications, dates, places, events, people etc …. each clue has three genuine links and one ‘red herring’ included!
1 point for each correct volcano and 1 point for each ‘red herring’ (which must be identified with an explanation) guesses wont count ….. good luck!
No 1 – Lord Byron’s wife ; November 5th 2013 – Australian sporting event; Lethal mud slides; Pacific Ring of Fire; SOLVED
No 2 – Stratovolcano; Canada; Formula 1 Team; Angels – song; SOLVED
No 3 – Stromatolites; 40,000; Rain forest; UNESCO; SOLVED
No 4 – UK; Dormant; Summer Rain – song; Vintage Car Museum owner; SOLVED
Hints: ‘red herrings’ are now marked in bold! I have added to the clues as well to help get them solved!