El Hierro and BoB are a theme that runs right through Volcanocafe and there is still unrest there more than 2 years after the onset of the seismic crisis. It’s been a bit busy this week and the comments from the crowd (thanks loyal commentators) provide a useful lesson in reading/ navigating the seismometers…
With a big thanks to IGN for putting their data out there.
Well, this is interesting. 4 El Hierro quakes in 15 minutes.
Looks like our old friend Bob is picking up again, and a strange signal from La Palma at 4.40am which also shows on other islands, but nothing listed apart from a mag 6 mid altantic ridge at 4am which would be far too early.
Yup, some action from Bob, nearly all located under the El Golfo/ Tanganasoga area. Low magnitude. I think there will be more during the day.
It probably is the North Mid Atlantic Ridge EQ. Note that CHIE is set to block out most external events so you would not see the complete wave form. You can see the full wave form here:
Apparently some people are stealing equipment (solar panels and batteries) from the IGN deployement in El Hierro. This causes some loss of data (and money also).
A ha, somebody be building a SIL of his/her own powers, to have unrestricted data for him to see how far the authorities have “sunk” in scaling it down 🙂
Seems the “Pirates of The Carabeean” have struck them Spaniards a blow
I’m afraid it is more prosaic than that, the thieves are stealing the solar panels and batteries to get some free electricity I suppose; they do not seem interested in the scientific equipment per se. By doing this they make IGN lose data from their equipment arrays. Maybe this can explain some of the outages on the seismometers.
Largest earthquake on El Hierro for a while @ about 13.25. No details up yet
Do you mean this one?
13:25:28 27.7223 -18.0185 11 Sentido 2.5 4 NW EL PINAR.IHI
Seismos from CMCL and CCUM which are nearby:
A nice plot from Dfm:
This is the El Hierro earthquakes update for September.
The black circles are events for June and July and August 2013. Size for these quakes is divided by 2.
On the first part there is an event by event animation, showing the date (look up the left scale of the colorbar).
The terrain color refers to elevation (see right scale on the colorbar).
In the title you can see the current rank of the event vs Total, the day and time of the day, and finally the magnitude.
I have kept the view angle constant to avoid unnecessary confusion due to plot rotation.
Circle size is proportional to event magnitude (4 times for the current event relative to older events).
The view is from the south. The major quakes so far for September are shown including today’s 2.5@13h25.
The second and third parts are day by day earthquakes animation. Date is shown on the title bar, views are from the East then from the South.
The third part is a rotation of all the earthquakes.
The fourth and fifth parts are a rotation to a top view showing all quakes and back.
The blue mesh is the bathymetry around the island.
The last part is a zoom centred on the last event. I have changed the limits to get a wider view compared to the other sequences.
There are still 2 clusters, one located under El Pozo/ Sabinosa and the other more to the east of that under El Golfo. For the second cluster the activity is now more prevalent and is deeper, but the activity is returning also to the west cluster. The cluster under El Golfo keeps being the most active since the last update (Aug 31st) but activity is more balanced.
The “dead zone” is still there with maybe a few quakes getting nearer.
Data from IGN and NOAA, made with Gnu Octave (Linux version) and avconv.
And a still frame:
Aaaannd one more for luck:
A 2.8 on El Hierro, at 22km this time. Maybe starting to wake again?
1231126 07/09/2013 12:18:03 27.7745 -18.2027 22 2.8 mbLg W FRONTERA.IHI – El Hierro
Last one was in July, 22 is pretty deep, sure looks interesting. It is west NW of Orchilla that a zone which was quite quiet for the last weeks.
All screenshots courtesy of:
For a bit more on monitoring the Canary Islands:
Great selection of links for El Hierro (thanks Spica,) and in the comments; instructions (courtesy of Sissel) for accessing the other seismometers: