El Hierro Volcano eruption (Canary Islands) : Part 45 – June 15 until June 24

Last update: June 28, 2012 at 12:19 am by By

This is Part 45 of the El Hierro Volcano eruption report

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With the collaboration of Joke Volta, an El Hierro resident and Julio del Castillo Vivero, photographer.
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Update 24/06 – 23:58 UTC
- IGN has just added another earthquake to their list. A M2.3 quake at a depth of 22 km below the El Golfo beach at 22:00.

Update 24/06 – 23:21 UTC
The least we can say, it that the harmonic tremor is one of the strongest since a while. The hourly graph below shows the HT variations in a better way than the daily graph.
No earthquakes so far in the vicinity of the eruption cone, only at El Golfo. The HT stronger amplitude line is however not constant.
We are very curious what the authorities will report tomorrow, … if the HT continues at the present levels.

Thank you to Julio and Joke
I just returned from a 3- week holiday period in the western USA, impressive nature including Yellowstone caldera, Idaho and California volcanoes.
I want to express my gratitude to Julio del Castillo Vivero who has regularly updated this article (Julio was in frequent contact with Joke Volta). (Armand)

Update 24/06 – 22:51 UTC
A fairly strong M3.1 earthquake occurred in the El Golfo bay tonight and was followed by a number of smaller earthquakes in the same area, this only in a couple of minutes. The depth for all the earthquakes was around 20 km, a depth which was also noticed in the pre-eruption phase.
The CHIE tremor graph below is showing a little wider amplitude since the quakes have started.

Update 24/06
- No earthquakes today or yesterday.


Update 22/06
- Since the 19th June there have been 10 earthquakes, all of them very weak. Here is a list of them

Event Date Time Lat Lon Depth
(km)
Int Mag Location
1149893 20/06/2012 00:08:28 27.6382 -18.0410 21 1.3 SW EL PINAR.IHI
1149913 20/06/2012 08:35:38 27.7557 -18.0333 18 0.8 W FRONTERA.IHI
1150031 20/06/2012 17:04:27 27.6395 -18.0615 25 0.5 SW EL PINAR.IHI
1150032 20/06/2012 17:11:09 27.7432 -18.0527 25 0.8 W FRONTERA.IHI
1150033 20/06/2012 17:24:08 27.7680 -18.0589 25 0.3 W FRONTERA.IHI
1150034 20/06/2012 17:35:39 27.8180 -18.0035 24 0.3 N FRONTERA.IHI
1150064 21/06/2012 01:08:08 27.7096 -18.0704 10 0.4 SW FRONTERA.IHI
1150192 21/06/2012 14:09:07 27.7802 -18.0604 34 1.0 NW FRONTERA.IHI
1150260 22/06/2012 06:46:06 27.9246 -18.0864 25 1.1 NW FRONTERA.IHI
1150416

22/06/2012 22:21:30 27.6544 -18.0234 12 0.5 SW EL PINAR.IHI

Update 19/06 – 15:00 UTC
- Joke Volta has sent us a few images, here is one of the Hesperides around Las Calmas sea.

Update 19/06 – 12:00 UTC
- Between yesterday and this morning a total of 40 earthquakes. Most of them are clearly part of a swarm and almost all in Frontera.
- Vessel Hesperides in currently around La Restinga. We can’t confirm if they are using the ROV or doing a bathymetry, lets hope they do.
- Using the website of AVCAN we have created this map showing these 40 earthquakes. Activity concentrates primarily on the North side of the Island.


Update 18/06 – 23:00 UTC
- 10 Earthquakes today! It might indicate the system is starting slowly up again as depths are getting smaller. Also, a swarm starting at 21:52 with 7 earthquakes in an hour is significant.
- Seismograph CHIE is showing more earthquakes that haven’t yet been included in the list by IGN.
- Here is the list, with the strongest one of M 2.3 at 22:14.

Event Date Time Lat Lon Depth
(km)
Mag Location
1149439 18/06/2012 16:23:43 27.8032 -18.0744 16 1.2 NW FRONTERA.IHI
1149438 18/06/2012 18:00:35 27.8018 -18.0595 17 1.8 NW FRONTERA.IHI
1149441 18/06/2012 20:03:31 27.8151 -18.0497 14 0.9 NW FRONTERA.IHI
1149486 18/06/2012 21:52:47 27.7689 -18.0419 17 1.8 NW FRONTERA.IHI
1149488 18/06/2012 22:14:12 27.7864 -18.0377 17 2.3 NW FRONTERA.IHI
1149490 18/06/2012 22:30:07 27.7596 -18.0370 16 1.1 W FRONTERA.IHI
1149491 18/06/2012 22:37:29 27.7711 -18.0440 16 1.2 NW FRONTERA.IHI
1149492 18/06/2012 22:44:30 27.7494 -18.0489 16 1.2 W FRONTERA.IHI
1149493 18/06/2012 22:45:02 27.7188 -18.0319 17 1.5 SW FRONTERA.IHI
1149494 18/06/2012 22:52:35 27.7926 -18.0430 19 1.2 NW FRONTERA.IHI

Update 17/06
- Joke Volta has done another great job at collecting information for the past week and creating a fantastic weekly report (10-16th June) for us. The PDF can be downloaded here.
- Images and documents related to the weekly update can be downloaded here
- From the last update a few earthquakes, not as strong as on the 14th June, and 7 in total. Here is a list of them:

Event Date Time Lat Lon Depth
(km)
Mag Location
1148969 15/06/2012 20:58:32 27.6876 -18.0853 27 1.2 W EL PINAR.IHI
1148970 15/06/2012 20:59:01 27.7606 -18.0467 16 0.7 W FRONTERA.IHI
1148971 15/06/2012 23:37:17 27.7713 -18.0504 18 0.9 NW FRONTERA.IHI
1149031 16/06/2012 15:35:21 27.7772 -18.0474 16 1.2 NW FRONTERA.IHI
1149122 17/06/2012 01:06:58 27.7896 -18.2184 34 1.7 W FRONTERA.IHI
1149147 17/06/2012 06:20:19 27.6341 -18.0054 18 1.0 SW EL PINAR.IHI
1149215 17/06/2012 16:46:48 27.7547 -18.0432 18 1.5 W FRONTERA.IHI

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