Today I started the geophone at the farm Skeiðflöt. It is just south of Katla volcano. Some setup spikes are on the webicorder plot at the moment. But they should be clear off in the next 24 hours.
Currently there is bad weather in the area and it seems to show on the geophone at Skeiðflöt. But this new geophone adds to the sensitivity of my network and allows me to see earthquakes down to ML0.0 in good weather taking place in Katla volcano. But all large earthquakes should appear on this geophone regardless of most weather conditions outside. This geophone also increases my chances of seeing earthquakes in Eyjafjallajökull volcano if any take place to start with (it has been quiet after the eruption in the year 2010).
All my currently online geophones can be viewed online here. The webicorders are updated every 5 min.
This morning there was an earthquake swarm in Katla volcano. This is the first earthquake swarm of the year 2012. This earthquake swarm is most likely created by an dike intrusion. Based on how dense the earthquake swarm appears to be. But that is often an sign of an dike intrusion in an volcano. How this earthquake swarm is going to evolve over the next few hours impossible to know for sure. That depends on what the magma is going to do that is creating this earthquake swarm.
The earthquake swarm in Katla volcano. It is dense as can be on this picture from Iceland Meteorological Office. Copyright of this picture belongs to Iceland Meteorological Office.
The earthquakes can be seen on my geophone web page here (English). The geophone at Skeiðflöt is going to go up this week. So all activity in Katla volcano is going to appear more clearly following that. Sadly. No high resolution of the earthquakes that take place is not going to be available until I move back to Denmark. As my main earthquake computer is offline and is going to be so until that time.
I am going to post updates to this if anything more happens. But it might take a while as I am travelling today to Reykjavík area and tomorrow I am going to Skeiðflöt tomorrow.
During the past several hours the amount of water in the glacier flood from Grímsfjall volcano has not dropped a lot, but this glacier flood started two days ago (27.01.2012 around 12:00 UTC). But that might be down to heavy rain in the area. Normally a glacier flood from Grímsvatn lake (inside the Grímsfjall volcano caldera) last for about one to two days during a normal glacier flood. It is believed that this glacier flood is from Grímsfjall volcano glacier lake. But it might be hard to confirm this during this time of the year.
Possible noise from the glacier flood on this SIL station. This might however be increased noise due to heavy rain on it. Copyright of this picture belongs to IMO.
I have known for some time now that Grímsfjall volcano is preparing for a new eruption. This I know because of the increase in earthquake activity and increased hydro thermal activity in Grímsfjall volcano. So far there is nothing that suggest that Grímsfjall volcano is going to erupt this time around, at least for the moment. I am expecting this glacier flood to be over in the next several hours. No earthquakes have happened in Grímsfjall volcano during this glacier flood. I do not expect them to take place unless magma starts moving inside Grímsfjall volcano. Be that dike intrusion or start of an eruption.
Icelandic news about the glacier flood.
Óbreytt ástand í Gígjukvísl (mbl.is)
Sama vatnshæð í Gígjukvísl (Rúv.is)
Vatnshæð hélst óbreytt í nótt (Vísir.is)
It has just been announced in the news that Grímsvant glacier lake has just had an glacier flood, but this lake is in the Grímsfjall volcano caldera. This glacier flood is believed to have started yesterday around 12:00 UTC. The glacier river that the water is running into is called Gígukvísl. So far this appears to be minor flood so far. But I do not know how much water as in Grímsvatn lake when this flood did take place.
At current time it is impossible to know if an eruption is going to take place following this glacier flood from Grímsvatn lake in Grímsfjall volcano.
I am going to post more information about this as I get them.
Icelandic news about this. Use Google Translate if you want to get incomprehensible news about this event.
Líklegt að Grímsvötn hafi hlaupið (Vísir.is)
Hlaup í Gígjukvísl (Rúv.is)
Jökulhlaup í Gígjukvísl (mbl.is)
According to web cam images and images on the internet of Etna volcano. It seems that Etna volcano is preparing for an new small eruption. When and how big this eruption is going to be is impossible to know for sure. But ash emission have already started in the crater that is most likley going to erupt.
I am going to update this blog post with more details if I can get them.
Today at 14:53 UTC there was an Mw5.0 earthquake in north Italy according to EMSC. This earthquake had the depth of 60 km according to EMSC. This earthquake was felt in the area. But I have not seen any reports of damage from this earthquake. According to GVP this area of Italy is not volcanic in nature. Next active volcano is considerable distance to the south of this earthquake. This earthquake follows an swarm of earthquakes in this area. It is hard know for sure if this an pattern of something larger, or if this is just an minor earthquakes swarm that is over or is just about to be over.
Location of the earthquake according to EMSC. Copyright of this picture belongs to EMSC.
Local view of the earthquake according to EMSC. This earthquake was below an mountain range that is forming in this area. Copyright of this picture belongs to EMSC.
So far the largest aftershock in this area following this earthquake was an ML3.2 in size. That earthquake took place at 15:32 UTC. This earthquake was also felt in the nearby towns. It is my view that more earthquakes should be expected in the next few hours to days. But it is impossible to know how large and how many earthquakes there are going to be in this area.
At 01:33 UTC there was an Mw5.3 earthquake in Crete, Greece according to EMSC. The depth of this earthquake was 13 km according to EMSC. Size, depth and location might change when this earthquake is reviewed. This earthquake appears to be an aftershock of an Mw5.3 earthquake that took place last night yesterday. Following this earthquake there have been more aftershocks in the same area. The largest earthquake being ML3.6 in size according to EMSC. An unrelated earthquake with the size of ML3.9 took place in Greece few moments after the Mw5.3 earthquake.
The regional location of the earthquake according to EMSC. Copyright of this picture belongs to EMSC.
Local view of the earthquake according to EMSC. Copyright of this picture belongs to EMSC.
More earthquake activity should be expected in this area in my view. But how and where is close to impossible to know for sure. More aftershock activity should also be expected in next few hours to days.
Early this morning at 04:24 UTC there was an earthquake with the size of Mw5.3 this morning in Greece, Dodecanese Islands according to EMSC. The depth is estimated around 10 km. According to EMSC this earthquake was felt on nearby Islands. But it was followed with more the dozen or so aftershocks. The largest ones had the size of ML4.1, the largest aftershocks have also been felt on nearby Islands. But the epicenter of this earthquakes is out in the ocean. A good distance from next populated area. Aftershock activity is currently ongoing in this area.
The location of the Mw5.1 earthquake in Greece, Dodecanese Islands this morning. Copyright of this picture belongs to EMSC.
Local view of the earthquake this morning in Greece, Dodecanese Islands. Copyright of this picture belongs to EMSC.
Earthquakes of this size are common in this area of Greece. But in this area of Greece has an active subduction zone. As can be clearly seen on this picture here.
Picture of the subduction zones in Greece. Copyright holder unknown. But the picture is from the blog, In the Company of Plants and Rocks
For this reason, this area is highly active in both earthquakes and volcanoes.
Special on glasses and GSM repeater
Because I have to buy new glasses. I have to delay buying GSM repeater for my mom and dad. As my income does not allow for me buying both. But the cost of each is around 2000 DKK (offers and discounts depending on the glasses). A money that I cannot afford to spend all at once now. So I am just going to collect for the GSM repeater later in the year after I have moved to Denmark. As glasses have nr 1 priority for me. Since I am close to being blind without glasses. That is one reason why I hate having this small income as I do today. It is my hope that I can change it in next few months (12 to 24 months). At least I am going to try to do so.
Those how have already supported me for the GSM repeater. Thanks for the support. I however have to use it buy new glasses when I go to Denmark next month to apply for an apartment.
Blog post updated at 21:23 on 26.01.2012
After the eruption ended in El Hierro volcano it seems that minor magma dike intrusions have been taking place. This magma intrusions so far appears to be deep and not big. Given the depth and the size of the earthquakes that are currently taking place. This also suggests that new magma continues to flow into El Hierro volcano. But that flow might be at slower rate then it was early in the year 2011 before the eruption started. The largest earthquake in this swarm had the size ML2.8 with the depth of 12 km. Based on automatic data.
The current earthquake activity in El Hierro volcano. The earthquake swarm in question was small in size. Copyright of this picture belongs to IGN.
The earthquake activity appears clearly on this picture. The highest peak is the ML2.8 earthquake. Copyright of this picture belongs to IGN.
It is hard to know for sure what this means for future eruption events. Before the earthquake swarm today there was an small eruption somewhere in El Hierro volcano. It can be seen by the harmonic tremor levels. But this event was small, a lot smaller then earlier events. All that can be done is to wait and see what happens next in El Hierro volcano.
Today (25.01.2012) at 08:06 UTC (09:06 local time) an earthquake with the size of Mw4.9 did happen in north Italy according to EMSC. This earthquake was not far from the ML4.3 earthquake that did happen in nearby area yesterday (24.01.2012). According to reports this earthquake was clearly felt and some light damage has happened following this earthquake. I am not sure on aftershock activity in this area. But so far the largest aftershock has been with the size ML3.5, it was also felt in nearby towns.
The regional location of the Mw4.9 earthquake according to EMSC. Copyright of this picture belongs to EMSC.
Local view of the area where the Mw4.9 earthquake took place. Copyright of this picture belongs to EMSC.
More aftershocks are possible in this area. The trigger for this earthquake is most likely the earthquake that did happen yesterday and had the size of ML4.3. How that works is unclear. But the area in question was already at breaking point, so it needed little to break and make the earthquake happen. EMSC has put up an special web site with more information about this earthquake. That web site can be viewed here.
If any more large earthquakes happen. I am going to write about it soon as I can.