More data from tide charts and earthquakes

More data from tide charts and earthquakes

As I told you, earthquakes keep spreading in locations and magnitude, I made a comment explaining what happened. The following is an edited excerpt of that comment.

‘RSOE EDIS – Emergency and Disaster Information Service, is a webpage developed in Hungary from the images of NASA TerraMetrics Satellite and has its own time zone.
This page collects and shows various emergencies and disasters locations for worldwide events. They use two sources for earthquakes. One is the USGS the Geological Service of the United States which uses the (UTC) time zone convention, and their own sensors. The other is EMSC the European Monitoring Seismic Centre which uses (GMT) time zone convention, and their own sensors too. This gives a two-hours difference lapse of time.

Update:

‘IT IS NOT TWO EARTHQUAKES, it is the same earthquake, but sensed and timed differently according to where it has been perceived.’

They are actually two different events exactly separated by a two hours lapse in summer time, and by one hour lapse in winter time. I know because I have been checking the page every so often and realized there were certain events wich did not appear two times.

Published originally in October the first 2014

Anyway, I hadn’t noticed this before because there were no iterations for weak earthquakes, which means they didn’t appear twice in the chart because they were not sensed by both networks of sensors. Besides, the locations for earthquakes have different names, hence I had thought both networks offered data about different events.

So it’s kind of mixed emotions news:
On the one hand, the earthquakes are not repeating each two hours.
On the other,
they appear twice because they are strong enough to be detected by more sensors, which means they are still spreading (Ontake volcano, Japan) and increasing in magnitude.’

RSOE-EDIS page offers some filters and layers. If you click on the ‘Layers’ menu you have two checkboxes: ‘Weather’ which shows temperatures, and ‘Clouds’. Check them and bear in mind seawater freezes at minus twenty-eight degrees Centigrade | Celsius. 

In the ‘Area’ menu there are several options for different regions. One of them is ‘Europe’. Scroll down and you will see a chart with GMT times, magnitudes and locations for each earthquake. Filtering like this you will only see the data provided by EMSC, so if anything has a pattern it will be for different events.

I have been observing since August the 23rd events for Bardarbunga area in Iceland. There are three different places for the events: Kirkjubajarklaustur, Reykjahlid, and Hofn. 

If you go the the tide charts and pick Iceland you will see another menu onto which you can select from various locations for the tides: earthquakes are occurring related to tide times for different locations, but that’s because of the height of water, which is something you can see in the chart on the left in metres and on the right in feet.

I have been watching two: Reykjavik, and Hafnarfiordur, and have noticed the earthquakes are taking place when the sea level is near two metres high for those two locations.

Right now there is a relation between tide times and earthquakes in SEYÐISFJÖRÐUR.

I suspect earthquakes are being triggered by seawater getting in contact with volcanic vents in Bardarbunga volcano system, the biggest in Europe, and that is dangerous. Here you are the latest update on the situation (friday, 26 September) there.

‘No significant changes have occurred at the ongoing eruption in Holuhraun and the seismic crisis. The eruption itself continues with steady, very large lava output and is on its way to become the largest event in the past 150 years on Iceland. So far, it has erupted approx. 0.5 cubic kilometers of lava, covered 40 square kilometers at an average depth of 12 meters. During the past 150 years, only the Hekla volcano eruption in 1947 (which however lasted 13 months) has produced more lava. If the current activity goes on for another 2 weeks at the same rate, it will beat this record. Gas releases are record-breaking figures: approx 10-20,000 tons of gasses (mainly SO2) are released each day. A road (Gæsavatnaleið) used to access the eruption has been covered by lava flows, making it more difficult to geologist to get to the eruption. A magnitude 5.2 earthquake occurred this morning under the Bardarbunga caldera, which keeps sinking at 50 cm per day. Its total subsidence is almost 30 meters now. Earthquake activity has slowly increased again under the active dyke, which could indicate increasing pressure and involves an increased risk that new fissures open up, possibly under the glacier.’

Yeah, you are right, it is not nice at all, but it is happening and if nothing is done will get worse.

Be calm and spread this posts I have been writing under the tag GLOBAL ISSUES, and check what I am saying.

Acerca de María Cristina Alonso Cuervo

I am a teacher of English who started to write this blog in May 2014. In the column on the right I included some useful links and widgets Italian is another section of my blog which I called 'Cornice Italiana'. There are various tags and categories you can pick from. I also paint, compose, and play music, I always liked science, nature, arts, language... and other subjects which you can come across while reading my posts. Best regards.
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