"And thou, all-shaking thunder,
Smite flat the thick rotundity o' the world!
Crack nature's moulds, an germens spill at once,
That make ingrateful man!"

-King Lear,
Act 2, Scene 3, King Lear
William Shakespeare

Friday, March 6, 2015

It's Nobody's Fault

Because of it's location on the Eurasian plate, Great Britain does not experience volcanic activity. However, Britain is home to many beautiful but dormant volcanoes, most of which are located in Scotland. Most of these volcanoes are ancient. In fact, the "super volcanoes" of Moore, Skye and Run  in western Scotland are estimated to be about 60 million years old.

Arthur's Seat, located at the highest
 point in Edinburgh is one of the most visited
volcanoes in Great Britain.
[http://www.dailymail.co.uk/travel
/travel_news/article-2853274/Scotland-
boasts-HALF-UK-s-best-volcanoes-none-
budge-stunning-Giant-s-Causeway-spot.html]
Why exactly does Great Britain have zero volcanic activity? It happens to do with it's exact location on the Eurasian tectonic plate. When tectonic plates come together, if one plate is denser than the other it will move under the lighter one. In this process of subduction, the high temperature melts rocks and creates magma. According to the British Geological Survey, when the magma comes up through the earth, it creates a volcano. However, since Great Britain is nowhere near the edges of a tectonic plate, new volcanoes don't occur.

Since volcanoes happen quite frequently in Iceland, the UK air traffic control service NATS occasionally issues "ash warnings" to help protect the European aviation industry. from massive ash clouds.


Sunday, March 1, 2015

All Shook Up

Wouldn't it be great if all it took to measure earthquakes was a sheet of paper and a couple of googley eyes? In reality, measuring seismic activity (especially in the UK) is complicated, yet absolutely fascinating!









Source
According to the British Geological survey, an earthquake occurs when a fault ruptures, releasing a burst of energy. The bursts of energy create ripples called seismic waves.  When these waves travel on the surface, they are naturally called "surface waves." On the other hand, waves called "body waves" travel in the body of the earth, and are split into two groups: S waves, which travel through solids only, and P waves, which travel through solids, liquids and gasses. (Keller and DeVecchio, 59-60)

Like any country, Britain;s earthquakes are caused by the movement of tectonic plates. Because it does not lie above a major boundary line, Britain experiences mainly minor earthquakes that are relatively frequent. In Great Briatian, out of the average 50 to 60 quakes taking place, only 20 to 30 earthquakes are felt each year, and most of which are never seen as posing any kind of threat. On to the Richter scale, the tool we use to measure the magnitude of an earthquake, earthquakes ranging below the level 4 mark are considered insignificant. Each year, most of Great Britain's earthquakes are felt at 5.

British Geological Survey provides
seismic activity stats regularly!
The British Geological Survey is a great resource which actually puts out a regularly updated list containing seismic events in the British Isles from the past 50 days. (Website can be found here!)

According to the survey, the most recent quake in Great Britain happened in Bromyard, Herefordshire. At a magnitude of 2.3, it's no wonder no one has yet reported feeling this small quake to the BGS.













Note to classmates reading this: anyone have any idea how to get rid of accidentally hi lighted portions of text?