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Waves from north Atlantic ‘weather bomb’ measured on other side of the world

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A VIBRATION that shook the earth from the Atlantic seafloor has been measured in Japan in a scientific breakthrough.The movement was started by a “weather bomb”, which was a low-pressure storm off Greenland two years ago.

The slowest of these vibrations has been traced by researchers who think that it opens up a new way to study the Earth’s hidden depths. 
The researchers, which have been documented in the journal Science, have used various seisometers in Japan to show that a group of tremors detected originated from a “weather bomb” storm on the other side of the planet. Kiwamu Nishida from the University of Tokyo and Ryota Takagi of Tohoku University used a network of 202 stations in the Chugoku region of southern Japan.

The signals could be traced all the way back to the north Atlantic. Dr Bromirski from the University of California San Diego, said: ”Most of what we know about the internal structure of the Earth has been determined from studying the way earthquake waves propagate, through the lower crust and the mantle and the core.
"In order to do that, you need to have a source that can generate a signal that propagates to your seismic stations. For some reason there are very few earthquakes in the mid Pacific so we don't have any sources there.

"These storm-generated P and S wave microseisms will hopefully allow us to better characterise the structure of the Earth below the Pacific."The findings could help experts to learn more about the Earth’s structure and improve the detection of earthquakes and ocean storms. 
These S waves have never been traced to their source before. 

A weather bomb is an intense low pressure system where dry air from the stratosphere flows into an area of low pressure. 
This causes air within the depression to rise very quickly creating a storm.
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