A strange deep earth tremor has been detected for the first time on the ocean floor in Japan, whose origin has been traced to a storm between Greenland and Iceland.
The findings could help experts learn more about the internal structure of the Earth and improve detection of earthquakes and stormsocean.
The storm that caused the deep quake was a “weather bomb” hit over the North Atlantic. It was a small but powerful storm that pressure quickly creates a stronger storm.
As the storm developed, resulting waves hit the ocean floor between Greenland and Iceland.These subtle waves spread through the Earth and could be detected in remote locations.
The researchers used seismic equipment in 200 locations both on land and on the seabed in Japan to track the tremors . His readings showed they were microseismicity of secondary waves (S) or very weak tremors.
Unlike primary (P) waves, which is usually detected during major hurricanes, G waves are slow, and only move through the rock. This is the first time scientists have observed a wave S.
In an article published in Science, Peter Gerstoft and Peter Bromirski, of the University of California, San Diego say that this discovery provides seismologists a new tool to study the deep structure of the Earth.
Although earthquakes in Japan were not an earthquake, the results could improve understanding of the inner core of the Earth, and could be used to improve detection ofearthquakes in the future.
