December 2016 Current Affairs

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Japanese scientists detect rare deep-Earth tremor S wave microseism

Japanese scientists detect rare deep-Earth tremor S wave microseism
27 August 2016 Current Affairs: Scientists in Japan studying earthquakes for the first time have detected a rare deep-Earth tremor, known as an S (secondary) wave microseism. Microseisms are very faint tremors. The detection was made by scientists from the National Research Institute for Earth Science and Disaster Prevention in Japan.

The rare deep-Earth tremor S wave microseism was detected for the first time and traced its location to a distant and powerful storm. The storm in the North Atlantic known as a weather bomb which was a small but potent storm that gains punch as pressure quickly mounts. During the storm, groups of waves had sloshed and pounded the ocean floor which struck between Greenland and Iceland. 

Using seismic equipment on land and on the seafloor researchers found a tremor known as an S wave microseism. S wave Microseisms are very faint tremors compared to P (primary) wave microseisms and they occur in the 0.05 to 0.5 Hz frequency range. P wave microseisms can be detected easily during major hurricanes. 

They are fast-moving waves and can travel through gaseous, liquid and solid materials. But the elusive S waves are slower and move only through solid rock, not liquid. Humans feel them during earthquakes. Significance of Discovery: It will help experts learn more about the Earth’s inner structure and improve detection of earthquakes and oceanic storms. Learning more about S waves microseismic will further aid to understand the deeper crust and upper mantle structure.


December 2016 Current affairs

November 2016 Current affairs
30 NOV
NEWS
29 NOV
NEWS
28 NOV
NEWS
26 NOV
NEWS
25 NOV
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24 NOV
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October 2016 Current affairs
31 OCT
NEWS
27 OCT
NEWS
26 OCT
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25 OCT
NEWS
24 OCT
NEWS
22 OCT
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September 2016 Current affairs
30 SEP
NEWS
29 SEP
NEWS
28 SEP
NEWS
27 SEP
NEWS
26 SEP
NEWS
24 SEP
NEWS

August 2016 Current affairs
31 AUG
NEWS
30 AUG
NEWS
29 AUG
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27 AUG
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26 AUG
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25 AUG
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