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Tohoku-Oki Earthquake and Tsunami in Earth's Upper Atmosphere!!!

 
Luisport

User ID: 17231788
Portugal
06/02/2012 06:37 PM

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Tohoku-Oki Earthquake and Tsunami in Earth's Upper Atmosphere!!!
Tohoku-Oki Earthquake and Tsunami in Earth's Upper Atmosphere [link to photojournal.jpl.nasa.gov]
Anonymous Coward
User ID: 17242290
Malaysia
06/02/2012 06:39 PM
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Re: Tohoku-Oki Earthquake and Tsunami in Earth's Upper Atmosphere!!!
what is this dude?
Luisport (OP)

User ID: 17231788
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06/02/2012 06:39 PM

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Re: Tohoku-Oki Earthquake and Tsunami in Earth's Upper Atmosphere!!!
[link to earth-of-fire.over-blog.com]
Luisport (OP)

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06/02/2012 06:40 PM

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Re: Tohoku-Oki Earthquake and Tsunami in Earth's Upper Atmosphere!!!
what is this dude?
 Quoting: Anonymous Coward 17242290


It's about the consequences of big quakes in the atmosphere...
Anonymous Coward
User ID: 16692430
06/02/2012 06:41 PM
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Re: Tohoku-Oki Earthquake and Tsunami in Earth's Upper Atmosphere!!!
This explains it:

[link to photojournal.jpl.nasa.gov]
Luisport (OP)

User ID: 17231788
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06/02/2012 06:42 PM

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Re: Tohoku-Oki Earthquake and Tsunami in Earth's Upper Atmosphere!!!
what is this dude?
 Quoting: Anonymous Coward 17242290


It's about the consequences of big quakes in the atmosphere...
 Quoting: Luisport


This animation shows how waves of energy from the Tohoku-Oki earthquake and tsunami of March 11, 2011, pierced through into Earth's upper atmosphere in the vicinity of Japan, disturbing the density of electrons in the ionosphere. These disturbances were monitored by tracking GPS signals between satellites and ground receivers.

The disturbance measurements, known as vertical total electron content (VTEC), have been filtered to show wave-like disturbances in ionospheric electron density with frequencies between 0.5 and 5 milihertz (periods between 33 minutes and 3.3 minutes), similar to the frequency of a tsunami. The locations of the colored points in the animation correspond to the region of the ionosphere being monitored by the GPS receivers. Each receiver (there are more than 1,200 in Japan) can simultaneously receive signals from approximately 12 different GPS satellites, and hence we can monitor a wide range of locations in the ionosphere. (The motion of these Japan-shaped "clumps" is due to the motion of the GPS satellites in the sky, and is not related to the earthquake and tsunami. Rather, it is the changing color of the dots corresponding to the disturbed ionosphere.) This analysis has been done previously for the Samoa 2009 and Chile 2010 tsunamis [Galvan et al., 2011], but the Tohoku 2011 event represents the first time a major earthquake and tsunami have occurred in a region where the ionosphere over the epicenter was being observed by such a dense network of GPS receivers.

A model of ocean tsunami wavefronts [Song, 2007] is overlaid in blue to show the correlation between variations in the ionosphere above and ocean surface below. Note that traveling ionospheric disturbances (TIDs), visible throughout the animation, are correlated with the position of the tsunami. The earlier TIDs are likely associated with acoustic (longitudinal) and Rayleigh (transverse) waves caused by the earthquake itself, while later, slower-moving TIDs may be associated with atmospheric internal gravity waves caused by both the earthquake and the tsunami. The colorbar at right shows the magnitude of VTEC perturbation in the ionosphere in TECU (1 TECU = 10^12 electrons per square centimeter), while the left colorbar shows the size of the sea surface waves, in meters.
[link to photojournal.jpl.nasa.gov]
Luisport (OP)

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06/02/2012 06:48 PM

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Re: Tohoku-Oki Earthquake and Tsunami in Earth's Upper Atmosphere!!!
This animation is impressive isn't it?

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