Posted on 05/19/2011 5:42:43 PM PDT by blam
Atmosphere Above Japan Heated Rapidly Days Before Earthquake
Politics / Environmental Issues
May 18, 2011 - 01:15 PM
By: Chris Kitze
Infrared emissions above the epicentre increased dramatically in the days before the devastating earthquake in Japan, say scientists
Geologists have long puzzled over anecdotal reports of strange atmospheric phenomena in the days before big earthquakes. But good data to back up these stories has been hard to come by.
In recent years, however, various teams have set up atmospheric monitoring stations in earthquake zones and a number of satellites are capable of sending back data about the state of the upper atmosphere and the ionosphere during an earthquake.
Last year, we looked at some fascinating data from the DEMETER spacecraft showing a significant increase in ultra-low frequency radio signals before the magnitude 7 Haiti earthquake in January 2010
Today, Dimitar Ouzounov at the NASA Goddard Space Flight Centre in Maryland and a few buddies present the data from the Great Tohoku earthquake which devastated Japan on 11 March. Their results, although preliminary, are eye-opening.
They say that before the M9 earthquake, the total electron content of the ionosphere increased dramatically over the epicentre, reaching a maximum three days before the quake struck.
At the same time, satellite observations showed a big increase in infrared emissions from above the epicentre, which peaked in the hours before the quake. In other words, the atmosphere was heating up.
These kinds of observations are consistent with an idea called the Lithosphere-Atmosphere-Ionosphere Coupling mechanism. The thinking is that in the days before an earthquake, the great stresses in a fault as it is about to give cause the releases large amounts of radon.
The radioactivity from this gas ionises the air on a large scale and this has a number of knock on effects. Since water molecules are attracted to ions in the air, ionisation triggers the large scale condensation of water.
But the process of condensation also releases heat and it is this that causes infrared emissions. "Our first results show that on March 8th a rapid increase of emitted infrared radiation was observed from the satellite data," say Ouzounov and co.
These emissions go on to effect the ionosphere and its total electron content.
It certainly makes sense that the lithosphere, atmosphere and ionosphere are coupled in a way that can be measured when one of them is perturbed. The question is to what extent the new evidence backs up this idea.
The Japan earthquake is the largest to have struck the island in modern times and will certainly turn out to be among the best studied. If good evidence of this relationship doesn't emerge from this data, other opportunities will be few and far between.
Ref: arxiv.org/abs/1105.2841: Atmosphere-Ionosphere Response to the M9 Tohoku Earthquake Revealed by Joined Satellite and Ground Observations. Preliminary Results.
Ping to geologist.
Haven’t checked this out—another FREEPER wondered about a connection:
MUCH APPRECIATED.
You might ask him . . . if he could see a connection that some have already logically made up-thread. All I can say on that score.
Some real food for thought on your post:
‘story of predicting earthquake and telling disaster chief in San Fran, where it was predicted. Does chief now tell mayor to evacuate the city, or ignore it, or just happen to take the day off and drive his family for an out of town excursion? ...’
Thanks for sharing the info from your son.
The Wichita event was explained meteorologically. The Nippon event has no basis for a MET explanation as far as I can tell.
Someone else wondered about false alarms or what happens when the atmosphere suddenly heats up, well it just doesn’t do that without a rational explanation, such as major warm front passing over, katabatic winds down a mountain or sloping hills, othre phenomenon that are well known.
This has some promise if the MET dept cannot explain the heat bubble from a known atmospheric event.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.