Post by Chicago Astronomer - Astro Joe on Dec 29, 2004 23:45:08 GMT -6
I have heard that the Earth wobble and shakes a bit right before/during/after an Earthquake. And, in addition, the axis alters...just a bit.
Earthquake: Terrestrial axis shift is measured
Matera, Italy - 28th December (23:38)
- Giuseppe Bianco, Director of the Centro di Geodesia Spaziale in Matera (Italy), has announced this afternoon that following the earthquake which hit the Asian coasts on 26th dec, the terrestrial axis shifted two thousandths of an arcsecond.
What was the method used to collect data?
“The Centro di Geodesia Spaziale di Matera is part of a network called International Laser Ranging Service (ILRS), linked to the International Association of Geodesy. ILRS has about forty survey stations. Data were collected by ILRS network and processed by Matera Centre. They are extremely up to date and waiting for a confirmation. The shifting is visible only in Y direction, that is longitude 90° and 270°. But it is not visible on Greenwhich.”
The influence this shifting will have on weather is irrelevant. Dr.
The ILRS stations
Bianco reminds that natural variations due to the nutation, that is oscillations of the terrestrial axis over a short period of time, are indeed more intense.
Yet to confirm a possible variation in length of the terrestrial day. According to Richard Gross from Jet Propulsion Laboratory a day might now last three millionths second more than before, a value which seems quite important.
Also, yet to be confirmed is the exact dynamics of the telluric movements, which are still affecting the Indian Ocean: since 26 December, there have been 43 earthquakes above magnitude 5 (Richter scale).
The last warning bulletin, issued by the Pacific Tsunami Warning Center announces that part of the energy released last Sunday by the quake, has spreaded all over the Pacific Ocean basin. That caused a wavering phenomenon which is still affecting the level of sea: in Chile (50 cm in Callao), New Zealand (65 cm in Jackson Bay), California (22 cm in San Diego), with a maximum of 2.6 metres in Manzanillo, Messico, probably due to local resonances. This phenomenon will probably last a few more days, until the energy released by the earthquake is completely dispersed.
The full story here: www.uai.it/index.php?tipo=A&id=662
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Listening to the C2C radio show, I found it interesting that the axis of the Earth isn't as stable as we are taught. And yes...I am aware of the pole progression, this is a different matter .
The ancients wrote about when the skies abruptly changed...perhaps the pole shift is coming sooner than we think!
Earthquake: Terrestrial axis shift is measured
Matera, Italy - 28th December (23:38)
- Giuseppe Bianco, Director of the Centro di Geodesia Spaziale in Matera (Italy), has announced this afternoon that following the earthquake which hit the Asian coasts on 26th dec, the terrestrial axis shifted two thousandths of an arcsecond.
What was the method used to collect data?
“The Centro di Geodesia Spaziale di Matera is part of a network called International Laser Ranging Service (ILRS), linked to the International Association of Geodesy. ILRS has about forty survey stations. Data were collected by ILRS network and processed by Matera Centre. They are extremely up to date and waiting for a confirmation. The shifting is visible only in Y direction, that is longitude 90° and 270°. But it is not visible on Greenwhich.”
The influence this shifting will have on weather is irrelevant. Dr.
The ILRS stations
Bianco reminds that natural variations due to the nutation, that is oscillations of the terrestrial axis over a short period of time, are indeed more intense.
Yet to confirm a possible variation in length of the terrestrial day. According to Richard Gross from Jet Propulsion Laboratory a day might now last three millionths second more than before, a value which seems quite important.
Also, yet to be confirmed is the exact dynamics of the telluric movements, which are still affecting the Indian Ocean: since 26 December, there have been 43 earthquakes above magnitude 5 (Richter scale).
The last warning bulletin, issued by the Pacific Tsunami Warning Center announces that part of the energy released last Sunday by the quake, has spreaded all over the Pacific Ocean basin. That caused a wavering phenomenon which is still affecting the level of sea: in Chile (50 cm in Callao), New Zealand (65 cm in Jackson Bay), California (22 cm in San Diego), with a maximum of 2.6 metres in Manzanillo, Messico, probably due to local resonances. This phenomenon will probably last a few more days, until the energy released by the earthquake is completely dispersed.
The full story here: www.uai.it/index.php?tipo=A&id=662
--------------
Listening to the C2C radio show, I found it interesting that the axis of the Earth isn't as stable as we are taught. And yes...I am aware of the pole progression, this is a different matter .
The ancients wrote about when the skies abruptly changed...perhaps the pole shift is coming sooner than we think!
