Posted on 02/21/2005 6:40:07 AM PST by frithguild
The brightest gamma ray burst ever recorded arrived on December 27, 2004 at Universal Time 21 hours, 30 minutes. The blast was 100 times more intense than any burst that had been previously recorded, equaling the brightness of the full Moon, but at gamma ray wavelengths. Gamma ray counts spiked to a maximum in 1.5 seconds and then declined over a 5 minute period with 7.57 second pulsations. It was determined to have originated from SGR 1806-20, a neutron star 20 kilometers in diameter which rotates once every 7.5 seconds, matching the GRB pulsation period. SGR 1806-20 is located about 10 degrees northeast of the Galactic center and about 45,000 light years from us, or about twice as far away as the Galactic center. It released more energy in a tenth of a second than the Sun emits in 100,000 years. Other gamma ray bursts have been detected whose explosions were intrinsically more powerful than this one, but since they originated in other galaxies quite distant from our own, they were not nearly as bright. What makes this gamma ray burst unique is that it is the first time that such a bright burst has been observed, one that also happens to originate from within our own Galaxy.
An explosion of our Galaxy's core, however, would produce a burst far more intense than this. SGR 1806-20 has been estimated to have a stellar progenitor mass of 150 solar masses, whereas our Galactic core has a mass of 2.6 million solar masses. In its present active phase SGR 1806-20 is estimated to have a luminosity 40 million times that of the Sun, whereas during its active phase the Galactic center could reach luminosities of 400 trillion times that of the Sun. So it is understandable that if the Galactic center were to erupt, it would produce a gamma ray burst far more intense than the outburst from this star.
In his 1983 Ph.D. dissertation, Paul LaViolette called attention to terrestrial dangers of high intensity gamma ray bursts originating from within our Galaxy, particularly from the GC, writing also about their associated EMP effects (e.g., see Page 3). Gamma ray bursts at that time had just begun to be discovered, and at that time no one was concerned with them as potential terrestrial hazards. In recent years scientific opinion has come around to adopt LaViolette's concern, as can be seen in news articles discussing the SGR 1806-20 gamma ray outburst, e.g., see Space.com news story. They note that if this gamma ray burst had been as close as 10 light years it would have completely destroyed to ozone layer. By comparison, the Galactic superwaves LaViolette has postulated to have impacted the Solar system during the last ice age would have showered the solar system with cosmic ray electrons having an energy intensity 100 times greater than this hypothetical 10 light year distant stellar gamma ray burst.
In his dissertation, LaViolette also noted that a strong gravity wave might travel forward at the forefront of a superwave and might be the first signal indication of a superwave's arrival. He pointed out that such gravity waves could induce substantial tidal forces on the Earth during their passage which could induce earthquakes and cause polar axis torquing effects. Experiments carried out by Eugene Podkletnov with shock front outbursts show that they produce a longitudinal gravitational wave that travels forward at superluminal speeds (in excess of 67 times the speed of light). Also Guy Obolensky has observed electrostatic potential shocks to propagate forward at speeds as high as 7 times the speed of light. Observations suggest that the gravity wave from an expanding stellar explosion will decrease its superluminal speed and eventually approach the speed of light. But meanwhile, the gravity wave will have gotten a headstart over the electromagnetic wave component (light, gamma rays, etc.). So one would expect that earthquake activity would precede the gamma ray burst component of a superwave. The same should be expected of smaller gamma ray outbursts if their gravity waves were sufficiently strong to trigger noticeable earthquake activity.
In view of the above, it is interesting that the December 27th gamma ray burst, the most intense in the 25 year history of gamma ray burst observation happened to follow the 9.2 Richter Indonesian earthquake and tsunami of December 26th by just 44.6 hours! Like the December 27th GRB, this earthquake was unique, being about ten times stronger than the next most intense earthquake to occur during the past 25 years. It, then, seems difficult to pass off the temporal proximity of these two class one events as just as a matter of coincidence.
Indonesian earthquake and tsunami: December 26, 2004 at 00 hours 58 minutes UT
SGR 1806-20 gamma ray burst: December 27, 2004 at 21 hours 36 minutes UT
A time span of 25 years compared to ~45 hours, a ratio of about 5000:1. In fact, many have inquired if there might be a connection between these two events (e.g., see the Space.com article). The reason why astronomers have been reluctant to admit there is a connection is that they know of no mechanism by which gamma rays by themselves could trigger earthquakes. They admit that gamma rays could slightly affect the ionization state of the Earth's atmosphere, but it is questionable that this would somehow cause earthquakes. However, if a longitudinal gravity potential wave pulse were to accompany a gamma ray burst, the mystery becomes resolved. The connection between earthquakes and gamma ray bursts becomes plausible.
In his book Earth Under Fire (as well as in his dissertation), LaViolette presents evidence showing that the superwave that passed through the solar system around 14,200 years ago had triggered supernova explosions as it swept through the Galaxy. Among these was the Vela and Crab supernova explosions whose explosion dates align with this superwave event horizon. One way this could be explained is if this superwave had a gravity wave component whose disturbance triggered unstable stars as it passed through them.
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Those interested in monitoring earthquake, gamma ray burst, and cosmic ray background activity are referred to the following websites:
Earthquakes (current): http://earthquake.usgs.gov/recenteqsww/Quakes/quakes_all.html
Earthquakes (past): http://earthquake.usgs.gov/activity/past.htmlpast.html
Gamma ray bursts: http://grad40.as.utexas.edu/grblog.php?author=D.%20Gotz
Cosmic ray radiation intensity: http://cr0.izmiran.rssi.ru/mosc/main.htm
Gravity wave bursts (LIGO site: no posted data, just posted papers): http://www.ligo.caltech.edu/ and http://www.ligo.org/results/
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The December 27th GRB was not accompanied by any rise in the cosmic ray background, indicating that if it was accompanied by cosmic rays their intensity was unable to exceed the relatively constant extragalactic background flux arriving from distant galaxies. A Galactic superwave, on the other hand, would most likely produce a substantial rise in these levels.
LIGO (Laser Interferometer Gravitational Wave Observatory) research team has investigated whether there might be a correlation between their gravity wave data and a particularly strong gamma ray burst 030329 that was recorded in 2003 and identified with a supernova occurring in a galaxy about 2600 light years away. They found no correlation with their data. However, they operated on the stated assumption that the gravity wave would have traveled at the speed of light and would have been nearly coincident with the gamma ray pulse. Experiments with gravitational shock fronts however suggests that their hypothesis is incorrect, that the gravity wave should actually precede the gamma ray pulse. The December 27th gamma ray pulse had a much higher intensity, so there is a possibility that the proposed December 26th gravity wave is registered in their data.
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Note that almost two months passed before the December 27th gamma ray burst found its way into news media stories. If very major activity were to occur in the near future as the beginning stages of a superwave arrival, hopefully scientists will not keep it to themselves and news media will pick up the story quickly to inform the world.
Gamma Rays from Earth ....can’t be....
What's that.?
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