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47042
From: Eve, [DNS_Address]
Subject: 18 yrs. ago radiation from a magnetar radiation reaches Earth...
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December 27, 2004 – Radiation from an explosion on the magnetar SGR 1806-20 reaches Earth. It is the brightest extrasolar event known to have been witnessed on the planet. EXCERPT: Fifty thousand years after a starquake occurred on the surface of SGR 1806-20, the radiation from the resultant explosion reached Earth on December 27, 2004 (GRB 041227).[3] In terms of gamma rays, the burst had an absolute magnitude around −29.[a] It was the brightest event known to have been sighted on this planet from an origin outside the Solar System, until the GRB 080319B. The magnetar released more energy in one-tenth of a second (1.0×1040 J) than the Sun releases in 150,000 years (4×1026 W × 4.8×1012 s = 1.85×1039 J).[4] Such a burst is thought to be the largest explosion observed in this galaxy by humans since the SN 1604 supernova observed by Johannes Kepler in 1604. The gamma rays struck Earth's ionosphere and created more ionization, which briefly expanded the ionosphere. A similar blast within 3 parsecs (10 light years) of Earth would severely affect the atmosphere,[5] by destroying the ozone layer and causing mass extinction,[6][7] and be similar in effect to a 12-kiloton nuclear blast at 7.5 kilometres (4.7 mi).[citation needed] The nearest known magnetar to Earth is 1E 1048.1-5937, located 9,000 light-years away in the constellation Carina. 
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47043
From: Meghan, [DNS_Address]
Subject: Re: 18 yrs. ago radiation from a magnetar radiation reaches Earth...
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Yep...the 'Boxing Day' earthquake and ensuing tsunami which killed 250,000 people in a dozen or so countries is intricately linked to that event...oh nothing much! Just a coincidence. Riiight... |
47046
From: Meghan, [DNS_Address]
Subject: Here's a link...
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Apparently the preceding wave could not be measured because the telescopic equipment was not operational at that time, having been taken down for modifications??? So no definitive proof of a GRB cause and Earthquake effect until the NEXT TIME it happens! |
Responses:
[47047]
47047
From: Eve, [DNS_Address]
Subject: Re: 18 yrs. ago radiation from a magnetar radiation reaches Earth...
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some other articles for reference: RADIO NONDETECTION OF THE SGR 1806−20 GIANT FLARE AND IMPLICATIONS FOR FAST RADIO BURSTS https://iopscience.iop.org/article/10.3847/0004-637X/827/1/59 Lots of SGR 1806-20 research article links here: https://worldwidescience.org/topicpages/m/magnetar+sgr+1806-20.html |
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