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Japan's 8.9 has just been ungraded to 9.0

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posted on Mar, 14 2011 @ 07:49 PM
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Sorry, don't know if this has been posted yet but according the the USGS website, the recent Japan earthquake has been upgraded to 9.0.
Just wondering how much more powerful the difference is? Does anyone with that kind of background have any idea how much more powerful this makes it?
I think I read somewhere that each step on the scale is 100 times stronger that the next?



SMR

posted on Mar, 14 2011 @ 07:55 PM
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Several threads have had this posted. I posted it in one as well.



posted on Mar, 14 2011 @ 07:56 PM
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I just posted it too...!!

A lot of quake watchers around!!



posted on Mar, 14 2011 @ 07:56 PM
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reply to post by SMR
 


Thanks, I looked and didn't see that this has been posted. Still wondering how much more powerful is and 8.0 vs 9.0



posted on Mar, 14 2011 @ 07:59 PM
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Originally posted by starwatcher1
reply to post by SMR
 


Thanks, I looked and didn't see that this has been posted. Still wondering how much more powerful is and 8.0 vs 9.0


I believe it's a logarithmic scale: 9.0 is 1000 times as strong as an 8.0.
Anyway, it was upgraded from 8.9 to 9.0.



posted on Mar, 14 2011 @ 08:02 PM
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reply to post by this_is_who_we_are
 

Thanks for the information. That would mean that upgrade of the earthquake would make it 100 times more powerful that the 8.9... Both bad news



posted on Mar, 14 2011 @ 08:09 PM
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Someone posted the actual numbers couple days ago, think Zorgon or Phage, but anyways, the difference was somewhere in the range of 130 maga tons of TNT. (approx: 8.9 = 350 mega tons, 9.0 = 480 mega tons)



posted on Mar, 14 2011 @ 10:21 PM
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reply to post by starwatcher1
 


the maths dont quite work out that way but it is probably closer to around 10 times the magnitude.



posted on Mar, 14 2011 @ 10:41 PM
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Wikipedia has a good list of the relative strength of earthquakes at different magnitudes:

Magnitude // Approximate TNT for Seismic Energy Yield // Joule equivalent // Example

0.5 // 84.4 g (2.98 oz) // 355 kJ // Large hand grenade
1.0 // 474 g (1.05 lb) // 2.00 MJ // Construction site blast
2.0 // 15.0 kg (33.1 lb) // 63.1 MJ // Late World War II conventional bombs
3.0 // 474 kg (1.05×103 lb) // 2.00 GJ // Massive Ordnance Air Blast bomb (MOAB)
4.0 // 15.0 metric tons // 63.1 GJ // Small atomic bomb
5.0 // 474 metric tons // 2.00 TJ // Nagasaki atomic bomb (Total yield including air yield 21 kT, 88 TJ)
6.0 // 15.0 kilotons // 63.1 TJ // Double Spring Flat earthquake (Nevada, USA), 1994
7.0 // 474 kilotons // 2.00 PJ // Haiti earthquake, 2010
8.0 // 15.0 megatons // 63.1 PJ // San Francisco earthquake (California, USA), 1906
9.0 // 474 megatons // 2.00 EJ // Japan earthquake 2011
12.5 // 100 teratons // 400 ZJ // Yucatán Peninsula impact (creating Chicxulub crater, killed off dinosaurs)
23.0 // 4.2×1029 tons // 1.3×1039 J // Approximate magnitude of the starquake on the magnetar SGR 1806-20
edit on 3/14/2011 by LifeInDeath because: (no reason given)



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