Breaking News 7.9/8.3-Magnitude Quake Shakes Ocean 120 Miles Southwest of American Samoa, page 1
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reply posted on 29-9-2009 @ 01:22 PM by Phage
Magnitude 6.6 according to USGS
No tsunami warning

www.prh.noaa.gov...



[edit on 9/29/2009 by Phage]

Just updated.
Tsunami watch in effect
7.9

www.prh.noaa.gov...


[edit on 9/29/2009 by Phage]


reply posted on 29-9-2009 @ 01:24 PM by lucentenigma
reply to post by InterconnecteD


Yup my browser was shaking, got the firefox plug in 'equake' installed.

Usually don't see them higher than 4. Was pretty surprised when I saw 7.9!


reply posted on 29-9-2009 @ 01:25 PM by lucentenigma
Originally posted by Phage
Magnitude 6.6 according to USGS
No tsunami warning

www.prh.noaa.gov...

[edit on 9/29/2009 by Phage]


Tsunami warning issued for New Zealand, other islands



WASHINGTON (Reuters) - A tsunami warning was issued on Tuesday for New Zealand, American Samoa and other small Pacific islands, according to the Pacific Tsunami Warning Center, a branch of the U.S. National Oceanic and Atmospheric Administration.

Source

also

Hawaii under tsunami watch after 7.9 quake off Samoa



The Pacific Tsunami Warning Center has issued a tsunami watch for areas of the south Pacific and Hawaii following a magnitude-7.9 earthquake near Samoa. It is not yet known if a tsunami was generated.


Honolulu Advertiser



[edit on 29-9-2009 by lucentenigma]


reply posted on 29-9-2009 @ 01:26 PM by spinkyboo
Originally posted by Phage
Magnitude 6.6 according to USGS
No tsunami warning

www.prh.noaa.gov...

[edit on 9/29/2009 by Phage]


Still reading 7.9 on the USGS that I posted above. But they usually do come down, sometimes substantially, after the initial report. So probably just slow in re-posting.


reply posted on 29-9-2009 @ 01:32 PM by spinkyboo
Originally posted by Phage
reply to post by spinkyboo

Actually it's been updated. The 6.6 was earlier.


Ah - wow. Is that Unusual?
I mostly see them downgraded.



reply posted on 29-9-2009 @ 01:33 PM by Phage
reply to post by spinkyboo

No. It was an earlier quake. The site updated as I was posting.


reply posted on 29-9-2009 @ 01:39 PM by lucentenigma
Originally posted by Phage
reply to post by lucentenigma

Yup. It updated right after I posted.


Do you know how long a tsunami would take to reach Hawaii from Samoa?

I guesstimate the distance at about 2000 miles.


reply posted on 29-9-2009 @ 01:41 PM by spinkyboo
Originally posted by Phage
reply to post by spinkyboo

No. It was an earlier quake. The site updated as I was posting.


Ah - I see. Thanks.

Interesting info here for those of you who are curious about the largest quake ever recorded. I just got curious as I had no idea where or how large it was.

www.extremescience.com...
earthquake.usgs.gov...

[edit on 29-9-2009 by spinkyboo]


reply posted on 29-9-2009 @ 01:43 PM by lernmore
reply to post by Phage


I also saw the earlier quake you were referring to... I thought the difference was a bit suspect. 7.9 is so much larger than a 6.6 that it was obvious it wasn't the same one.

Here's a representation of the energy released as you go up the scale.


Richter TNT for Seismic Example
Magnitude Energy Yield (approximate)

-1.5 6 ounces Breaking a rock on a lab table
1.0 30 pounds Large Blast at a Construction Site
1.5 320 pounds
2.0 1 ton Large Quarry or Mine Blast
2.5 4.6 tons
3.0 29 tons
3.5 73 tons
4.0 1,000 tons Small Nuclear Weapon
4.5 5,100 tons Average Tornado (total energy)
5.0 32,000 tons
5.5 80,000 tons Little Skull Mtn., NV Quake, 1992
6.0 1 million tons Double Spring Flat, NV Quake, 1994
6.5 5 million tons Northridge, CA Quake, 1994
7.0 32 million tons Hyogo-Ken Nanbu, Japan Quake, 1995; Largest thermonuclear Weapon
7.5 160 million tons Landers, CA Quake, 1992
8.0 1 billion tons San Francisco, CA Quake, 1906
8.5 5 billion tons Anchorage, AK Quake, 1964
9.0 32 billion tons Chilean Quake, 1960
10.0 1 trillion tons (San-Andreas type fault circling Earth)
12.0 160 trillion tons (Fault Earth in half through center,
OR Earth's daily receipt of solar energy)
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