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'[OT] quake activity'
2008\04\26@120228 by David VanHorn

picon face
A lot of quakes in the Reno Nv area lately, 230+ in the last week. (!)
Also, quite a few in southern illinois.

Interesting.

2008\04\26@123905 by Funny NYPD

picon face
Any particular reason?

Funny N.
Au Group Electronics, New Bedford, MA, http://www.AuElectronics.com



----- Original Message ----
From: David VanHorn <spam_OUTmicrobrixTakeThisOuTspamgmail.com>
To: Microcontroller discussion list - Public. <.....piclistKILLspamspam@spam@mit.edu>
Sent: Saturday, April 26, 2008 12:02:24 PM
Subject: [OT] quake activity

A lot of quakes in the Reno Nv area lately, 230+ in the last week. (!)
Also, quite a few in southern illinois.

Interesting.

2008\04\26@134512 by Alan B. Pearce

face picon face
>Any particular reason?

"There's a whole lot of shaking going on, Uh huh ..."

2008\04\26@172945 by Apptech

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flavicon
face
> A lot of quakes in the Reno Nv area lately, 230+ in the
> last week. (!)
> Also, quite a few in southern illinois.

> Interesting.

> Any particular reason?

Crude summary of popularish theory:     Often it's when two
Tectonic plates sliding past each other load up an energy
storage system (bits of bending rock) to the stage where the
resistance to slippage is overcome by the forces involved.
The stalled slippage then occurs in 1 or more "jumps" as
parts that reduce the slippage are overcome by the forces
involved. If you live nearby you hope that the value of "1
or more" is large. ie many small quakes and not 1 very large
one. You often get a "swarm" of small quakes preceding a
larger one as the system starts to fail and then "lets go".
Wikipedia knows I'm sure.



       Russell






2008\04\27@101723 by David VanHorn
picon face
> Crude summary of popularish theory:

http://ap.google.com/article/ALeqM5gS-Ci5Mg_3qzF4HK8o9c8qjvj2tgD909RRDO0

Seems I'm not the only one..

2008\04\27@165437 by Apptech

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flavicon
face
> http://ap.google.com/article/ALeqM5gS-Ci5Mg_3qzF4HK8o9c8qjvj2tgD909RRDO0
>
> Seems I'm not the only one..

Not too near a major plate boundary (as you know)

       http://vulcan.wr.usgs.gov/Glossary/PlateTectonics/Maps/map_plate_tectonics_world.html

They say they'd be surprised if the biggest quake was over
about 6.1

Note the two red "dots" on a curve on the Antarctic plate to
the right of South America. That's NZ :-). Where I am we are
off the plate edge proper - my city is instead over a
volcanic hot-spot (such as created and is creating the
Hawaiian chain.) Our next volcano is overdue.



   Russell

2008\04\28@035021 by Alan B. Pearce

face picon face
>Note the two red "dots" on a curve on the Antarctic plate
>to the right of South America. That's NZ :-).

Sheesh, you can't get Kiwis to describe their country position right ... I
think you meant to the right of Australia - NZ can be quite clearly seen on
the map. The ones to the right of South America are definitely not NZ ...
!!!

2008\04\28@062005 by Apptech

face
flavicon
face
> >Note the two red "dots" on a curve on the Antarctic plate
>>to the right of South America. That's NZ :-).

> Sheesh, you can't get Kiwis to describe their country
> position right ... I
> think you meant to the right of Australia - NZ can be
> quite clearly seen on
> the map. The ones to the right of South America are
> definitely not NZ ...
> !!!

"Well held, Sir"

He's right :-(.

   http://vulcan.wr.usgs.gov/Glossary/PlateTectonics/Maps/map_plate_tectonics_world.html

The volcanoes shown in NZ are arguably not correctly placed,
although the scale does not lend itself to good positioning.

Bottom dot is probably Ruapehu.

   http://www.wikimapia.org/#lat=-39.318097&lon=175.538521&z=12&l=0&m=a&v=2

Just above (< 15 km?) away is Tongariro aka Mt Doom for
those who have seen LOTR.

   http://www.wikimapia.org/#lat=-39.163342&lon=175.68718&z=12&l=0&m=a&v=2

Above and right is White Island - out to sea.

       http://www.wikimapia.org/#lat=-37.527154&lon=177.203979&z=8&l=0&m=a&v=2

WI steams regularly and erupts harmlessly usually.
Tongariro erupts ?5- 20 yearsly? and has hot spots and
thermal vents lower down. (Nice for glove warming during
"The Tongariro Crossing" at about 0C.
Ruapehu is a variable feast. Little eruptions 2-10 yearsish
and a good lava flow every ?50+?  years. It's has all our
major North Island ski fields on it so skiing sometimes gets
interrupted.

Nearby and unseen coz it's so very very very large is Mt
Taupo. Nobody but me calls it that. Largest eruption on
earth in last 20,000 years. Larger the time before. 30km x
20 km crater !!! :-)

   http://www.wikimapia.org/#lat=-38.673717&lon=176.105347&z=10&l=0&m=a&v=2



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