Slightly different application, using GPS to predict rock slide:
http://www.amerisurv.com/PDF/TheAmericanSurveyor_Schrock-GuardiansOfTheRock_Vol9No3.pdf
---per
At 07:22 20.05.2012, Hal Murray wrote:
i...@blackmountainforge.com said:
> They also use GPS units for tectonic shift. Put a unit on e
On 5/19/2012 10:22 PM, Hal Murray wrote:
Another gadget that I saw was a "two color" laser ranging setup. It was good
for 1 mm over 5 km. (ballpark)
I think I saw that too. Pretty old; mid-80's probably. The number
switches caught my attention. Made me try to figure out the vintage. My
guess
i...@blackmountainforge.com said:
> They also use GPS units for tectonic shift. Put a unit on each plate and
> measure the difference between them. When it gets to be a large enough
> number, something, somewhere will slip and you will have a quake.
Yes, but that's the DC term.
The seismologi
bo.com
> [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray
> Sent: Saturday, May 19, 2012 18:09
> To: time-nuts@febo.com
> Subject: [time-nuts] USGS: GPS for seismic work
>
> It wasn't hard to find the right people at the Open House.
>
> GPS is interesting for big qua
On 05/20/2012 03:09 AM, Hal Murray wrote:
It wasn't hard to find the right people at the Open House.
GPS is interesting for big quakes.
Most seismometers measure acceleration. It's a double integration to get
displacement which is what they are used to working with. Big quakes last
longer whi
I was at the USGS open house for a couple hours. My first time to go.
Was also my first time to see a commercial choke ring GPS antenna up
close. Was interesting to see the antenna shifted a few inches and
causing a step function on the internet screen where they where
monitoring it along with
It wasn't hard to find the right people at the Open House.
GPS is interesting for big quakes.
Most seismometers measure acceleration. It's a double integration to get
displacement which is what they are used to working with. Big quakes last
longer which leads normal seismometers to get into t
