PSN-L Email List Message

Subject: Re: Real time traces
From: "Kay Wyatt" kwyatt@.............
Date: Fri, 14 Aug 2009 10:03:31 -0700


I am curious about the installation enclosure for your seismometer.  It 
looks like a granite slab surrounded by a plastic enclosure.  Is this 
located in a basement or is it outside.  How do you insure it is waterproof? 
What is the granite slab setting on?  What type of plastic enclosure are you 

Thanks so much,
Kay Wyatt

----- Original Message ----- 
From: "Brett Nordgren" 
Sent: Friday, August 14, 2009 9:51 AM
Subject: Re: Real time traces

> Meredith,
> We certainly don't want to be accused of torture, though we'll gladly 
> plead guilty to some discreet teasing.
> For a little more tease, see 
> a photo and a couple of sketches.  The photo shows a slightly earlier 
> configuration, but is basically what Dave is running now.
> We want to go slowly in regards to encouraging folks to start trying to 
> make something like this until we feel we're able to do our part to help 
> with any problems.  Building one of these would definitely not be a good 
> first project, though I think we are coming to the point where we can 
> provide some more detail if there is any particular interest.
> Regards,
> Brett
> At 11:09 PM 8/13/2009 -0600, you wrote:
>> guys sure know how to torture people...with the 2 mysterious 
>>unseen undefined experimental instruments.
>>How about a web photo's "sneak peek" of the verticals?  :>)
>>Meredith Lamb
>>On Thu, Aug 13, 2009 at 1:47 PM, Brett Nordgren wrote:
>>>Hello All,
>>>We just put up a Web page which displays some near real time outputs from 
>>>two of our experimental vertical feedback seismographs.  There are 
>>>displays showing three different combinations of sensitivity and low-pass 
>>>filtering, which highlight different types of ground motion.
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