PSN-L Email List Message
Subject: Re: seismograph item?
From: hammond hammond@...........
Date: Thu, 05 Dec 2002 18:39:51 -0900
Bob, it's a strong motion accelerograph which uses film as the recording
The unit gets triggered if the ground acceleration exceeds a set value and
the ground motion on a wide film strip. These are still widely used but
digital strong motion recorders.
Public Seismic Network - Alaska
At 05:09 PM 12/5/2002, you wrote:
> Ebay offers:
>Kinemetrics SMA-1 Seismograph Event Indicator
>Item # 1923224052 ends Dec 10
> I have no idea what this is but it looks complicated.
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