Angel -- I got the following from Edward Cranswick on July 30, 1997. Karl > Ground Motion: Down to Up, i.e., upward, is positive. > Ground Motion: South to North, i.e., towards the North, is postive. > Ground Motion: West to East, i.e., towards the East, is postive. > > The above is a convention we use here at our USGS group in Golden, CO, > that chases earthquakes. The important thing is that the motion of the > ground in one linear direction is ultimately represented by some kind of > wiggly line on paper or a screen (computer, CRT, etc.), and as long as > one knows that when the line moves up or down, the ground moves back and > forth correspondingly, then one is getting started in using one's > instrument to find out what the Earth is doing. > -Edward --On Sunday, July 15, 2001 12:24 -0500 "angel@chiriqui"
wrote: > Hi All, > > If I tap a N/S horizotal geophone from the north which way should the > trace go? > > angel > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>