What do they use portable seismographs for at construction sites?
Jun 30, 2009
in
Earthquake Questions
I understand what the instrument does but I’d like to know it’s use at a construction site…..thanks 
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2 comments
td17_uk on June 30, 2009 at 9:13 am
they are used for testing ground stability a sound wave is passed into the ground and picked up by the seismograph the results are studied and can tell the construction company about the makeup of the ground
Scott M on June 30, 2009 at 9:13 am
To measure the movement of the ground to adjust their drawing for the predicted drift.
Also to measure for possable sewer, water and storm drain breaks.