Seismograph Diagram Order. Horizontal pendulum seismograph as invented by english seismologist john milne in 1880. The spring mounted seismograph records the vertical ground motion.
Pictures and diagrams of my latest system designs click on thumbnails below for full screen images short period seismometer complete system with electronics and sensor infiltec qm 45 l15b exterior. In order for a seismograph to be effective it must be designed in such a way that it only reflects true earth tremors rather than surface disturbances. The seismogram shown on the right side shows the p wave s wave and surface wave due to an earthquake.
P waves act like sound waves.
The energy measured in a seismogram may result from an earthquake or from. When there is no earthquake reading there is just a straight line except for small wiggles caused by. In excel 2013 click insert insert stock surface or radar chart radar. The distance r between two events θ1 φ1 and θ2 φ2 is calculated by using a spherical triangle as given by hirata 1989.