Vibration Meter, seismograph Status

In VibrationMeterseismograph we use Instrumental Intensity Scale (developed by The United States Geological Survey) which maps peak ground acceleration and peak ground velocity on an intensity scale similar to the felt Mercalli Scale.  Peak Ground Acceleration (PGA) is equal to the maximum ground acceleration that occurred during earthquake shaking at location.  Vibration meter is an app called seismograph or seismometer, which measures the strength of vibration, quakes, earthquakes, vibrations of the human body or any other objects around you.  Our app allows for detecting and recording of seismic waves generated by earthquakes, volcanic eruptions, avalanches and other sources of vibration and shocks.  Ground movement or an object is presented as a function of time in the three Cartesian axes, with the z axis perpendicular to the Earth's surface and the x- and y- axes parallel to the surface.  Mercalli intensity scale is a seismic scale used for measuring the intensity of an earthquake.  PGA is equal to the amplitude of the largest absolute acceleration recorded on an accelerogram at a site during a particular earthquake.  Richter Scale assigns a magnitude number to quantify the energy released by an earthquake.  These values are used to create shake maps by seismologists on around the world. I. Instrumental - Not felt.  Graph presents a record of the ground motion at a measuring point.  VibrationMeterseismograph allows you monitor and share the results of your measurements with other users.  Destructive - Significant damage. Trees broken. IX. Violent - General panic. Serious damage. Cracks. X.  It measures the effects of an earthquake and it is distinct from the moment of magnitude.  Rather Strong - Felt by all. Small objects upset. VI.  Strong - Books off shelves. Trees shake. Damage. VII.  Slight - Felt indoors, like a passing light truck. IV.