Vibration Meter

vibration meter, also known as seismograph,

This app uses the phone sensors to measure vibration or the earthquake, and it shows a reference as a seism detector.

Some countries use Richter scale instead of Mercalli scale. The Richter scale is a base-10 logarithmic scale, which defines magnitude as the logarithm of the ratio of the amplitude of the seismic waves to an arbitrary, minor amplitude.

mercalli intensity scale

présente les caractéristiques suivantes:

1. instrumental - Not felt. Recorded by seismographs.

2. Weak - Rarely felt, usually only on top floors of high buildings.

3. slight - felt indoors, like a passing light truck.

4. moderate - Windows, dishes, doors rattle. Like passing train.

5. Rather Strong - felt by all. Small objects upset.

6. Strong - Books off shelves. Trees shake. Isolated damage.

7. Very Strong - Difficult to stand. Many poor buildings damaged.

8. Destructive - Significant damage. Branches broken from trees.

9. Violent - General panic. Serious damage. Ground cracking.

10. Intense - Most buildings destroyed. Rails bent slightly.

11. Extreme - Rails bent greatly. Pipelines destroyed.

12. catastrophic - Near total damage. Objects thrown into the air.