How do you find peak ground acceleration?
The peak horizontal ground acceleration (PHA or PHGA) can be reached by selecting the higher individual recording, taking the mean of the two values, or calculating a vector sum of the two components. A three-component value can also be reached, by taking the vertical component into consideration also.
What is the peak ground acceleration for Zone V?
The Indian seismic code defined peak ground acceleration (PGA) for the Maximum Considered Earthquake (MCE) is 0.36 g and the Design Basis Earthquake (DBE) is 0.18 g for service life of structure, for the highest seismicity area, Zone V.
What is peak ground velocity?
In regards to an earthquake, “velocity is how fast a point on the ground is shaking as a result of an earthquake,” and the peak ground velocity is the greatest speed of shaking recorded at particular point during an earthquake. [ iii]
What is peak spectral acceleration?
PGA (peak acceleration) is what is experienced by a particle on the ground. SA (spectral acceleration) is approximately what is experienced by a building, as modeled by a particle on a massless vertical rod having the same natural period of vibration as the building.
What is the difference between peak ground acceleration and spectral acceleration?
What does PGA mean earthquake?
PGA (peak acceleration) is what is experienced by a particle on the ground, and SA is approximately what is experienced by a building, as modeled by a particle mass on a massless vertical rod having the same natural period of vibration as the building.
Which of the following can be triggered by an earthquake?
As well as being highly destructive in their own right, earthquakes can also trigger two other very destructive natural hazards. One of these is a landslide. This is a rapid movement of earth materials down a slope, the materials ranging from huge boulders to soil.
What is peak ground acceleration?
Peak ground acceleration (PGA) is equal to the maximum ground acceleration that occurred during earthquake shaking at a location. PGA is equal to the amplitude of the largest absolute acceleration recorded on an accelerogram at a site during a particular earthquake.
What is the probability of an earthquake?
Worldwide the probability that an earthquake will be followed within 3 days by a large earthquake nearby is somewhere just over 6% . In California, that probability is about 6% . This means that there is about a 94% chance that any earthquake will NOT be a foreshock.
What is earthquake hazard?
Earthquake Glossary. earthquake hazard Earthquake hazard is anything associated with an earthquake that may affect the normal activities of people. This includes surface faulting, ground shaking, landslide, liquefaction , tectonic deformation, tsunamis, and seiches. Seismic hazard map for the United States.