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Learn about the different methods of seismic analysis, such as equivalent static, response spectrum, linear dynamic, nonlinear static and time history analysis. Find out how seismic analysis is used in structural design, earthquake engineering and assessment of buildings and nonbuilding structures.
The Marikina Valley Fault System is a strike-slip fault system in Luzon, Philippines that runs through Metro Manila and nearby provinces. It has two major segments, West Valley Fault and East Valley Fault, and poses a threat of a large scale earthquake with high magnitude and casualties.
Coseismic period is the stage of an earthquake cycle when the fault ruptures and releases stress. Learn how coseismic period is related to the interseismic, preseismic, and postseismic periods, and how it affects earthquake recurrence and rupture variety.
PHIVOLCS is a national institution that provides information and services on volcanic, seismic, and tsunami activities in the Philippines. It was formed in 1982 from the merger of the Commission on Volcanology and the seismological arm of PAGASA, and is under the Department of Science and Technology.
Learn about the seismic scale developed by the Philippine Institute of Volcanology and Seismology (PHIVOLCS) to measure the intensity of earthquakes. The scale has ten levels from I to X, ranging from scarcely perceptible to completely devastating, based on the effect of the earthquake on people, structures and objects.
Seismic hazard is the probability of earthquakes and ground motion in a given area and time. Learn how seismic hazard is estimated, measured and mapped, and how it differs from seismic risk and MCEs.
The Philippine Fault System is a network of geological faults caused by tectonic forces compressing the Philippines into the Philippine Mobile Belt. It includes the Philippine Fault Zone, the most seismically active region, and other active fault systems such as the Valley Fault System and the Lubang-Verde Passage Fault System.
Fracking is a technique of injecting fluid into rock formations to extract natural gas, petroleum, and brine. Learn about the geology, mechanics, and environmental impacts of fracking, as well as its history and regulation around the world.