The deterministic nature of earthquake rupture

Article Abstract:

Data is collected to show that the frequency content of radiated seismic energy within the first few seconds of in an earthquake scales with the final magnitude of the event. It is inferred that the magnitude of an earthquake can be estimated before the rupture is complete and that the rupture process is deterministic to some extent and has implications for the physics of the rupture process.

Earthquake intensity

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Earthquake rupture dynamics frozen in exhumed ancient faults

Article Abstract:

Pseudo-tachylyte-filled secondary fractures around an exhumed fault can be used in the reconstruction of the earthquake rupture directivity, rupture velocity and fracture energy. The reconstructions can be compared with theoretical dynamic stress field computed around propagating fractures to see the asymmetry in distribution and orientation of fractures along a fault line.

Management dynamics, Analysis, Management, Earthquake engineering, Company business management, Structural dynamics

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Friction falls towards zero in quartz rock as slip velocity approaches seismic rates

Article Abstract:

The data on quartz rocks that indicate an extraordinary progressive decrease in frictional resistance with increasing slip velocity above 1 mms(super -1) is presented. As a result of the formation of a thin layer of silica gel on the fault surface, friction falls towards zero at seismic slip rates of ~1ms (super -1).

Skin friction (Fluid dynamics), Sand, Sands

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