THE ENERGY RATE-DEPTH FUNCTION FOR EARTHQUAKES

Regression Analysis: Predicting Depth of Earthquakes

The importance of predicting Earthquakes is increasing due to recent catastrophes such as those in Haiti and Japan. In this project we tried to predict the depth of hypocenters of earthquakes based on ISE-GEM cagalog. Using Regression Tree we divided the Earth’s surface into thirteen smaller regions, and classified them into five groups. On each group we applied General Additive Model(GAM) and ...

Repeating deep earthquakes: evidence for fault reactivation at great depth.

We have identified three groups of deep earthquakes showing nearly identical waveforms in the Tonga slab. Relocation with a cross-correlation method shows that each cluster is composed of 10 to 30 earthquakes along a plane 10 to 30 kilometers in length. Some of the earthquakes are colocated, demonstrating repeated rupture of the same fault, and one pair of events shows identical rupture complex...

Energy Development Linked with Earthquakes

The energy release in great earthquakes

The conventional magnitude scale M suffers saturation when the rupture dimension of the earthquake exceeds the wavelength of the seismic waves used for the magnitude determination (usually 5-50 km). This saturation leads to an inaccurate estimate of energy released in great earthquakes. To circumvent his problem the strain energy drop W (difference in strain energy before and after an earthquak...

Representations of the radiated energy in earthquakes

S U M M A R Y We investigate the representation of the radiated energy, E R, in earthquakes. In seismology E R is estimated from either far-field seismic waves or the stress and displacement on the fault plane. Although E R comes from the entire volume of the Earth, it can be expressed as an integral over the fault plane. However, the integrand cannot be given a simple physical meaning such as ...