Implementing and exploring innovative approaches to seismicity analysis and earthquake statistics has been the focus of my research for the past five years. The comprehensive seismicity analysis software that I have developed, ZMAP, is distributed by IASPEI and now in use in more than 30 research institutes worldwide. This resulted in multiple opportunities for collaborative research projects. ...

The recently introduced Minimalist Model [VázquezPrada et al, 2002] of characteristic earthquakes provides a simple representation of the seismicity originated in a single fault. Here, we first characterize the properties of this model for large systems. Then, assuming, as it has been observed, that the size of the faults in a big enough region is fractally distributed, with a fractal dimension...

A sequence of earthquakes occurred in 2008 in the Meruoca granitic pluton, located in the northwestern part of the Borborema Province, NE Brazil. A seismological study defined the seismic activity occurring along the seismically-defined Riacho Fundo fault, a 081° striking, 8 km deep structure. The objective of this study was to analyze the correlation between this seismic activity and geologica...

Unsupervised learning techniques provide a way to investigating scientific data based on automated generation of statistical models that describe the data. Because they do not incorporate a priori information, they can be used as an unbiased method to separate data into distinct types. Thus they can be used as an objective method by which to separate data into previously known classes or to fin...

We compare traditional methods of seismic event location, based on phase pick data and analysis of events one-at-a-time, with a modern method based on cross-correlation measurements and joint analysis of numerous events. In application to four different regions representing different types of seismicity and monitored with networks of different station density, we present preliminary results ind...

iran is well known for having countless historical and instrumental records of tectonic events. shahriary catchment, as a study area, is part of the zagros collision seismic province. this research aimed to introduce a new method which is useful in identifying the relative active tectonic events of an area. the research method was designed in order to calculate the relative active tectonic inde...

Shillong plateau in the North East India resembles a kind of inselberg, confined between great Hilamalayan mountain belts north and Arakan-Yoma towards east. The study area is governed by system complex seismotectonic features responsible for intense seismicity region, significantly devastation aftermath 1897 Assam Earthquake (Ms~8.7). Spatio-temporal distribution triggering inside from 1966 to...

We calculate physical properties of rocks in subduction zones using a compilation of mineral physical property measurements, a new set of phase diagrams and subduction-zone thermal models, and apply our results to Cascadia. Observed P-wave speeds of the Juan de Fuca plate west of the Cascadia trench are best matched by a greenschist-facies upper crust and metastable, partially hydrated lower cr...

A residual sphere is formed by projecting seismic ray travel-time anomalies, relative to a reference Earth model, onto an imaginary sphere around an earthquake. Any dominant slab-like fast band can be determined with spherical harmonic expansion. The technique is useful in detecting trends associated with high-velocity slabs beneath deep earthquakes after deep-mantle and near-receiver effects a...

Beginning in April 2016, a series of shallow, moderate to large earthquakes with associated strong aftershocks struck the Kumamoto area of Kyushu, SW Japan. An Mj 7.3 mainshock occurred on 16 April 2016, close to the epicenter of an Mj 6.5 foreshock that occurred about 28 hours earlier. The intense seismicity released the accumulated elastic energy by right-lateral strike slip, mainly along two...