We discuss the use of a genetic algorithm (GA) to invert data for many acceptable solutions, in contrast to inversion for a single, "optimum" solution. The GA is a directed search method which does not need linearization of the forward problem or a starting model, and it can be applied with a very large mode!-space. Consequently, fewer assumptions are required and a greater ange of solutions is...

Iran is located in an area with high earthquake risk. There are over 20 active faults with length of 500 km and also densely populated parts of the country have been rendered vulnerable to strong earthquakes. However, existence of eight faults of the main faults of Iran along with at least 18 faults with length of more than 100 km in Kerman province have turned the place into one of the riskies...

In this work, we present a new gravimetric Moho model over the Gulf of Guinea computed from inversion global gravity EIGEN-6C4 model. The computation procedure contains regularized non-linear algorithm. Before applying algorithm, data have been corrected effects topography, bathymetry, and sediments. To calculate these corrections, forward modeling has applied using tesseroids to take into acco...

The paroxysmal 2015 eruption of Volcán Villarrica (Chile) produced a 2.5 h long lahar, which descended more than 20 km within the Rio Correntoso/Turbio drainage and destroyed two small bridges. A three-element infrasound array 10 km from the summit, and 4 km from the lahar’s closest approach, was used to study the flow’s progression. Array processing using cross-correlation lag times and sembla...

We predict gravity from a three-dimensional Vp model of the upper crust and compare it to the observed isostatic residual gravity field. In general this comparison shows that the isostatic residual gravity field reflects the density variations in the upper to middle crust. Both data sets show similar density variations for the upper crust in areas such as the Peninsular Ranges and the Los Angel...

Results from a high-resolution numerical simulation of the 24 May 2002 dryline convective initiation (CI) case are presented. The simulation uses a 400 km 700 km domain with a 1-km horizontal resolution grid nested inside a 3-km domain and starts from an assimilated initial condition at 1800 UTC. Routine as well as special upper-air and surface observations collected during the International H2...

Utilizing the Turbo C programming language, atmospheric earth model is created from sea level to 86 km. This has been used determine Earth parameters in this study. Analytical derivations of these are made using balancing forces theory and hydrostatic equation. The effects altitude on density, pressure, temperature, gravitational acceleration, sound speed, scale height, molecular weight examine...