نتایج جستجو برای: value parameter in aftershocks sequences

تعداد نتایج: 17098712  

2008
Ka Wong Frederic Paik Schoenberg

Despite previous observations that aftershocks lie preferentially along the fault planes of mainshocks, many branching models for earthquake occurrences do not directly incorporate information on the moment tensors of mainshocks in forecasting the spatial distribution of aftershocks, or do so in a very simplistic way using spatial kernels which have not been rigorously tested on earthquake data...

Journal: :تحقیقات مهندسی کشاورزی 0
علی اصغر خوشنود یزدی مربی آموزشکده کشاورزی شیروان، دانشگاه فردوسی مشهد بیژن قهرمان استادیار گروه آبیاری دانشکده کشاورزی، دانشگاه فردوسی مشهد

the arya and paris model is a commonly accepted method to translate a particle-size distribution curve into a corresponding soil moisture characteristic curve using scaling parameter (α). the scaling parameter, in the original model of arya and paris (1981), was assumed constant (α=1.38) for all soil texture classes. in recent years, several studies have shown that α is not constant and its qua...

2001
Sebastian Hainzl Frank Scherbaum

The question whether the preparation process of foreshocks and mainshocks is diierent from other earthquakes is of great interest with regard to earthquake predictability. We show that the most conspicuous properties of earthquake clustering can be explained without assuming any diierences in the initiation processes. In particular, the Gutenberg-Richter law as well as the Omori law for foresho...

Journal: :Frontiers in Earth Science 2023

After the occurrence of 2008 Wenchuan M w 7.9 earthquake, Longmen-Shan fault zone exhibits highly active seismicity. In years between and 2022, successive moderate magnitude aftershocks followed in region. this study, we used high-quality seismic data from National Earthquake Data Center China to estimate source parameters 184 events ( 3.9–6.2) Fault zone. The dataset comprised two sequences th...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده علوم 1391

abstract in the present research solution of chalcopyrite in sulfuric acid in hydrometallurgy method using electrochemistry with cyclic voltammetry technique has been investigated. the value of maximum reduction peak current of copper ions represents the measure of solubility. in this research different parameters temperature, potential, potential exert time, chalcopyrite concentration, sulfur...

Journal: :Physica D: Nonlinear Phenomena 1998

Journal: :Molecular biology and evolution 2002
Stéphane Guindon Olivier Gascuel

This paper deals with phylogenetic inference when the variability of substitution rates across sites (VRAS) is modeled by a gamma distribution. We show that underestimating VRAS, which results in underestimates for the evolutionary distances between sequences, usually improves the topological accuracy of phylogenetic tree inference by distance-based methods, especially when the molecular clock ...

2007
Dapeng Zhao Hiroo Kanamori

A detailed 3-D P-wave velocity structure of the crust in the epicentral area of the 17 January, 1994 Northridge earthquake is determined by using 104,709 arrival times from 1673 Northridge aftershocks and 2948 other local earthquakes. A test performed using the data from the nearby portable stations suggests that the aftershock hypocenters relocated with the obtained 3-D model are accurate to a...

2009
Hongfeng Yang Lupei Zhu Risheng Chu

We developed a sliding-window cross-correlation (SCC) detection technique and applied the technique to continuous waveforms recorded by the Cooperative New Madrid Seismic Network stations following the 18 April 2008 Illinois earthquake. The technique detected more than 120 aftershocks down to ML 1.0 in the 2 week time window following the mainshock, which is three times more than the number of ...

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