搜索结果: 1-15 共查到“地球物理学 propagation”相关记录23条 . 查询时间(0.125 秒)
Computer animation as a tool to visualize effects of seismic wave propagation inside heterogeneous media
computer animations numerical modelling seismic wave propagations
2015/9/30
A technique to make computer animations representing the propagation of antiplane shear waves in heterogeneous dissipative media is presented. The aim is to develop a useful tool to better investigate...
Proposals are made for Earth-space and space-space paths to apply the term ?propagation degradation probability?, analogous to ?basic circuit reliability? adopted within the Radiocommunication Sector ...
Nowcasting, forecasting and warning for ionospheric propagation: tools and methods
Nowcasting ionospheric propagation
2015/9/14
The paper reviews the work done in the course of the COST 271 Action concerned with the development of tools and methods for forecasting, nowcasting and warning of ionospheric propagation conditions. ...
Total electron content - A key parameterin propagation: measurement and usein ionospheric imaging
parameterin ionosphere
2015/9/14
The paper reports on a series of studies carried out within the COST 271 Action relating to the measurement and use of Total Electron Content (TEC) of the ionosphere over North West Europe.
Total ele...
Planetary and gravity wave signatures in the F-region ionosphere with impacton radio propagation predictionsand variability
Radio propagation ionization
2015/9/14
The aim of this work within the WP 3.1 of the COST 271 Action is the characterization of the variability introduced in the F-region ionosphere by -Planetary Wave Signatures- (PWS) and -Gravity Wave
S...
Modeling the dynamic rupture propagation on heterogeneous faults with rate- and state-dependent friction
dynamic rupture fault constitutive law fault friction stress heterogeneities
2015/9/10
We investigate the effects of non-uniform distribution of constitutive parameters on the dynamic propagation of
an earthquake rupture. We use a 2D finite difference numerical method and we assume tha...
3D dynamic simulations of spontaneous rupture propagation governed by different constitutive laws with rake rotation allowed
earthquake dynamics numerical modeling friction laws slip time history rake rotation
2015/9/10
In this work we present a 3D Finite Difference numerical method to model the dynamic spontaneous propagation
of an earthquake rupture on planar faults in an elastic half-space. We implement the Tract...
Aspects of HF radio propagation
Ionospheric propagation mid-latitude trough radiolocation propagation modelling backscatter sounding
2015/8/28
radio systems. From the point of view Working Group 2 of the COST 296 Action, interest lies with effects associated with propagation via the ionosphere of signals within the HF band. Several aspects a...
Azimuthal propagation of seismo-magnetic signals from large earthquakes in Taiwan
earthquake emission frequency wavenumber method earthquake forecast
2015/8/24
This study uses a network that is comprised of 10 total intensity magnetometers to detect azimuthal propagation of seismo-magnetic emission waves during 26 earthquakes that occurred between July 2007 ...
Possible precursor to the March 11, 2011, Japan earthquake: ionospheric perturbations as seen by subionospheric very low frequency/low frequency propagation
Earthquake predictio Ionospheric perturbatio VLF/LF propagation
2015/8/24
This study reports on a possible very low frequency/low frequency (VLF/LF) subionospheric precursor to a recent earthquake in Japan. As the epicenter of this large Japanese earthquake on March 11, 201...
Ionospheric perturbations associated with two huge earthquakes in Japan, using principal component analysis for multiple subionospheric VLF/LF propagation paths
Ionospheric perturbations Earthquakes Subionospheric VLF/LF propagation
2015/8/24
The presence of ionospheric perturbations in possible association with two huge earthquakes (Noto-hanto peninsula and Niigata-chuetu-oki earthquakes) in 2007 was studied on the basis of a conventional...
Orographic role in anomalous VHF propagation on the background of impending earthquakes (EQ)
Orography EQ and VHF anomalous propagation Earthquake RRI Terrain features
2015/8/14
The role of orographic factors in modifying atmospheric dynamics on the background of an impending earthquake (EQ) that might lead to propagation of a signal beyond the Line Of Sight (LOS) is examined...
An Earthquake Source Sensitivity Analysis for Tsunami Propagation in the Eastern Mediterranean
Earthquake Source Sensitivity Tsunami Propagation
2015/7/17
Accurate earthquake source parameters are essential input to tsunami hazard assessment and mitigation, including early warning systems. It is difficult to make accurate assumptions of earthquake sourc...
Regional wave propagation using the discontinuous Galerkin method
Galerkin area had a continuous wave propagation unstructured tetrahedral mesh integration higher derivative simulate the high frequency wave field propagation distance
2015/1/5
We present an application of the discontinuous Galerkin (DG) method to regional wave propagation. The method makes use of unstructured tetrahedral meshes, combined with a time integration scheme solvi...
Knickpoint formation, rapid propagation, and landscape response following coastal cliff retreat at the last interglacial sea-level highstand: Kaua‘i, Hawai‘i
Knickpoint formation rapid propagation landscape response following coastal cliff retreat last interglacial sea-level highstand: Kaua‘i Hawai‘i
2014/4/8
Upstream knickpoint propagation is an important mechanism for channel incision,and it communicates changes in climate, sea level, and tectonics throughout a landscape.Few studies have directly measure...