搜索结果: 1-15 共查到“固体地球物理学 variations”相关记录37条 . 查询时间(0.14 秒)
Occurrences, abundances, and compositional variations of cosmic symplectites in the Acfer 094 ungrouped carbonaceous chondrite
cosmic symplectite magnetite Fe,Ni-sulfides Acfer 094 carbonaceous chondrite
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2017/4/10
We describe the petrographic occurrences, abundances, and compositional variations of symplectically intergrown
Fe,Ni-sulfides and 17,18O-rich magnetite (D17O ~ 90‰), named cosmic symplectites (COS; ...
A comparison of f0F hmE model calculations with El Arenosillo digisonde observations. Seasonal variations
Ionospheric E-layer-theoretical modeling solar EUV nitric oxide
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2015/10/8
Seasonal variations of hmE and f0F2 are analyzed using El Arenosillo digisonde observations during solar minimum (1995-1996). Unlike some widely used empirical models daytime hmE show seasonal variati...
The temporal and spatial variations of low frequency geomagnetic pulsations at polar cusp and cap latitudes
Geomagnetic pulsations Antartica
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2015/10/8
Geomagnetic field measurements at two Antarctic stations are compared during two weeks in the local summer (January 1-15, 1992). Low frequency (0.6-6 mHz) pulsations are observed at each station near ...
Space-time variations of the Umbria-Marche region instrumental seismicity
b value seismicity Apennines
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2015/9/29
In the Umbria-Marche region, space and time variations concerning the b value were studied by instrumental seismicity from January 1987 to May 1999, according to the Bender method. Data were divided i...
Could ionospheric variations be precursors of a seismic event? A short discussion
Ionosphere seismic precursors
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2015/9/28
A short review of published papers on the perturbations in the ionosphere due to seismogenic effects is reported. The method to correlate different classes of phenomena as ionospheric variations and s...
Ten years analysis of Tropospheric refractivity variations
troposphere refractivity scaleheight parameter
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2015/9/14
The refractivity variations of the troposphere are responsible for various effects on radio wave propagation, such as refraction, bending, radio-station interference, etc. In this work, the refractivi...
TEC and foF2 variations: preliminary results
ionospheric variability radio wave propagation space and satellite communications
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2015/9/14
Investigation of the relationship between TEC and (foF2)2 shows that although they are highly correlated, a 玥ysteresis?effect exists between them. The slab thickness is greater before than after mid-d...
Association of Total Electron Content (TEC) and foF2 variations with earthquake events at the anomaly crest region
earthquake TEC foF2 anomaly
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2015/9/14
The paper attempts to identify ionospheric parameters in association with earthquake at anomaly crest station through VHF Radio Beacon data and ground based ionosonde measurements while the Total Elec...
Seasonal variations in natural processesand atmospheric precipitation
natural processes seasonal variations precipitation
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2015/9/14
To study the nature of seasonal variations in time series measured at the Garm test site, a local model based on the experimental data of atmospheric precipitation penetration into the soil has been p...
Development of geothermal field following the 2000 eruption of Usu volcano as revealed by ground temperature,resistivity and self-potential variations
Usu volcano geothermal field ground temperature electrical prospecting selfpotential field hydrothermal circulation
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2015/9/2
The 2000 eruption of Usu volcano, NE Japan, took place on the foot of the somma, and formed a cryptodome of 65 m high accompanying numerous faults. We made repeated measurements of ground temperature,...
Variations in geoacoustic emissions in a deep borehole and its correlation with seismicity
geoacoustic emission deep borehole diurnal variation
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2015/9/1
Continuous geoacoustic emission (GAE) measurements were acquired using a three-component geophone
placed in a borehole at a depth of near 1000 m at Petropavlovsk-Kamchatsky starting in August 2000. U...
On the variations of InSAR-ICA altitudes in a mountain area of the Sele Valley (South Italy)
Synthetic Aperture Radar interferometry Independent Component Analysis ground deformations landslides subsidences
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2015/8/28
The ERS-1/ERS-2 Synthetic Aperture Radar (SAR) data are processed by InSAR-ICA technique and the altitude variations are calculated for the period June-December 1995. For the same period and the same ...
Total electron content variations over southern Europe before and during the M 6.3 Abruzzo earthquake of April 6, 2009
GPS network ionospheric total electron content wavelet analysis
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2015/8/24
Total electron content (TEC) data of 14 global positioning system (GPS) stations of the EUREF network were provided by the IONOLAB. These were analyzed using wavelet analysis and discrete Fourier anal...
Midnight variations of spreading of ionospheric sporadic E-layers before earthquakes
earthquake precursors Es-spread data analysis
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2015/8/24
In the present study, ionospheric phenomena caused by earthquakes of magnitudes M >4.0 were investigated. Night-time observations of the spreading of sporadic E-layers (Es-spread) performed every 15 m...
Statistical analysis of automatically detected ion density variations recorded by DEMETER and their relation to seismic activity
Satellite Earthquake interactions and probability
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2015/8/24
Many examples of ionospheric perturbations observed during large seismic events were recorded by the low-altitude satellite DEMETER. However, there are also ionospheric variations without seismic acti...