搜索结果: 1-15 共查到“地震学 variations”相关记录19条 . 查询时间(0.187 秒)
A comparison of f0F hmE model calculations with El Arenosillo digisonde observations. Seasonal variations
Ionospheric E-layer-theoretical modeling solar EUV nitric oxide
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
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
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
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...
Association of Total Electron Content (TEC) and foF2 variations with earthquake events at the anomaly crest region
earthquake TEC foF2 anomaly
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...
Variations in geoacoustic emissions in a deep borehole and its correlation with seismicity
geoacoustic emission deep borehole diurnal variation
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
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
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
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
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...
Spurious velocity changes caused by temporal variations in ambient noise frequency content
Time-series analysis Interferometry Surface waves and free oscillations Coda waves
2014/4/10
Ambient seismic noise cross-correlations are now being used to detect temporal variations of seismic velocity, which are typically on the order of 0.1 per cent. At this small level, temporal variation...
Isolating along-strike variations in the depth extent of shallow creep and fault locking on the northern Great Sumatran Fault
variations in the depth extent of shallow creep fault locking on the northern Great Sumatran Fault
2014/4/9
The Great Sumatran Fault system in Indonesia is a major right-lateral trench-parallel system that can be divided into several segments, most of which have ruptured within the last century. This study ...
Postseismic variations in seismic moment and recurrence interval of repeating earthquakes
repeating earthquake sequences Parkfield earthquake postseismic process recurrence acceleration rate-and-state models
2014/4/8
In laboratory experiments, longer stationary contact time leads to larger seismic moment during repeated ruptures. However, not all observations in natural fault systems agree with the prediction. We ...
Temporal variations of the fractal properties of seismicity in the western part of the north Anatolian fault zone:possible artifacts due to improvements in station coverage
Temporal variations fractal properties of seismicity north Anatolian fault zone
2009/11/16
Seismically-active fault zones are complex natural systems exhibiting scale-invariant or fractal correlation between earthquakes in space and time, and a power-law scaling of fault length or earthquak...
Temporal Variations of Energy Release by Earthquakes in the Baltic Shield
Temporal Variations Energy Release Earthquakes Baltic Shield
2009/6/15
Temporal Variations of Energy Release by Earthquakes in the Baltic Shield.