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Tornillo seismic events at Galeras volcano, Colombia: a summary and new information from broadband three-component measurements
volcanoes seismic events broadband record tornillos Galeras volcano
2015/10/8
Long-duration events have been recorded at several active, andesitic volcanoes. Their main characteristics are a single, sharp frequency peak, and an exceptionally long coda. Because their seismograms...
The anatomy of a tornillo: puzzles from three-component measurements at Galeras volcano (Colombia)
Galeras tornillo polarizations analytic function parametrization
2015/10/8
Many of the recent ash eruptions of Galeras volcano (Colombia) have been preceded by tornillos. These unusual seismic events of unknown origin have screw-like profiles on seismograms and can last up t...
Potential reasons for ionospheric anomalies detected by nonlinear principal component analysis just before the China Wenchuan earthquake, and their relationship to source conditions
Nonlinear Principal Component Analysis (NLPCA) Principal Component Analysis (PCA) Total Electron Content (TEC),
2015/8/27
Nonlinear principal component analysis (NLPCA) was performed to examine the total electron content (TEC) anomalies for the China Wenchuan earthquake of May 12, 2008 (= 7.9). This was applied to global...
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...
Orbital effects of the time-dependent component of the Pioneer anomaly
Orbital effects the time-dependent component the Pioneer anomaly
2011/8/17
Abstract: We work out the impact that the recently determined time-dependent component of the Pioneer anomalous acceleration may have on the orbital motions of some planets of the solar system in the ...
Characterization of Strombolian events by using independent component analysis
Characterization of Strombolian events independent component analysis
2009/11/11
We apply Independent Component Analysis (ICA) to seismic signals recorded at Stromboli volcano. Firstly, we show how ICA works considering synthetic signals, which are generated by dynamical systems. ...
Study of nonlinear ion- and electron-acoustic waves in multi-component space plasmas
nonlinear ion- and electron-acoustic waves multi-component space plasmas
2009/11/2
Large amplitude ion-acoustic and electron-acoustic waves in an unmagnetized multi-component plasma system consisting of cold background electrons and ions, a hot electron beam and a hot ion beam are s...
Construction of a Scintillation Counter Telescope for the Registration of the Meson Component of Cosmic Rays
Construction Scintillation Counter Telescope Registration Cosmic Rays
2009/6/18
Construction of a Scintillation Counter Telescope for the Registration of the Meson Component of Cosmic Rays.
Monitoring and Analyzing Regional Seismic Events Using a Network of Three-Component Stations
Monitoring Analyzing Regional Seismic Events Network Three-Component Stations
2009/6/15
Monitoring and Analyzing Regional Seismic Events Using a Network of Three-Component Stations.
Inverting geodetic time series with a principal component analysis-based inversion method
Inverting geodetic time series a principal component analysis-based inversion method
2014/4/15
The Global Positioning System (GPS) system now makes it possible to monitor deformation of the Earth’s surface along plate boundaries with unprecedented accuracy. In theory, the spatiotemporal evoluti...
General formulation for analysis methods of three-component, microtremor circular arrays
microtremor phase velocity array observation
2009/3/5
We present general formulation that can compose various methods to determine phase velocities, arriving directions of Rayleigh and Love waves, and particle motions of Rayleigh waves, by using a circul...