PERMANENT STATION OF SPACE GEODESY NVSK AND ISKITIM EARTHQUAKES

Seismology and Space-based Geodesy

Relocating a Cluster of Earthquakes Using a Single Seismic Station

Coda waves arise from scattering to form the later arriving components of a seismogram. Coda-wave interferometry (CWI) is an emerging tool for constraining earthquake source properties from the interference pattern of coda waves between nearby events. A new earthquake location algorithm is derived which relies on coda-wave-based probabilistic estimates of earthquake separation. The algorithm ca...

Space - Time Rupture Properties of Large Earthquakes

Slow earthquakes have been hypothesized to be compound events, i.e. comprised of both an ordinary earthquake and a smooth moment-release transient of longer duration. Low-frequency normal-mode based studies which support the compound event hypothesis have suggested that low-frequency source-spectra of some slow earthquakes require that the slow-component initiated before the fast component. We ...

Guy Bomford Prize Lecture 2011 Atmospheric Effects in Space Geodesy

The atmosphere is surrounding the solid Earth and the oceans, and with its variations at time scales from seconds to decades it opens up a wide field of challenging and fascinating tasks in space geodesy. The investigation of these atmospheric effects and the analysis of geodetic Very Long Baseline Interferometry (VLBI) observations have dominated my research in the past decade. Geodetic VLBI w...

Space Station Alpha Joint Bearing

Perhaps the most critical structural system aboard the Space Station is the Solar Alpha Rotary Joint which helps align the power generation system with the sun (Figure 1). The joint must provide structural support and controlled rotation to the outboard transverse booms as well as power and data transfer across the joint. The Solar Alpha Rotary Joint is composed of two transition sections and a...