To acquire new knowledge through earthquake ground motion evaluation from a perspective, the authors attempted to create site-specific model by machine learning using records obtained in past as training data. The epicentral direction and response duration time of motion, which had not been addressed conventional attenuation relations, were also examined. Overall, observed values evaluated mode...

We present observations on a new precursory phase of seismic waves scattered in the deep Earth. This arrives prior to PKPab wave at epicentral distances larger than 155°, and we call it precursor. show that presence precursor is necessary consequence scattering D?, which commonly accepted cause PKPdf smaller 145°. propagate through inner core should arrive before but those, are strongly attenua...

distance-balanced graphs are introduced as graphs in which every edge uv has the followingproperty: the number of vertices closer to u than to v is equal to the number of vertices closerto v than to u. basic properties of these graphs are obtained. in this paper, we study theconditions under which some graph operations produce a distance-balanced graph.

Determining the thickness of Europa's outer ice shell is a key factor for understanding internal dynamics, evolution, and potential habitability. As such, one primary goals any future lander mission to Europa would be constrain confirm presence global subsurface ocean. Tidally induced fracturing events provide natural source seismic energy illuminate subsurface, thus instrument onboard could pr...