Nature of Low‐Frequency, Atmosphere‐Generated Seismic Noise

Seismic noise emission induced by seismic waves

The in situ rock undergoing different kinds of deformation accumulates elastic energy that can be released spontaneously o r under artificial effect. Triggering of energy can also be performed by means of a dynamic excitation caused by elastic waves. W e carried out special field investigations with the use of seismic vibrators (Vibroseis-like sources) to study the effect of the energy release ...

Seismic Noise Trapping in Firn

A comparative analysis was performed on datasets from two Global Seismographic Network (GSN) stations near the South Pole, Antarctica. The results of this analysis are provided and show that there is significant reduction of the background seismic noise generated by the activities at the Amundsen-Scott South Pole Station as a function of distance and depth. Data gathered from site selection wor...

Seismic Gradiometry using Ambient Seismic Noise in an Anisotropic Earth

Event-driven Seismic Interferometry with Ambient Seismic Noise

SUMMARY By cross-correlating recordings of ambient seismic noise, one can retrieve the subsurface reflection response. The quality of the retrieved reflections would depend on the qualities of the ambient noise. In a previous study, we cross-correlated ambient-noise data recorded in a desert area in North Africa and showed that we retrieved reflections. This was done assuming that body-wave noi...

Ocean wave sources of seismic noise

[1] Noise with periods 3 to 10 s, ubiquitous in seismic records, is expected to be mostly generated by pairs of ocean wave trains of opposing propagation directions with half the seismic frequency. Here we present the first comprehensive numerical model of microseismic generation by random ocean waves, including ocean wave reflections. Synthetic and observed seismic spectra are well correlated ...