The ambient seismic wave field, also known as ambient noise, is excited by oceanic gravity
waves primarily. This can be categorized as seismic hum (1–20 mHz), primary microseisms …

We study the origin of the background seismic noise averaged over long time by cross
correlating of the vertical component of motion, which were first normalized by 1‐bit coding …

Earth's background free oscillations, known as Earth's hum, were discovered in 1998.
Excited modes of the oscillations are almost exclusively fundamental spheroidal and toroidal …

Compared with our cousins on the Tree of Life, humans are poor listeners. 1 Below the
lower end of human hearing lies deep infrasound: the realm of thunder and tornadoes …

Seismic interferometry applied to 120 hr of railroad traffic recorded by an array of vertical
component seismographs along a railway within the Rio Grande rift has recovered surface …

Observations show that the seismic normal modes of the Earth at frequencies near 10 mHz
are excited at a nearly constant level in the absence of large earthquakes. This background …

We studied ionospheric responses to the 2012 April 11 M w 8.6 North Sumatra earthquake
using total electron content (TEC) measurements with the regional Global Navigation …

We previously showed that the Earth's “hum” is generated primarily in the northern oceans
during the northern hemisphere winter and in the southern oceans during the summer. To …

Earth's background free oscillations known as Earth's hum have been interpreted as the
Earth response to vertical pressure loads due to atmospheric and/or oceanic disturbances …

Continuous oscillations of the Earth are observed for frequencies between 2 and 7 mHz at
almost every seismically quiet site in the world. These oscillations ride on a broad noise …