In geophysics, geology, civil engineering, and related disciplines, seismic noise is a generic name for a relatively persistent vibration of the ground, due to a multitude of causes, that is often a non-interpretable or unwanted component of signals recorded by seismometers.
Physically, seismic noise arises primarily due to surface or near surface sources and thus consists mostly of elastic surface waves. Low frequency waves (below 1 Hz) are commonly called microseisms and high frequency waves (above 1 Hz) are called microtremors. Primary sources of seismic waves include human activities (such as transportation or industrial activities), winds and other atmospheric phenomena, rivers, and ocean waves.
Seismic noise is relevant to any discipline that depends on seismology, including geology, oil exploration, hydrology, and earthquake engineering, and structural health monitoring. It is often called the ambient wavefield or ambient vibrations in those disciplines (however, the latter term may also refer to vibrations transmitted through by air, building, or supporting structures.)
Seismic noise is often a nuisance for activities that are sensitive to extraneous vibrations, including earthquake monitoring and research, precision milling, telescopes, gravitational wave detectors, and crystal growing. However, seismic noise also has practical uses, including determining the low-strain and time-varying dynamic properties of civil-engineering structures, such as bridges, buildings, and dams; seismic studies of subsurface structure at many scales, often using the methods of seismic interferometry; Environmental monitoring, such as in fluvial seismology; and estimating seismic microzonation maps to characterize local and regional ground response during earthquakes.
In geophysics, geology, civil engineering, and related disciplines, seismicnoise is a generic name for a relatively persistent vibration of the ground...
(in water), or accelerometers. Seismic waves are distinguished from seismicnoise (ambient vibration), which is persistent low-amplitude vibration arising...
reflected seismic waves. The method requires a controlled seismic source of energy, such as dynamite or Tovex blast, a specialized air gun or a seismic vibrator...
the seismicnoise level, and every station will have a characteristic noise pattern that can be calculated or observed. Sources of seismicnoise within...
of changes in seismicnoise)[citation needed], also known as a STA/LTA trigger. Prior to the availability of digital processing of seismic data in the late...
mapping by ambient noise tomography is the mapping underground geological structures under the assistance of seismic signals. Ambient noise, which is not associated...
is most commonly used to refer to the dominant background seismic and electromagnetic noise signals on Earth, which are caused by water waves in the oceans...
process Seismicnoise – generic name for a relatively persistent vibration of the groundPages displaying wikidata descriptions as a fallback Seismic performance...
signal-and-noise orthogonalization algorithm can be used to avoid changes to the signals. Boosting signals in seismic data is especially crucial for seismic imaging...
waveforms. As of 2006 the field of seismic interferometry was beginning to change the way geophysicists view seismicnoise. Seismic interferometry uses this previously–ignored...
Seismic tomography or seismotomography is a technique for imaging the subsurface of the Earth with seismic waves produced by earthquakes or explosions...
including sensors measuring the seismicnoise and actuators controlling the superattenuator to counteract the noise. Part of the light circulating in...
detectors are given by the seismicnoise, the related gravitational gradient noise (so-called Newtonian noise) and the thermal noise of the suspension last...
particularly affected by the amount of seismicnoise that emanated from the Lunar Module. This seismicnoise was the result of venting, fluid circulation...
and seismic exploration by oil and gas industries. Cargo ships generate high levels of noise due to propellers and diesel engines. This noise pollution...
dome away from the drilling rig. Drill-noise VSPs (F), also known as seismic-while-drilling (SWD) VSPs, use the noise of the drill bit as the source and receivers...
field in which unconventional seismic signals can be detected within what was previously considered ‘noise’. Seismicnoise is found across the full spectrum...
Vibrational communication Seismic or vibrational communication is a process of conveying information through mechanical (seismic) vibrations of the substrate...
methods like ambient noise tomography for improved imaging. The study of seismic velocity structure, using the principles of seismic wave propagation, offers...
Seismic data acquisition is the first of the three distinct stages of seismic exploration, the other two being seismic data processing and seismic interpretation...
Seismic magnitude scales are used to describe the overall strength or "size" of an earthquake. These are distinguished from seismic intensity scales that...
Randall R.; Mosbech, Anders (February 2013). "Narwhals and seismic exploration: is seismicnoise increasing the risk of ice entrapments?". Biological Conservation...
diffracted seismic wave fields and this has paved the way for the use of ambient noise for seismic imaging. The first use of seismicnoise for regional-scale...
such as beamforming, which suppress noises and thus enhance the signal-to-noise ratio (SNR). The earliest seismic arrays were built in the 1950s in order...
limited at low frequencies by seismicnoise and other forms of environmental vibration, and other 'non-stationary' noise sources; creaks in mechanical...
A seismic source is a device that generates controlled seismic energy used to perform both reflection and refraction seismic surveys. A seismic source...
interchangeably. The term seismic sea wave is also used to refer to the phenomenon because the waves most often are generated by seismic activity such as earthquakes...
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