Thread: IRIS WEBINAR: Three Types of Noise Sources Recorded on Seismometers - 10/17, 2 PM EDT

Started: 2018-10-11 19:22:34
Last activity: 2018-10-11 19:22:34
Topics: Webinars
You may register for "Three Types of Noise Sources Recorded on
Seismometers: An Overview of Impacts and Applications" on Wednesday,
October 17, 2018 @ 2:00 PM EDT
at: https://register.gotowebinar.com/register/7463454537072083457

Presented by: Dr. Robert E. Anthony, USGS, Albuquerque Seismological
Laboratory

Abstract: In the absence of earthquakes, seismometers record a wide
range of signals generated from both natural and anthropogenic sources
as well as from the instruments themselves. As these signals interfere
with our ability to record earthquakes, they have been lumped together
and given the term “noise.” Conceptually, these noise sources can be
divided into the broad categories of (1) self-noise of seismic
instruments, (2) non-seismic noise sources, and (3) non-earthquake
sources of seismic energy. The self-noise of the seismometer and
digitizer arises through both their electronics and thermally induced
motions on the mass of the seismometer. Self-noise often increases
drastically at lower frequencies. Non-seismic noise sources arise
because seismic instruments are sensitive to environmental conditions
such as thermal variations, magnetic fields, and changes in pressure.
Finally, non-earthquake sources of seismic energy are being constantly
recorded on seismic instruments across the planet. These arise from a
multitude of naturally occurring surface processes (swell in large
bodies of water, bedload transport in rivers, wind, etc.) as well as
cultural activities. Recently, these signals have found applications in
both seismic imaging as well investigating the processes generating
them. In this webinar, I will discuss how these three types of noise
sources are characterized. I will provide examples, some steps that can
be taken to mitigate them, and touch on recent work using background
noise to understand oceanic, atmospheric, and earth surface processes.

After registering, you will receive a confirmation email containing
information about joining the webinar. Webinars are archived for later
viewing at https://www.youtube.com/playlist?list=PLD4D607C2FA317E6D

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