Temporal variations in Global Seismic Stations ambient noise power levels

Seismological Research Letters
By: , and 



Recent concerns about time-dependent response changes in broadband seismometers have motivated the need for methods to monitor sensor health at Global Seismographic Network (GSN) stations. We present two new methods for monitoring temporal changes in data quality and instrument response transfer functions that are independent of Earth seismic velocity and attenuation models by comparing power levels against different baseline values. Our methods can resolve changes in both horizontal and vertical components in a broad range of periods (∼0.05 to 1,000 seconds) in near real time. In this report, we compare our methods with existing techniques and demonstrate how to resolve instrument response changes in long-period data (>100 seconds) as well as in the microseism bands (5 to 20 seconds).

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Temporal variations in Global Seismic Stations ambient noise power levels
Series title Seismological Research Letters
DOI 10.1785/​gssrl.81.4.605
Volume 81
Issue 4
Year Published 2010
Language English
Publisher GeoScienceWorld
Publisher location Alexandria, VA
Contributing office(s) Albuquerque Seismological Laboratory, National Earthquake Information Center
Description 9 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Seismological Research Letters
First page 605
Last page 613
Country United States
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