Seasonal and diurnal variations in long-period noise at SPREE stations: The influence of soil characteristics on shallow stations’ performance

Emily Wolin, Suzan van der Lee, Trevor A. Bollmann, Douglas A. Wiens, Justin Revenaugh, Fiona A. Darbyshire, Andrew W. Frederiksen, Seth Stein, Michael E. Wysession

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The Superior Province Rifting Earthscope Experiment (SPREE) recorded continuous seismic data over the Midcontinent Rift from April 2011 through October 2013. Analysis of power spectral density (PSD) estimates shows that horizontal noise levels at periods > 20 s vary seasonally and diurnally. During winter, horizontal noise power at many SPREE stations is within 5 dB of nearby Transportable Array (TA) stations. As the ground thaws, SPREE stations in fine-grained material such as silt or clay become noisier due to changes in the mechanical properties of the soil. During summer, the daily mean PSD value of stations in fine-grained material is approximately 10–20 dB higher than in the winter, and daytime noise levels are 20–30 dB higher than nights. Stations in sandy material also show diurnal variations of 20–30 dB during summer, but the daily mean PSD value varies no more than 5–10 dB during the year. Most neighboring TA stations have relatively constant daily mean PSDs, and their horizontal components show summer diurnal variations of 10–15 dB. Some very quiet TA stations, such as SPMN, show a 5–10 dB increase in horizontal noise power during winter. The timing and amplitude of horizontal noise power variations between 20 and 800 s correlate with variations in atmospheric pressure PSDs. We propose that the grain size and pore water content of the material surrounding a shallow seismic station influences the local response to atmospheric pressure. Stations that must be placed in soft sediments should be installed in sandy, well-drained material to minimize long-period noise generated by atmospheric pressure variations.

Original languageEnglish (US)
Pages (from-to)2433-2452
Number of pages20
JournalBulletin of the Seismological Society of America
Volume105
Issue number5
DOIs
StatePublished - Oct 2015

Fingerprint

diurnal variations
annual variations
diurnal variation
rifting
soils
seasonal variation
stations
Soils
Power spectral density
Atmospheric pressure
soil
experiment
Experiments
winter
atmospheric pressure
summer
Silt
Water content
Sediments
station

Keywords

  • And their differences
  • Figures with examples of signals
  • Power spectra

Cite this

Seasonal and diurnal variations in long-period noise at SPREE stations : The influence of soil characteristics on shallow stations’ performance. / Wolin, Emily; van der Lee, Suzan; Bollmann, Trevor A.; Wiens, Douglas A.; Revenaugh, Justin; Darbyshire, Fiona A.; Frederiksen, Andrew W.; Stein, Seth; Wysession, Michael E.

In: Bulletin of the Seismological Society of America, Vol. 105, No. 5, 10.2015, p. 2433-2452.

Research output: Contribution to journalArticle

Wolin, Emily ; van der Lee, Suzan ; Bollmann, Trevor A. ; Wiens, Douglas A. ; Revenaugh, Justin ; Darbyshire, Fiona A. ; Frederiksen, Andrew W. ; Stein, Seth ; Wysession, Michael E. / Seasonal and diurnal variations in long-period noise at SPREE stations : The influence of soil characteristics on shallow stations’ performance. In: Bulletin of the Seismological Society of America. 2015 ; Vol. 105, No. 5. pp. 2433-2452.
@article{35d097133a7c4eb88a37699fba75339b,
title = "Seasonal and diurnal variations in long-period noise at SPREE stations: The influence of soil characteristics on shallow stations’ performance",
abstract = "The Superior Province Rifting Earthscope Experiment (SPREE) recorded continuous seismic data over the Midcontinent Rift from April 2011 through October 2013. Analysis of power spectral density (PSD) estimates shows that horizontal noise levels at periods > 20 s vary seasonally and diurnally. During winter, horizontal noise power at many SPREE stations is within 5 dB of nearby Transportable Array (TA) stations. As the ground thaws, SPREE stations in fine-grained material such as silt or clay become noisier due to changes in the mechanical properties of the soil. During summer, the daily mean PSD value of stations in fine-grained material is approximately 10–20 dB higher than in the winter, and daytime noise levels are 20–30 dB higher than nights. Stations in sandy material also show diurnal variations of 20–30 dB during summer, but the daily mean PSD value varies no more than 5–10 dB during the year. Most neighboring TA stations have relatively constant daily mean PSDs, and their horizontal components show summer diurnal variations of 10–15 dB. Some very quiet TA stations, such as SPMN, show a 5–10 dB increase in horizontal noise power during winter. The timing and amplitude of horizontal noise power variations between 20 and 800 s correlate with variations in atmospheric pressure PSDs. We propose that the grain size and pore water content of the material surrounding a shallow seismic station influences the local response to atmospheric pressure. Stations that must be placed in soft sediments should be installed in sandy, well-drained material to minimize long-period noise generated by atmospheric pressure variations.",
keywords = "And their differences, Figures with examples of signals, Power spectra",
author = "Emily Wolin and {van der Lee}, Suzan and Bollmann, {Trevor A.} and Wiens, {Douglas A.} and Justin Revenaugh and Darbyshire, {Fiona A.} and Frederiksen, {Andrew W.} and Seth Stein and Wysession, {Michael E.}",
year = "2015",
month = "10",
doi = "10.1785/0120150046",
language = "English (US)",
volume = "105",
pages = "2433--2452",
journal = "Bulletin of the Seismological Society of America",
issn = "0037-1106",
publisher = "Seismological Society of America",
number = "5",

}

TY - JOUR

T1 - Seasonal and diurnal variations in long-period noise at SPREE stations

T2 - The influence of soil characteristics on shallow stations’ performance

AU - Wolin, Emily

AU - van der Lee, Suzan

AU - Bollmann, Trevor A.

AU - Wiens, Douglas A.

AU - Revenaugh, Justin

AU - Darbyshire, Fiona A.

AU - Frederiksen, Andrew W.

AU - Stein, Seth

AU - Wysession, Michael E.

PY - 2015/10

Y1 - 2015/10

N2 - The Superior Province Rifting Earthscope Experiment (SPREE) recorded continuous seismic data over the Midcontinent Rift from April 2011 through October 2013. Analysis of power spectral density (PSD) estimates shows that horizontal noise levels at periods > 20 s vary seasonally and diurnally. During winter, horizontal noise power at many SPREE stations is within 5 dB of nearby Transportable Array (TA) stations. As the ground thaws, SPREE stations in fine-grained material such as silt or clay become noisier due to changes in the mechanical properties of the soil. During summer, the daily mean PSD value of stations in fine-grained material is approximately 10–20 dB higher than in the winter, and daytime noise levels are 20–30 dB higher than nights. Stations in sandy material also show diurnal variations of 20–30 dB during summer, but the daily mean PSD value varies no more than 5–10 dB during the year. Most neighboring TA stations have relatively constant daily mean PSDs, and their horizontal components show summer diurnal variations of 10–15 dB. Some very quiet TA stations, such as SPMN, show a 5–10 dB increase in horizontal noise power during winter. The timing and amplitude of horizontal noise power variations between 20 and 800 s correlate with variations in atmospheric pressure PSDs. We propose that the grain size and pore water content of the material surrounding a shallow seismic station influences the local response to atmospheric pressure. Stations that must be placed in soft sediments should be installed in sandy, well-drained material to minimize long-period noise generated by atmospheric pressure variations.

AB - The Superior Province Rifting Earthscope Experiment (SPREE) recorded continuous seismic data over the Midcontinent Rift from April 2011 through October 2013. Analysis of power spectral density (PSD) estimates shows that horizontal noise levels at periods > 20 s vary seasonally and diurnally. During winter, horizontal noise power at many SPREE stations is within 5 dB of nearby Transportable Array (TA) stations. As the ground thaws, SPREE stations in fine-grained material such as silt or clay become noisier due to changes in the mechanical properties of the soil. During summer, the daily mean PSD value of stations in fine-grained material is approximately 10–20 dB higher than in the winter, and daytime noise levels are 20–30 dB higher than nights. Stations in sandy material also show diurnal variations of 20–30 dB during summer, but the daily mean PSD value varies no more than 5–10 dB during the year. Most neighboring TA stations have relatively constant daily mean PSDs, and their horizontal components show summer diurnal variations of 10–15 dB. Some very quiet TA stations, such as SPMN, show a 5–10 dB increase in horizontal noise power during winter. The timing and amplitude of horizontal noise power variations between 20 and 800 s correlate with variations in atmospheric pressure PSDs. We propose that the grain size and pore water content of the material surrounding a shallow seismic station influences the local response to atmospheric pressure. Stations that must be placed in soft sediments should be installed in sandy, well-drained material to minimize long-period noise generated by atmospheric pressure variations.

KW - And their differences

KW - Figures with examples of signals

KW - Power spectra

UR - http://www.scopus.com/inward/record.url?scp=84943279542&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84943279542&partnerID=8YFLogxK

U2 - 10.1785/0120150046

DO - 10.1785/0120150046

M3 - Article

AN - SCOPUS:84943279542

VL - 105

SP - 2433

EP - 2452

JO - Bulletin of the Seismological Society of America

JF - Bulletin of the Seismological Society of America

SN - 0037-1106

IS - 5

ER -