Abstract
The Crust and lithosphere Investigation of the Easternmost expression of the Laramide Orogeny was a two-year deployment of 24 broadband, compact posthole seismometers in a linear array across the eastern half of the Wyoming craton. The experiment was designed to image the crust and upper mantle of the region to better understand the evolution of the cratonic lithosphere. In this article, we describe the motivation and objectives of the experiment; summarize the station design and installation; provide a detailed accounting of data completeness and quality, including issues related to sensor orientation and ambient noise; and show examples of collected waveform data from a local earthquake, a local mine blast, and a teleseismic event. We observe a range of seasonal variations in the long-period noise on the horizontal components (15-20 dB) at some stations that likely reflect the range of soil types across the experiment. In addition, coal mining in the Powder River basin creates high levels of short-period noise at some stations. Preliminary results from Ps receiver function analysis, shear-wave splitting analysis, and averaged P-wave delay times are also included in this report, as is a brief description of education and outreach activities completed during the experiment.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1063-1074 |
| Number of pages | 12 |
| Journal | Seismological Research Letters |
| Volume | 93 |
| Issue number | 2A |
| DOIs | |
| State | Published - Mar 1 2022 |
| Externally published | Yes |
Bibliographical note
Funding Information:The authors would like to begin by thanking the people who made this experiment possible, including the numerous landowners who generously provided access to their property during the duration of the two-year experiment, graduate students Gillian Goldhagen and Matthew Mendoza, and a number of dedicated undergraduates (Madeline Churchill, Austin Fimbres, Alan Horton, Jose Lara, Chelsea McCormick, Maxim Shapovalov, David Small, and John Wright) who assisted in installation, service runs, and station removal. The authors would also like to thank the Dakota Water Science Center in Rapid City, South Dakota, and Beth Wisely from Casper College for offering logistical support, the Incorporated Research Institutions for Seismology—Portable Array Seismic Studies of the Continental Lithosphere (IRIS-PASSCAL) Instrument Center for providing power related instrumentation, and Tim Parker (Nanometrics) for training and assistance in the field. The authors would also like to acknowledge the opportunity to work with Hannan Lagarry from Oglala Lakota College as well as the parents, teachers, and students from Hereford Elementary School (K-8) on outreach activities. The authors would also like to thank Kevin Ward and one anonymous reviewer for their helpful comments and suggestions. This work was supported by University of California, Riverside Regents Faculty Fellowship and a Grant in Aid from the University of Minnesota (proposal number 325013). The facilities of the IRIS Consortium are supported by National Science Foundation (NSF) Seismological Facilities for the Advancement of Geoscience (SAGE) Award, Cooperative Support Agreement EAR-1851048.
Funding Information:
The authors would like to begin by thanking the people who made this experiment possible, including the numerous landowners who generously provided access to their property during the duration of the twoyear experiment, graduate students Gillian Goldhagen and Matthew Mendoza, and a number of dedicated undergraduates (Madeline Churchill, Austin Fimbres, Alan Horton, Jose Lara, Chelsea McCormick, Maxim Shapovalov, David Small, and John Wright) who assisted in installation, service runs, and station removal. The authors would also like to thank the Dakota Water Science Center in Rapid City, South Dakota, and Beth Wisely from Casper College for offering logistical support, the Incorporated Research Institutions for Seismology-Portable Array Seismic Studies of the Continental Lithosphere (IRIS-PASSCAL) Instrument Center for providing power related instrumentation, and Tim Parker (Nanometrics) for training and assistance in the field. The authors would also like to acknowledge the opportunity to work with Hannan Lagarry from Oglala Lakota College as well as the parents, teachers, and students from Hereford Elementary School (K-8) on outreach activities. The authors would also like to thank Kevin Ward and one anonymous reviewer for their helpful comments and suggestions. This work was supported by University of California, Riverside Regents Faculty Fellowship and a Grant in Aid from the University of Minnesota (proposal number 325013). The facilities of the IRIS Consortium are supported by National Science Foundation (NSF) Seismological Facilities for the Advancement of Geoscience (SAGE) Award, Cooperative Support Agreement EAR-1851048.
Publisher Copyright:
© 2022 Seismological Society of America.