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Observations of Rotational Motions from Local Earthquakes Using Two Temporary Portable Sensors in Waynoka, Oklahoma

2018; Seismological Society of America; Linguagem: Inglês

10.1785/0120170347

1943-3573

A. T. Ringler, R. E. Anthony, A. A. Holland, David C. Wilson, Chin‐Jen Lin,

Seismic Waves and Analysis

Research Article| October 02, 2018 Observations of Rotational Motions from Local Earthquakes Using Two Temporary Portable Sensors in Waynoka, Oklahoma A. T. Ringler; A. T. Ringler aU.S. Geological Survey, Albuquerque Seismological Laboratory, P.O. Box 82010, Albuquerque, New Mexico 87198‐2010, aringler@usgs.gov Search for other works by this author on: GSW Google Scholar R. E. Anthony; R. E. Anthony aU.S. Geological Survey, Albuquerque Seismological Laboratory, P.O. Box 82010, Albuquerque, New Mexico 87198‐2010, aringler@usgs.gov Search for other works by this author on: GSW Google Scholar A. A. Holland; A. A. Holland aU.S. Geological Survey, Albuquerque Seismological Laboratory, P.O. Box 82010, Albuquerque, New Mexico 87198‐2010, aringler@usgs.govcNow at Sandia National Laboratory. Search for other works by this author on: GSW Google Scholar D. C. Wilson; D. C. Wilson aU.S. Geological Survey, Albuquerque Seismological Laboratory, P.O. Box 82010, Albuquerque, New Mexico 87198‐2010, aringler@usgs.gov Search for other works by this author on: GSW Google Scholar C.‐J. Lin C.‐J. Lin bInstitute of Earth Sciences, Academia Sinica, P.O. Box 1‐55, Nankang, 216, Taipei 115, Taiwan Search for other works by this author on: GSW Google Scholar Author and Article Information A. T. Ringler aU.S. Geological Survey, Albuquerque Seismological Laboratory, P.O. Box 82010, Albuquerque, New Mexico 87198‐2010, aringler@usgs.gov R. E. Anthony aU.S. Geological Survey, Albuquerque Seismological Laboratory, P.O. Box 82010, Albuquerque, New Mexico 87198‐2010, aringler@usgs.gov A. A. Holland aU.S. Geological Survey, Albuquerque Seismological Laboratory, P.O. Box 82010, Albuquerque, New Mexico 87198‐2010, aringler@usgs.govcNow at Sandia National Laboratory. D. C. Wilson aU.S. Geological Survey, Albuquerque Seismological Laboratory, P.O. Box 82010, Albuquerque, New Mexico 87198‐2010, aringler@usgs.gov C.‐J. Lin bInstitute of Earth Sciences, Academia Sinica, P.O. Box 1‐55, Nankang, 216, Taipei 115, Taiwan Publisher: Seismological Society of America First Online: 02 Oct 2018 Online Issn: 1943-3573 Print Issn: 0037-1106 © Seismological Society of America Bulletin of the Seismological Society of America (2018) 108 (6): 3562–3575. https://doi.org/10.1785/0120170347 Article history First Online: 02 Oct 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation A. T. Ringler, R. E. Anthony, A. A. Holland, D. C. Wilson, C.‐J. Lin; Observations of Rotational Motions from Local Earthquakes Using Two Temporary Portable Sensors in Waynoka, Oklahoma. Bulletin of the Seismological Society of America 2018;; 108 (6): 3562–3575. doi: https://doi.org/10.1785/0120170347 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract Characterizing rotational motions from earthquakes at local distances has the potential to improve earthquake engineering and seismic gradiometry by better characterizing the complete seismic wavefield. Applied Technology Associates (ATA) has developed a proto‐seismic magnetohydrodynamic (SMHD) three‐component rotational rate sensor. We deploy two ATA rotational rate sensors at a temporary aftershock station in Waynoka, Oklahoma. From 27 April to 6 June 2017, we recorded the translational and rotational motions of 155 earthquakes of ML≥2.0 within 220 km of the station. Using the recorded events, we compare peak ground rotation rate (⁠PGω˙⁠) with peak ground velocity (PGV) and with peak ground acceleration (PGA). Our results support previously identified potential relationships between the two quantities. We also compare peak ground rotations (⁠PGω⁠) as a function of seismic moment and distance. We found that PGω˙ decays with an exponent of approximately −4.0 km−1 for both horizontal and vertical components. On the other hand, PGA decays with an exponent of approximately −1.8 km−1 for all components. We compute apparent phase velocity directly from the rotational data for both horizontally polarized shear waves (SH; 379 m/s with a standard deviation of 114 m/s⁠) and vertically polarized compression and shear waves (P‐SV; 387 m/s with a standard deviation of 121 m/s⁠). Finally, by comparing various rotational and translational components, we look at potential implications for estimating local event source parameters. We found that the absolute correlation of nearby earthquakes decays at a rate of approximately 0.39/km for rotational sensors. This decay rate of absolute correlation is faster on translational sensors with a decay rate of 0.44/km. The latter may help in identifying phenomena such as repeating earthquakes by using differences in correlations as a function of distance and how these differences compare with translational correlations. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.