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• W2775441490 abstract "Research Article| December 13, 2017 Ground Motion from M 1.5 to 3.8 Induced Earthquakes at Hypocentral Distance < 45 km in the Montney Play of Northeast British Columbia, Canada Alireza Babaie Mahani; Alireza Babaie Mahani aGeoscience BC, 1101‐750 West Pender Street, Vancouver, British Columbia, Canada V6C 2T7, ali.mahani@mahangeo.com Search for other works by this author on: GSW Google Scholar Honn Kao Honn Kao bPacific Geoscience Center, Geological Survey of Canada, 9860 West Saanich Road, Sidney, British Columbia, Canada V8L 4B2 Search for other works by this author on: GSW Google Scholar Author and Article Information Alireza Babaie Mahani aGeoscience BC, 1101‐750 West Pender Street, Vancouver, British Columbia, Canada V6C 2T7, ali.mahani@mahangeo.com Honn Kao bPacific Geoscience Center, Geological Survey of Canada, 9860 West Saanich Road, Sidney, British Columbia, Canada V8L 4B2 Publisher: Seismological Society of America First Online: 13 Dec 2017 Online Issn: 1938-2057 Print Issn: 0895-0695 © Seismological Society of America Seismological Research Letters (2018) 89 (1): 22–34. https://doi.org/10.1785/0220170119 Article history First Online: 13 Dec 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Alireza Babaie Mahani, Honn Kao; Ground Motion from M 1.5 to 3.8 Induced Earthquakes at Hypocentral Distance < 45 km in the Montney Play of Northeast British Columbia, Canada. Seismological Research Letters 2017;; 89 (1): 22–34. doi: https://doi.org/10.1785/0220170119 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 SocietySeismological Research Letters Search Advanced Search ABSTRACT Ground‐motion amplitudes from small potentially induced earthquakes in the Montney Play of northeast British Columbia (MP BC) are used to evaluate the site condition, attenuation, and strong‐motion duration. The dataset includes waveforms from 219 events with local magnitude ranging from 1.5 to 3.8 recorded at hypocentral distance <45 km by the local seismographic stations operated by energy companies, complemented with some waveforms from the regional seismographic stations of the Canadian National Seismic Network. Horizontal‐to‐vertical (H/V) spectral ratio of ground‐motion results in amplification factors of 2.5–7.9 (0.4–0.9 in log unit) and 1.6–12.6 (0.2–1.1 in log unit) for seismographic stations in the Graham and Septimus areas, respectively. Following the Hassani and Atkinson (2016) methodology, VS30 values are estimated for each seismographic station using the fundamental frequency associated with the peak H/V ratios. In this study, ground‐motion prediction equations (GMPEs) are obtained for the Graham and Septimus areas for the entire magnitude range (1.5–3.8) and for the combined dataset for magnitudes above 2.5. The obtained geometrical spreading coefficients for the Graham area suggest higher decay in ground‐motion amplitudes than those in the Septimus area for the peak ground velocity (PGV), peak ground acceleration (PGA), and response spectral acceleration (PSA) at frequency of 10 Hz, whereas the difference is insignificant at lower frequencies. Although, the geometrical attenuation of ground‐motion amplitudes for magnitudes above 2.5 is higher than Atkinson (2015) for PGV and PGA, it is comparable for PSA at frequencies 1, 2, 3.3, 5, and 10 Hz. Duration of the strong ground motion for waveforms with PGA>1 cm/s2 is also calculated from two widely used methods (bracketed [Db] and significant [Ds] durations). Both Db and Ds are strongly correlated with PGA (⁠Db increases while Ds decreases with PGA). Moreover, Db appears to be correlated with magnitude (increases with M⁠), whereas Ds is correlated with distance (increases with hypocentral distance). Although the database in this study includes waveforms with relatively large ground acceleration (PGA of ∼115 cm/s2 from an M 3 event), duration of the strong ground motion is, however, very short at higher acceleration levels (e.g., 50 cm/s2⁠) with a typical value of a fraction of a second. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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• W2775441490 title "Ground Motion from M 1.5 to 3.8 Induced Earthquakes at Hypocentral Distance < 45 km in the Montney Play of Northeast British Columbia, Canada" @default.
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