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首页> 外文期刊>Seismological research letters >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
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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

机译：从M 1.5到3.8诱导地震的地面行动在Hypocentral距离中的距离（Montney）距离加拿大英国哥伦比亚州东北山的蒙特尼比赛中距离<45公里

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摘要

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. Horizon-tal-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, V_(S30) 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/s~2 is also calculated from two widely used methods (bracketed [D_b] and significant [D_s] durations). Both and D_s are strongly correlated with PGA (D_b increases while D_s decreases with PGA). Moreover, D_b, appears to be correlated with
机译：来自小潜在诱导的蒙特尼的地震巨大地震在蒙特尼的东北哥伦比亚（MP BC）中的剧集中，用于评估现场条件，衰减和强运动持续时间。该数据集包括从备用的219个事件的波形，从1.5到3.8记录在斜视距离<45公里的能源公司，辅助加拿大国家地震网络区域地震站的一些波形。地面运动的地平 - 倾斜（H / V）光谱比率在放大因子为2.5-7.9（日志单元中0.4-0.9）和1.6-12.6（在日志单元中为0.2-1.1），用于地震站格雷厄姆和塞塞米斯地区分别。在Hassani和Atkinson（2016）方法之后，使用与峰值H / V比率相关的基本频率估计每个地震站的V_（S30）值。在该研究中，为整个幅度范围（1.5-3.8）的Graham和Septimus区域获得地面运动预测等式（GMPE），并为2.5高于2.5的大小的组合数据集。所获得的Graham地区的几何扩展系数表明，在峰值接地速度（PGV），峰接地加速度（PGA）和频率为10的峰值接地加速度（PGA）和响应光谱加速度（PSA）的静脉内部区域中的衰减较高Hz，而差异在较低频率下是微不足道的。尽管，用于高于2.5的幅度的地面运动幅度的几何衰减高于Atkinson（2015），用于PGV和PGA，在频率1,2,3.3,5和10Hz时对PSA相当。使用PGA> 1cm / s〜2的波形的强接地运动的持续时间也从两个广泛使用的方法（括号[D_B]和显着的[D_S]持续时间）计算。两者和d_s与PGA强烈相关（D_B增加而D_S用PGA减少）。此外，D_B似乎与之相关

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