基于使用深度钻井数据的质量因子反转的结晶岩基岩地点地震现场响应的特征和控制因素
Naoki Nishizaka1,2, Hiroaki Sato3, Takeshi Tsuji4
1Civil & Architectural Engineering Department, Shikoku Electric Power Co., Inc., 2-5, Marunouchi, Takamastu, 760-8573, Japan. nishizaka14981@yonden.co.jp.
Scientific reports
|April 17, 2025
概括
这项研究使用深孔数据分析了水晶岩基岩地点的地震现场反应. 研究结果揭示了剪切波速度和质量因子概况如何影响跨频率的地震波放大.
科学领域:
- 地质物理学 地质物理学
- 地震学 地震学
- 地震工程的工程是地震工程.
背景情况:
- 了解地震现场反应对于准确的地震危险评估至关重要.
- 描述晶体基岩的位置需要对地震波传播进行详细的分析.
- 剪切波速度 (Vs) 和剪切波质量因子 (Qs) 档案的认识不确定性需要评估.
研究的目的:
- 调查在晶体岩石基层的地震现场响应的特征和控制因素.
- 在剪切波速度 (Vs) 配置文件中评估认识系统的不确定性.
- 评估横跨宽带频率的剪波质量因子 (Qs) 配置文件的变化.
主要方法:
- 利用深度钻井数据到2000米的地震基岩.
- 进行了多次入侵测量以估计VS概况.
- 采用了一个逻辑树,对光谱比率Qs反转和放大因子 (AF) 分析采用了128个分析模式.
主要成果:
- 在2000米至5米的AF中,减弱效应在1Hz以上占主导地位.
- Qs 配置文件显著影响了低于 2 Hz 和高于 15 Hz 的地震响应.
- Vs 配置文件显示,在 2 Hz 和 15 Hz 之间对地震响应有显著影响.
结论:
- 由于广泛的测量和地震记录限制,中位AF曲线显示出强度.
- 这项研究提供了关于水晶岩基岩现场本地现场反应的宝贵数据.
- 预计这些发现将有助于对地震危险的评估,作为结晶岩基岩地点的参考.
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