2022年1月8日青海门源6.9级强地震动模拟研究
作者:
作者单位:

中国地震局兰州地震研究所

作者简介:

通讯作者:

基金项目:

甘肃省科技重大专项“甘肃重点地区地震预测预警新方法与新技术”(21ZD4FA011)


SIMULATION STUDY OF THE 6.9 MAGNITUDE STRONG GROUND MOTION IN MENYUAN, QINGHAI ON JANUARY 8, 2022
Author:
Affiliation:

Lanzhou Institute of Seismology,China Earthquake Administration

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    为满足数字化时代应急处置的新要求,基于随机有限断层法的发展,利用青海门源地区的地下三维速度结构模型和vS30数据,通过逐步迭代射线追踪法、格林函数位移解析相位谱和有限断层法的联合计算,以青海门源6.9级地震为例,获得了具有地表土层放大效应的强地震动模拟数据,进而绘制出研究区内PGA和烈度分布模拟图。与实际台站记录的PGA和实地调查烈度结果相比,烈度区划范围基本一致,同时也验证了此联合计算方法可用于未来地震灾害的快速评估,并为灾后应急救援提供参考。

    Abstract:

    In this study, to meet the new requirements of emergency response in the digital age, we developed a method based on the stochastic finite fault modeling. Using the subsurface three-dimensional velocity structure model and vS30 data from the Menyuan region of Qinghai Province, we applied the step by step iterative ray-tracing method, the Green"s function displacement analytical solution of phase spectra and the finite fault method to calculate strong ground motion simulation data with amplification response at the ground surface. Taking the 6.9 magnitude earthquake in Menyuan, Qinghai as an example, we created PGA and intensity distribution simulation maps for the study area. Comparing these simulated results with actual PGA records from monitoring stations and the field intensity survey, we found that the intensity zonation ranges are basically consistent. This process also verified that this method can be utilized for the rapid assessment of future earthquake disasters, thereby providing a reference for the post-disaster emergency rescue.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
历史
  • 收稿日期:2023-09-20
  • 最后修改日期:2023-12-06
  • 录用日期:
  • 在线发布日期: 2024-03-28