| 基于重力观测的巴颜喀拉块体强震震级模拟分析 |
| |
| 作者姓名： | 熊峰 杨彦明 庞博 张小艳 王旭东 杨红樱 |
| |
| 作者单位： | 1.内蒙古自治区地震局，呼和浩特0100102.北京交通大学，北京100044 |
| |
| 基金项目： | 内蒙古自治区地震局局长基金重点项目（2020JP03）资助。 |
| |
| 摘 要： | 以内蒙古乌加河地震台的连续重力观测资料为基础，应用PET重力仪采样率较高的特点，分析了PET相对重力仪与JCZ-1甚宽带地震仪的波形相关关系及同震形变物理特征。通过模拟分析乌加河地震台PET相对重力仪记录到巴颜喀拉块体周围发生的6次7级以上强地震的同震P波、S波及面波与震中距离、震级的相关关系，得出一般震级模型、地应力波模型和S波P波幅度比模型公式。通过计算3种震级模型理论震级与实际震级的误差及相关系数R值，得到理论震级与实测震级标准误差达到0.04，R值达到0.99，验证了模型的可靠性。对比分析理论震级与实际震级的误差与R值，揭示同震形变波形蕴含地球动力特征的物理机制。
|
| 关 键 词： | 重力观测 巴颜喀拉块体 强震震级 同震形变 模拟分析 |
| 收稿时间： | 2021-09-25 |
Simulation analysis of strong earthquake magnitude in Bayankala block based on gravity observation |
| |
| Affiliation: | 1.Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China2.Beijing Jiaotong University, Beijing 100044, China |
| |
| Abstract: | Based on the continuous gravity observation data of Wujiahe seismic station in Inner Mongolia, the waveform correlation between PET relative gravimeter and JCZ-1 very broadband seismometer and the physical characteristics of coseismic deformation are analyzed using the high sampling rate of PET gravimeter. By simulating and analyzing the correlation between the coseismic P-wave, S-wave and surface wave with epicentral distance and magnitude of six strong earthquakes with M≥7 occurred around Bayankala block recorded by PET relative gravimeter at Wujiahe seismic station, the general magnitude model, in-situ stress wave model and S-wave P-wave amplitude ratio model are obtained. By calculating the error and correlation coefficient R value between the theoretical magnitude and the actual magnitude of the three models, the standard error between the theoretical magnitude and the measured magnitude is 0.04, and the R value is 0.99, which verifies the reliability of the model. The error and R value of theoretical magnitude and actual magnitude are compared and analyzed to reveal the physical mechanism of geodynamic characteristics contained in coseismic deformation waveform. |
| |
| Keywords: | |
|
| 点击此处可从《》浏览原始摘要信息 |
|
点击此处可从《》下载全文 |
