Data for: Kroll and Cochran, 2024, Cyclic Injection Leads to Larger and More Frequent Induced Earthquakes Under Volume-Controlled Conditions, Seismoloigcal Research Letters

Supplemental Material for: “Cyclic Injection Lead to Larger and More Frequent Induced Earthquakes” Seismological Research Letters, submitted 2023. Kayla A. Kroll and Elizabeth S. Cochran These are the 2000 unique synthetic seismicity catalogs that were produced for the work to understand the impact of constant rate versus cyclically varying injection rates on seismicity. These catalogs were developed by considering the following: · Two injection histories o Constant rate injection (hereinafter referred to as “constant”) of 0.008 m^2/s for 70 years o Fluctuating injection (hereinafter referred to as “cyclic”) at a rate of 0.014 m^2/s for 10 year intervals § Injection rate of 0.014 m^2/s applied between 0-10 years, 20-30 years, 40-50 years, 60-70 years § Injection rate of 0.00 m^2/s applied between 10-20 years, 30-40 years, 50-60 years, 70+ years · Two values of the average pre-existing shear stress (hereinafter referred to as “initTau”) o initTau = 16 MPa o initTau = 17 MPa · 500 unique realizations of the pattern of the pre-existing shear stress. These patterns are generated using the von Karman auto-correlation function which can be reconstructed with 4 parameters: Hurst exponent (H), correlation length (axay), standard deviation of the amplitude of the heterogeneity (Asd), and the seed value used in the random number generator. The algorithm PSUADE (https://computing.llnl.gov/projects/psuade) was used in Design of Experiments manner to determine 100 unique combinations of the independent/physical variables (H, axay, and Asd). These combinations were then repeated over 5 values of the categorical parameter (the seed term). We use a quasi Monte Carlo method for deriving the sampling combinations with draws from uniform probability distributions in the following ranges for each parameter: o 0 < H < 1 o 30m < axay < 10000m o 1 MPa < Asd < 5 MPa (~0.3initTau) · The name of each catalog in this repository is coded to indicate which injection strategy was applied (e.g. Cyclic or fluctuating), the value of the average initial pre-existing shear stress (e.g. initTau), and the statistical properties of the von Karman distribution (e.g. H, axay, Asd, seed).《循环注水诱发更大更频发的诱发地震》补充材料，《地震研究快报》，2023年投稿 Kayla A. Kroll 与 Elizabeth S. Cochran 本数据集包含为探究恒定注水速率与循环变化注水速率对诱发地震活动的影响而生成的2000套独立合成地震活动目录。 本批目录的构建基于以下设置： ● 2种注水历史方案 ○ 恒定速率注水（下文简称"恒定注水"）：注水速率为0.008 m²/s，持续70年 ○ 周期性波动注水（下文简称"循环注水"）：以0.014 m²/s的速率按10年周期交替运行 ■ 注水时段：0~10年、20~30年、40~50年、60~70年采用0.014 m²/s的注水速率 ■ 停注时段：10~20年、30~40年、50~60年、70年及以后采用0.00 m²/s的注水速率 ● 2组初始固有剪切应力平均值（下文简称"initTau"） ○ initTau = 16 MPa ○ initTau = 17 MPa ● 500套独立的固有剪切应力空间分布实现样本。此类分布基于冯·卡门（von Karman）自相关函数生成，该函数可通过4个参数重构：赫斯特指数（Hurst exponent, H）、相关长度（correlation length, axay）、非均质性振幅标准差（heterogeneity amplitude standard deviation, Asd）以及随机数生成器所用的种子值。本次研究采用实验设计（Design of Experiments, DoE）方法，通过PSUADE算法（https://computing.llnl.gov/projects/psuade）获取100组独立物理变量（H、axay、Asd）的唯一组合；将每组变量组合对应5个分类参数（种子值）的取值，完成重复采样。本次采样组合推导采用准蒙特卡洛方法，各参数的采样范围均取自均匀概率分布，具体范围如下： ○ 0 < H < 1 ○ 30 m < axay < 10000 m ○ 1 MPa < Asd < 5 MPa（约为0.3倍initTau） ● 本数据集内每套目录的文件名均采用编码规则，用于标识所采用的注水策略（如循环注水/周期性波动注水）、初始固有剪切应力平均值（如initTau）以及冯·卡门分布的统计参数（如H、axay、Asd、种子值）。