Raton Basin Induced Seismicity Is Hosted by Networks of Short Basement Faults and Mimics Tectonic Earthquake Statistics

Raton Basin Induced Seismicity Is Hosted by Networks of Short Basement Faults and Mimics Tectonic Earthquake Statistics
复制标题

拉顿盆地诱发地震活动由短基底断层网络和模拟构造地震统计主持

DOI:
10.1029/2021jb022839
复制
发表时间:
2021
期刊:
Journal of Geophysical Research: Solid Earth
影响因子:
--
通讯作者:
Kiser, E.
Kiser, E.
中科院分区:
--
文献类型:
--
作者:
Glasgow, M.;Schmandt, B.;Wang, R.;Zhang, M.;Bilek, S. L.;Kiser, E.

文献摘要

参考文献

被引文献

相似文献

在过去的二十年里,Raton盆地一直是一个注入诱发地震活动性的地区。以前,由于缺乏公开的地震监测,重新激活的断裂带结构和地震活动性对不断变化的注入的时空响应受到了很好的约束。将机器学习相位选择器应用于来自本地阵列的4年连续地震数据,可以检测和定位约38,000次地震。2016 - 2020年的事件在海平面以下~ 2.5-6 km,范围为ML<−1 ~ 4.2。大多数地震发生在以前确定的地震活动性的~ N‐S带,但是我们的新目录说明,这些带是由许多短断层与可变的方向组成的。两个最活跃的带,Vermejo Park和Tercio带,可能被小的中间断裂连接起来。总的来说,我们发现了约60条短(<3 km长)基底断层,走向从WNW到NNE。断裂机制主要是正常的,但也观察到一些变异性,包括逆倾滑和斜滑。特立尼达断裂带之前曾在2011年发生过一次Mw5.3级地震,在2016 - 2020年期间处于静止状态,可能是由于2011年序列后构造应变的缓慢积累,以及2012年至2016年附近废水注入量的显著减少(减少80%)。与其他一些地区不同,在这些地区,较高的注入速率会触发诱发地震活动,而Raton盆地的频率震级和时空统计数据与构造地震活动无法区分。这种相似性表明,拉顿盆地的地震活动主要是释放构造应力。
The Raton Basin has been an area of injection induced seismicity for the past two decades. Previously, the reactivated fault zone structures and spatiotemporal response of seismicity to evolving injection have been poorly constrained due to sparse publicly available seismic monitoring. The application of a machine‐learning phase picker to 4 years of continuous seismic data from a local array enables the detection and location of ∼38,000 earthquakes. The events from 2016 to 2020 are ∼2.5–6 km below sea level and range from ML< −1 to 4.2. Most earthquakes occur within previously identified ∼N‐S zones of seismicity, however our new catalog illuminates that these zones are composed of many short faults with variable orientations. The two most active zones, the Vermejo Park and Tercio zones, are potentially linked by small intermediate faults. In total, we find ∼60 short (<3 km long) basement faults with strikes from WNW to NNE. Faulting mechanisms are predominantly normal but some variability, including reverse dip‐slip and oblique‐slip, is observed. The Trinidad fault zone, which previously hosted a Mw5.3 earthquake in 2011, is quiescent during 2016–2020, likely in response to both slow accumulation of tectonic strain after the 2011 sequence, and the significant decrease (80% reduction) in nearby wastewater injection from 2012 to 2016. Unlike some other regions, where induced seismicity was triggered in response to higher injection rates, the Raton Basin's frequency‐magnitude and spatiotemporal statistics are not distinguishable from tectonic seismicity. The similarity suggests that seismicity in the Raton Basin is predominantly releasing tectonic stress.
2001 年 8 月至 10 月对科罗拉多州特立尼达附近地震群的调查
DOI: --
发表时间: 2002
期刊:
影响因子: --
作者:
M. Meremonte;J. Lahr;A. Frankel;J. Dewey;A. Crone;D. Overturf;D. Carver;W. Bice.
通讯作者: W. Bice.
德克萨斯州二叠纪盆地诱发地震活动的扩散
DOI: --
发表时间: 2021
期刊: Journal of Geophysical Research: Solid Earth
影响因子: --
作者:
R. Skoumal;D. Trugman
通讯作者: D. Trugman
加拿大艾伯塔省 Duvernay East 页岩盆地和 Willesden Green 的地应力状态:可变的地应力状态影响断层稳定性
DOI: --
发表时间: 2020
期刊: Journal of Geophysical Research: Solid Earth
影响因子: --
作者:
Luyi W. Shen;D. Schmitt;Ruijia Wang;T. Hauck
通讯作者: T. Hauck
DOI: 10.1093/gji/ggy423
发表时间: 2019-01-01
影响因子: 2.8
作者:
Zhu, Weiqiang;Beroza, Gregory C.
通讯作者: Beroza, Gregory C.
新墨西哥州科尔法克斯县卡茨基尔东北四边形地质图
DOI: --
发表时间: 1965
期刊:
影响因子: --
作者:
C. L. Pillmore
通讯作者: C. L. Pillmore