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项目编号1649771
Collaborative research: Investigating effects of geologic complexity on induced seismicity, using M0-M5.7 seismicity from Prague, Oklahoma
Heather Savage
主持机构Columbia University
项目开始年2017
2017-05-01
项目结束日期2019-04-30
资助机构US-NSF
项目类别Standard Grant
项目经费201759(USD)
国家美国
语种英语
英文摘要The recent surge in induced seismicity in the Midwestern United States, during which Oklahoma has catapulted past California in seismicity rate, has created controversy, captured the attention of the general public, and influenced policy. As a result, induced seismicity has become a focal point of earthquake science in the United States over the last few years; however, much remains to be learned about the mechanisms of induced seismicity. In this research the well-recorded 2011 Prague, OK earthquake sequence will be used to investigate deformation on a scale not commonly obtainable in seismicity studies (earthquake location with precision ~10 meters). Such well-located earthquakes allow for better understanding of how complex faults fail. Furthermore, laboratory experiments on the rocks from the Prague area will provide information on how strong and stable the faults are, and how pumping fluids into the faults might promote earthquakes.

The Prague sequence contains three earthquakes greater than Mw5 and their robust aftershock sequences, as well as the foreshock sequences for two large events. The precision with which the Prague earthquakes can be located allows the failure processes to be considered on a scale comparable to fault structures measured in studies of exhumed faults. In addition, complementary laboratory experiments on lithologies from the Prague area will allow study of the effects of fluid pressure on fault strength and stability. The ultimate goal is to use the Prague dataset to probe the influence of fluid pressure and fault zone complexity on earthquake nucleation, propagation, and arrest. Specifically this work will address the following questions: 1) Do the faults near Prague show precursory activity that could be used to forecast rupture? 2) How does complex fault geometry control rupture? and 3) How do fault strength, strength heterogeneity, and fault stability play a role in induced earthquakes?
来源学科分类Geosciences - Earth Sciences
文献类型项目
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/71018
专题环境与发展全球科技态势
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Heather Savage.Collaborative research: Investigating effects of geologic complexity on induced seismicity, using M0-M5.7 seismicity from Prague, Oklahoma.2017.
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