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The Critical State of Stress Preceding the Prague m5.7 Earthquake

Description: 

Here we examine induced seismicity, a consequence of contemporary oil and gas extraction methods. We focus on understanding the role of large earthquakes in triggering subsequent seismic activities via transient dynamic stressing. Central to our investigation is Prague, Oklahoma, a region characterized by natural, induced, and dynamically triggered seismicity. We analyze approximately 1.5 years of data (2010 - 2012) gathered from EarthScope's USArray Transportable Array (TA), supported by an advanced local earthquake catalog. We investigate 254 teleseismic earthquakes (magnitude ≥ 6), and identify cases of increased seismic activity in Prague, Oklahoma, integrating a robust statistical approach. Notably, our findings indicate evidence of heightened triggered seismicity preceding the 2011 Mw 5.7 Prague earthquake, implying a state of critical stress prior to the event. This research highlights the complex interactions of static, induced, and transient stresses, offering vital insights for understanding and potentially mitigating induced seismicity.

Session: Induced Earthquakes: Source Characteristics, Mechanisms, Stress Field Modeling and Hazards [Poster Session]

Type: Poster

Date: 5/1/2024

Presentation Time: 08:00 AM (local time)

Presenting Author: Richard

Student Presenter: No

Invited Presentation: 

Authors