Increasing seismicity in the U. S. midcontinent: Implications for earthquake hazard

Ellsworth, William L.; Llenos, A. L.; McGarr, A.; Michael, Andrew J.; Rubinstein, Justin L.; Mueller, Charles S.; Petersen, Mark D.; Calais, Éric

doi:10.1190/tle34060618.1

Cited by 94 publications

(56 citation statements)

References 19 publications

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“…It is now generally accepted that the uptick in seismicity is caused by large-scale wastewater injection into the Arbuckle Group (Ellsworth et al, 2015;Walsh and Zoback, 2015;Weingarten et al, 2015). Recent efforts to precisely relocate the activity -made possible through waveform data provided by private companies -show that the carpet of earthquakes is composed of discrete basement faults.…”

Section: Introductionmentioning

confidence: 99%

How faults wake up: The Guthrie-Langston, Oklahoma earthquakes

et al. 2018

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Large-scale wastewater disposal has led to a fast-paced reawakening of faults in the Oklahoma/Kansas region. High-resolution earthquake relocations show that the inventory of ancient basement faults in the study region differs from results of seismic surveys and geologic mapping focused on the sedimentary cover. We analyze the evolution of seismic activity in the Guthrie-Langston sequence in central Oklahoma in greater detail. Here, seismic activity has reactivated a network of at least 12 subvertical faults in an area less than 10 km across. Recorded activity began in late 2013, peaked about six months later, and includes two M 4 earthquakes. These earthquakes characteristically occur at about 4 km depth below the top of the basement and do not reach the sedimentary cover. The sequence shows a radial growth pattern despite being no closer than 10 km to significant wastewater disposal activity. Hydrologic modeling suggests that activity initiated with a time lag of several years relative to early injection activity. Once initiated, earthquake interactions contribute to the propagation of seismicity along the reactivated faults. As a result, the spatiotemporal evolution of the seismicity mimics a diffusive pattern that is typically thought to be associated with injection activity. Analysis of the fault slip potential shows that most faults are critically stressed in the contemporary stress field. Activity on some faults, for which we find low slip probability, suggests a significant contribution of geomechanical heterogeneities to the reawakening of these ancient basement faults.

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Section: Introductionmentioning

confidence: 99%

How faults wake up: The Guthrie-Langston, Oklahoma earthquakes

et al. 2018

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“…In addition, earthquake source parameters determined by the USGS NEIC are used to determine long-term earthquake hazard throughout the United States (Petersen et al, 2014). The USGS is working on several fronts to understand better the mechanisms that drive the increase in earthquake rate and to estimate the changing earthquake hazard in Oklahoma (Hough, 2014;Keranen et al, 2014;Sumy et al, 2014;Sun and Hartzell, 2014;Ellsworth et al, 2015;McNamara et al, 2015;Petersen et al, 2015;H. M. Benz, R. McMahon, D. Aster, D. McNamara, and D. Harris, personal communication, 2015).…”

Section: Recent Increase In Oklahoma Seismicitymentioning

confidence: 95%

“…Based on characteristics of the November 2011 Prague, Oklahoma, M W 5.6 earthquake sequence, we suggest that 12 separate recently reactivated fault systems pose the greatest potential hazard to the region ( Figure 1). Results from this study are an update of McNamara et al (2015) and can contribute to the assessment of earthquake hazard for the short-term "traffic-light" system implemented by the Oklahoma Corporation Commission (OCC) and the longterm USGS National Seismic Hazard Map (NSHM) (Petersen et al, 2014;Petersen et al, 2015;Ellsworth et al, 2015). (NEIC) single-event epicenters from 1974 through February 2015, colored by year and sized by magnitude.…”

Section: Introductionmentioning

confidence: 97%

“…It is well established that in 2009, the earthquake rate significantly increased throughout the central United States and that it is not an artifact of improved seismic-network monitoring capabilities (Ellsworth, 2013;Ellsworth et al, 2015). More than 50% of these earthquakes since 2009 have occurred in central Oklahoma, and in the past few years (2013)(2014)(2015), earthquake rates have increased even more, thus raising concerns for potential hazard to local communities and energy-industry infrastructure in central Oklahoma (McNamara et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Efforts to monitor and characterize the recent increasing seismicity in central Oklahoma

et al. 2015

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The sharp increase in seismicity over a broad region of central Oklahoma has raised concerns regarding the source of the activity and its potential hazard to local communities and energy-industry infrastructure. Efforts to monitor and characterize the earthquake sequences in central Oklahoma are reviewed. Since early 2010, numerous organizations have deployed temporary portable seismic stations in central Oklahoma to record the evolving seismicity. A multiple-event relocation method is applied to produce a catalog of central Oklahoma earthquakes from late 2009 into early 2015. Regional moment tensor (RMT) source parameters were determined for the largest and best-recorded earthquakes. Combining RMT results with relocated seismicity enabled determination of the length, depth, and style of faulting occurring on reactivated subsurface fault systems. It was found that the majority of earthquakes occur on near-vertical, optimally oriented (northeast-southwest and northwest-southeast) strike-slip faults in the shallow crystalline basement. In 2014, 17 earthquakes occurred with magnitudes of 4 or larger. It is suggested that these recently reactivated fault systems pose the greatest potential hazard to the region.

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“…5; 25, p. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. The issues related to induced seismicity are known and remain valid [7; 17, [28][29][30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

The acceleration response spectra for legnica-glogow

2017

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This paper presents average normalised acceleration response spectra calculated for mining induced seismic events which were recorded by twenty-one stations located in the area of Legnica-Glogow Copper District (LGCD). In this paper, 5.246 ground motion signals with peak ground acceleration (PGA) over 0.03 m/s 2 were analysed. The ground motions were caused by 1.886 mining events with M L greater than 2 (energy > 10 5 J), which occurred from 2004 to 2015. The design response spectra were estimated based on average normalised acceleration response spectra. Further analysis of results shows that the shape and amplitude of response spectra are strongly dependent on the event magnitude, the epicentral distance and the location of the stations. The obtained response spectra could be used for computing seismic forces which have impact on buildings response to ground motions caused by mining events in LGCD.Keywords: Response spectra, induced seismicity, local amplification Streszczenie W pracy wyznaczono średnie znormalizowane przyspieszeniowe spektra odpowiedzi na podstawie zapisów drgań wstrząsów górniczych, zarejestrowanych przez 21 stanowisk akcelerometycznych znajdujących się, na terenie Legnicko Głogowskiego Okręgu Miedziowego (LGOM). Do analizy wykorzystano 5246 rejestracje drgań gruntu o wartościach szczytowych powyżej 0.03 m/s 2 , wywołane 1886 wstrząsami górniczymi, o ML powyżej 2 (energia od 10 5 J), które miały miejsce od 2004 do 2015 roku. Na podstawie wyznaczonych znormalizowanych przyspieszeniowych spektrów odpowiedzi wyznaczono wzorcowe spektrum odpowiedzi dla tego rejonu. Pokazano także, że kształt i amplituda spektrów odpowiedzi zależy od wielkości zjawiska, odległości epicentralnej oraz od miejsca. Otrzymane wzorcowe spektrum odpowiedzi może być wykorzystywane do obliczania sił sejsmicznych oddziałujących na budowle w wyniku drgań podłoża wywołanych wstrząsami górniczymi w tym rejonie.Słowa kluczowe: Spektra odpowiedzi, sejsmiczność indukowana, lokalna amplifikacja 100

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Increasing seismicity in the U. S. midcontinent: Implications for earthquake hazard

Cited by 94 publications

References 19 publications

How faults wake up: The Guthrie-Langston, Oklahoma earthquakes

How faults wake up: The Guthrie-Langston, Oklahoma earthquakes

Efforts to monitor and characterize the recent increasing seismicity in central Oklahoma

The acceleration response spectra for legnica-glogow

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