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▴ Daily seismicity rates of the Enola 2001 earthquake swarm. The three data points missing (days: May 8–10) are due to instrument malfunction. Two biggest peaks (days May 16 and July 1) closely coincide with the average 40-day period of the 1982 Enola sequence increased seismicity episodes.

▴ Daily seismicity rates of the Enola 2001 earthquake swarm. The three data... Available to Purchase

Published: 01 May 2010
Figure 3. ▴ Daily seismicity rates of the Enola 2001 earthquake swarm. The three data points missing (days: May 8–10) are due to instrument malfunction. Two biggest peaks (days May 16 and July 1) closely coincide with the average 40-day period of the 1982 Enola sequence increased seismicity
Journal Article

The Enola, Arkansas, Intraplate Swarm of 2001 Available to Purchase

Ivan Rabak, Charles Langston, Paul Bodin, Steve Horton, Mitch Withers, Christine Powell
Published: 01 May 2010
Seismological Research Letters (2010) 81 (3): 549–559.
DOI: https://doi.org/10.1785/gssrl.81.3.549
...Figure 3. ▴ Daily seismicity rates of the Enola 2001 earthquake swarm. The three data points missing (days: May 8–10) are due to instrument malfunction. Two biggest peaks (days May 16 and July 1) closely coincide with the average 40-day period of the 1982 Enola sequence increased seismicity...
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The 1982 enola, Arkansas, swarm and scaling of ground motion in the eastern United States Available to Purchase

Linda C. Haar, Jon B. Fletcher, Charles S. Mueller
Published: 01 December 1984
Bulletin of the Seismological Society of America (1984) 74 (6): 2463–2482.
DOI: https://doi.org/10.1785/BSSA0740062463
... - 2095 . Jackson K. C. (1979) . Earthquakes and earthquake history of Arkansas , Arkansas Geological Commission Information Circular 26 . Johnston A. (1982...
View PDF for article title, The <span class="search-highlight">1982</span> <span class="search-highlight">enola</span>, Arkansas, swarm and scaling of ground motion in the eastern United States
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Modeling Earthquake Rate Changes in Oklahoma and Arkansas: Possible Signatures of Induced Seismicity Available to Purchase

Andrea L. Llenos, Andrew J. Michael
Published: 01 October 2013
Bulletin of the Seismological Society of America (2013) 103 (5): 2850–2861.
DOI: https://doi.org/10.1785/0120130017
... ). Earthquake swarm activity began in January 1982 near the town of Enola ( Johnston, 1982 ). Over the next three years, over 30,000 M L <4.5 earthquakes were recorded, potentially triggered by magma intrusion or natural fluid migration ( Johnston, 1982 ; Chiu et al. , 1984 ). By 1987, seismicity had...
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View PDF for article title, Modeling <span class="search-highlight">Earthquake</span> Rate Changes in Oklahoma and Arkansas: Possible Signatures of Induced Seismicity
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Disposal of Hydrofracking Waste Fluid by Injection into Subsurface Aquifers Triggers Earthquake Swarm in Central Arkansas with Potential for Damaging Earthquake Available to Purchase

S. Horton
Published: 01 March 2012
Seismological Research Letters (2012) 83 (2): 250–260.
DOI: https://doi.org/10.1785/gssrl.83.2.250
... intense swarms of earthquakes near Enola in 1982 and 2001. Enola is ∼15 km southeast of the recent earthquakes. In Figure 6 the Enola swarm area is shown along with seismicity between January 1976 and April 2009. It is unclear whether the distribution of earthquakes is real or produced by uncertain...
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View PDF for article title, Disposal of Hydrofracking Waste Fluid by Injection into Subsurface Aquifers Triggers <span class="search-highlight">Earthquake</span> Swarm in Central Arkansas with Potential for Damaging <span class="search-highlight">Earthquake</span>
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Journal Article

Analysis of analog and digital records of the 1982 Arkansas earthquake swarm Available to Purchase

Jer-Ming Chiu, Arch C. Johnston, Ann G. Metzger, Linda Haar, Jon Fletcher
Published: 01 October 1984
Bulletin of the Seismological Society of America (1984) 74 (5): 1721–1742.
DOI: https://doi.org/10.1785/BSSA0740051721
.... (1982) . Arkansas' earthquake laboratory , EOS, Trans. Amer. Geophys. Union 63 , 1209 - 1210 . Johnston A. C. Metzger A. (1982) . TEIC special report #8, The Central Arkansas...
View PDF for article title, Analysis of analog and digital records of the <span class="search-highlight">1982</span> Arkansas <span class="search-highlight">earthquake</span> swarm
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Comments on “Some recent Lg phase displacement spectral densities and their implications with respect to prediction of ground motions in Eastern North America” by R. Street Available to Purchase

L. C. Haar, C. S. Mueller, J. B. Fletcher, D. M. Boore
Published: 01 February 1986
Bulletin of the Seismological Society of America (1986) 76 (1): 291–295.
DOI: https://doi.org/10.1785/BSSA0760010291
.... Mueller C. Spudich P. (1982) . Source parameters of the 1980 Mammoth Lakes, California, earthquake sequences , J. Geophys. Res. 87 , 4595 - 4607 . Fletcher J. B...
View PDF for article title, Comments on “Some recent Lg phase displacement spectral densities and their implications with respect to prediction of ground motions in Eastern North America” by R. Street
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On the relocation of earthquake clusters. A case history: The Arkansas earthquake swarm Available to Purchase

José Pujol, Jer-Ming Chiu, Arch Johnston, Byau-Heng Chin
Published: 01 December 1989
Bulletin of the Seismological Society of America (1989) 79 (6): 1846–1862.
DOI: https://doi.org/10.1785/BSSA0790061846
... will be given here. The first event was detected on January 1982 and was followed by more than 40,000 earthquakes over a period of 3 yr. The four largest events, with rnbLg magnitudes between 4.0 and 4.5, occurred during the first 2 months of the swarm. The epicenters were located very near the town of Enola...
View PDF for article title, On the relocation of <span class="search-highlight">earthquake</span> clusters. A case history: The Arkansas <span class="search-highlight">earthquake</span> swarm
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Significant Motions between GPS Sites in the New Madrid Region: Implications for Seismic Hazard Available to Purchase

Arthur Frankel, Robert Smalley, J. Paul
Published: 01 April 2012
Bulletin of the Seismological Society of America (2012) 102 (2): 479–489.
DOI: https://doi.org/10.1785/0120100219
...–west motion. This southward motion of CJTR relative to stations to the north may indicate localized north–south extension near CJTR. This southward motion is generally consistent with the direction of the tension ( T  ) axis of focal mechanisms from the nearby Enola, Arkansas, earthquake swarm...
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Characteristics of Induced/Triggered Earthquakes during the Startup Phase of the Guy–Greenbrier Earthquake Sequence in North–Central Arkansas Available to Purchase

Paul O. Ogwari, Stephen P. Horton, Scott Ausbrooks
Published: 06 April 2016
Seismological Research Letters (2016) 87 (3): 620–630.
DOI: https://doi.org/10.1785/0220150252
... 2011/03/22 2011/10/06 WHAR 35.2902 −92.2885 0.184 2010/05/17 Continuing Central Arkansas, especially the Arkoma basin, has a long history of scattered earthquake activity, including two intense swarms near Enola in 1982 and 2001 ( Chiu et al. , 1984 ; Rabak et al. , 2010 ). Prior...
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View PDF for article title, Characteristics of Induced&#x2F;Triggered <span class="search-highlight">Earthquakes</span> during the Startup Phase of the Guy–Greenbrier <span class="search-highlight">Earthquake</span> Sequence in North–Central Arkansas
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Journal Article

High-frequency spectral scaling of a main shock/ aftershock sequence near the Norwegian coast Available to Purchase

Eric P. Chael, Richard P. Kromer
Published: 01 April 1988
Bulletin of the Seismological Society of America (1988) 78 (2): 561–570.
DOI: https://doi.org/10.1785/BSSA0780020561
... C. Spudich P. (1982) . Source parameters of the 1980 Mammoth Lakes, California, earthquake sequence , J. Geophys. Res. 87 , 4595 - 4607 . Banda E...
View PDF for article title, High-frequency spectral scaling of a main shock/ aftershock sequence near the Norwegian coast
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Index to volume 74 Available to Purchase

Published: 01 December 1984
Bulletin of the Seismological Society of America (1984) 74 (6): 2727–2745.
DOI: https://doi.org/10.1785/BSSA0740062727
... Subevents of the 4 February 1965 Rat Islands Earthquake 893 Mueller, Charles S., Linda C. Haar, and Jon B. Fletcher--The 1982 Enola, Arkansas, Swarm 41 987 and Scaling of Ground Motion in the Eastern United States . . . . . . . . . . . . . . . . . . . . . . . . . . . 223 539 Munguia, Luis and James N. Brune...
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The dependence of peak horizontal acceleration on magnitude, distance, and site effects for small-magnitude earthquakes in California and Eastern North America Available to Purchase

Kenneth W. Campbell
Published: 01 October 1989
Bulletin of the Seismological Society of America (1989) 79 (5): 1311–1346.
DOI: https://doi.org/10.1785/BSSA0790051311
... and Linda Haar for providing digital data for the 1982 Enola, Arkansas, earthquakes. Dave Hampson developed the computer program that was used to simulate the SMA-1 accelerograms. I am grateful to Bernice Bender, Bill Joyner, Dave Boore, C. B. Crouse, Gall Atkinson, and Art McGarr for their insight...
View PDF for article title, The dependence of peak horizontal acceleration on magnitude, distance, and site effects for small-magnitude <span class="search-highlight">earthquakes</span> in California and Eastern North America
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Seismic source spectrum of microearthquakes Available to Purchase

Yoshihisa Iio
Published: 01 December 1992
Bulletin of the Seismological Society of America (1992) 82 (6): 2391–2409.
DOI: https://doi.org/10.1785/BSSA0820062391
.... Spudich P. (1982) . Source parameters of the 1980 Mammoth Lakes, California, earthquake sequence , J. Geophys. Res. 87 , 4595 - 4607 . Azimi S. A. Kalinin A. V...
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Moment-tensor solutions for three 1982 Arkansas swarm earthquakes by waveform modeling Available to Purchase

Chandan K. Saikia, Robert B. Herrmann
Published: 01 June 1986
Bulletin of the Seismological Society of America (1986) 76 (3): 709–723.
DOI: https://doi.org/10.1785/BSSA0760030709
.... Johnston, A. G. Metzger, L. Haar, and J. Fletcher (1984). Analysis of analog and digital records of the 1982 Arkansas earthquake swarm, Bull. Seism. Soc. Am. 74, 1721-1743. Haar, L., J. B. Fletcher, and C. S. Mueller (1984). The 1982 Enola, Arkansas, swarm and scaling of ground motion in the eastern United...
View PDF for article title, Moment-tensor solutions for three <span class="search-highlight">1982</span> Arkansas swarm <span class="search-highlight">earthquakes</span> by waveform modeling
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Source parameters from locally recorded aftershocks of the 9 January 1982 Miramichi, New Brunswick, earthquake Available to Purchase

Charles S. Mueller, Edward Cranswick
Published: 01 April 1985
Bulletin of the Seismological Society of America (1985) 75 (2): 337–360.
DOI: https://doi.org/10.1785/BSSA0750020337
... Earthquake Northumberland County, New Brunswick, New Brunswick Dept. of Nat. Res. Open-FileRept. 82-27, 37 pp. Haar, L. C., J. B. Fletcher, and C. S. Mueller (1984). The 1982 Enola, Arkansas swarm and scaling of ground motion in the eastern United States, Bull. Seism. Soc. Am. 74, 2463-2482. Hanks, T. C...
View PDF for article title, Source parameters from locally recorded aftershocks of the 9 January <span class="search-highlight">1982</span> Miramichi, New Brunswick, <span class="search-highlight">earthquake</span>
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Forecasting the Long‐Term Spatial Distribution of Earthquakes for the 2023 U.S. National Seismic Hazard Model Using Gridded Seismicity Available to Purchase

Andrea L. Llenos, Andrew J. Michael, Allison M. Shumway, Justin L. Rubinstein, Kirstie L. Haynie, Morgan P. Moschetti, Jason M. Altekruse, Kevin R. Milner
Published: 12 April 2024
Bulletin of the Seismological Society of America (2024) 114 (4): 2028–2053.
DOI: https://doi.org/10.1785/0120230220
... seismicity in the Delaware basin: Hydraulic fracturing or wastewater disposal? , Seismol. Res. Lett. 93 , no.  5 , 2640 – 2658 , doi: 10.1785/0220210320 . Haar L. Fletcher J. , and Mueller C. 1984 . The 1982 Enola, Arkansas, swarm and scaling of ground motion in the eastern United...
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View PDF for article title, Forecasting the Long‐Term Spatial Distribution of <span class="search-highlight">Earthquakes</span> for the 2023 U.S. National Seismic Hazard Model Using Gridded Seismicity
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Simultaneous inversion for Q and source parameters of microearthquakes accompanying hydraulic fracturing in granitic rock Available to Purchase

Michael Fehler, W. Scott Phillips
Published: 01 April 1991
Bulletin of the Seismological Society of America (1991) 81 (2): 553–575.
DOI: https://doi.org/10.1785/BSSA0810020553
... and local geology on high-frequency ground motions observed for aftershocks of the Northeastern Ohio earthquake of 31 January 1986, Bull. Seism. Soc. Am. 80, 889-912. Haar, L., J. Fletcher, and C. Mueller (1984). The 1982 Enola, Arkansas, swarm and scaling of ground motion in the Eastern United States, Bull...
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An empirical estimate of near-source ground motion for a major, m b = 6.8, earthquake in the eastern United States Available to Purchase

Kenneth W. Campbell
Published: 01 February 1986
Bulletin of the Seismological Society of America (1986) 76 (1): 1–17.
DOI: https://doi.org/10.1785/BSSA0760010001
.... (1982) . A preliminary methodology for the regional zonation of peak ground acceleration , Proc. of 3rd International Earthquake Microzonation Conference , Seattle, Washington , 1 , 365 - 376 . Campbell K. W. (1983...
View PDF for article title, An empirical estimate of near-source ground motion for a major, m b = 6.8, <span class="search-highlight">earthquake</span> in the eastern United States
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Source parameters and scaling relations for small earthquakes in the Matsushiro region, southwest Honshu, Japan Available to Purchase

P. S. Dysart, J. A. Snoke, I. S. Sacks
Published: 01 April 1988
Bulletin of the Seismological Society of America (1988) 78 (2): 571–589.
DOI: https://doi.org/10.1785/BSSA0780020571
.... Mueller C. S. (1984) . The 1982 Enola, Arkansas, swarm and scaling of ground motion in the eastern United States , Bull. Seism. Soc. Am. 74 , 2463 - 2482 . Hanks T. C. (1977) . Earthquake...
View PDF for article title, Source parameters and scaling relations for small <span class="search-highlight">earthquakes</span> in the Matsushiro region, southwest Honshu, Japan
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