Detection of the Wenchuan aftershock sequence using waveform correlation with a composite regional network

Slinkard, Megan; Heck, Stephen; Schaff, David; Bonal, Nedra; Daily, David; Young, Christopher; Richards, Paul

doi:10.1785/0120150333

Title: Detection of the Wenchuan aftershock sequence using waveform correlation with a composite regional network

Abstract

Using template waveforms from aftershocks of the Wenchuan earthquake (12 May 2008, M_s 8.0) listed in a global bulletin and continuous data from eight regional stations, we detected more than 6000 additional events in the mainshock source region from 1 May to 12 August 2008. These new detections obey Omori’s law, extend the magnitude of completeness downward by 1.1 magnitude units, and lead to a more than fivefold increase in number of known aftershocks compared with the global bulletins published by the International Data Centre and the Inter national Seismological Centre. Moreover, we detected more M > 2 events than were listed by the Sichuan Seismograph Network. Several clusters of these detections were then relocated using the double-difference method, yielding locations that reduced travel-time residuals by a factor of 32 compared with the initial bulletin locations. Finally, our results suggest that using waveform correlation on a few regional stations can find aftershock events very effectively and locate them with precision.

Authors:

Slinkard, Megan ^[1]; Heck, Stephen ^[1]; Schaff, David ^[2]; Bonal, Nedra ^[1]; Daily, David ^[1]; Young, Christopher ^[1]; Richards, Paul ^[2]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Lamont-Doherty Earth Observatory, Palisades, NY (United States)

Publication Date:: Tue Jun 28 00:00:00 EDT 2016

Research Org.:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation

OSTI Identifier:: 1341398

Report Number(s):: SAND-2016-12359J
Journal ID: ISSN 0037-1106; 649730

Grant/Contract Number:: AC04-94AL85000

Resource Type:: Journal Article: Accepted Manuscript

Journal Name:: Bulletin of the Seismological Society of America

Additional Journal Information:: Journal Volume: 106; Journal Issue: 4; Journal ID: ISSN 0037-1106

Publisher:: Seismological Society of America

Country of Publication:: United States

Language:: English

Subject:: 58 GEOSCIENCES

Citation Formats


                    Slinkard, Megan, Heck, Stephen, Schaff, David, Bonal, Nedra, Daily, David, Young, Christopher, and Richards, Paul. Detection of the Wenchuan aftershock sequence using waveform correlation with a composite regional network.  United States: N. p., 2016. 
        Web.  doi:10.1785/0120150333.

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                    Slinkard, Megan, Heck, Stephen, Schaff, David, Bonal, Nedra, Daily, David, Young, Christopher, & Richards, Paul. Detection of the Wenchuan aftershock sequence using waveform correlation with a composite regional network.  United States.  https://doi.org/10.1785/0120150333

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                    Slinkard, Megan, Heck, Stephen, Schaff, David, Bonal, Nedra, Daily, David, Young, Christopher, and Richards, Paul. 2016.  
        "Detection of the Wenchuan aftershock sequence using waveform correlation with a composite regional network".  United States.  https://doi.org/10.1785/0120150333.  https://www.osti.gov/servlets/purl/1341398.

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@article{osti_1341398,

  title        = {Detection of the Wenchuan aftershock sequence using waveform correlation with a composite regional network},

  author       = {Slinkard, Megan and Heck, Stephen and Schaff, David and Bonal, Nedra and Daily, David and Young, Christopher and Richards, Paul},

  abstractNote = {Using template waveforms from aftershocks of the Wenchuan earthquake (12 May 2008, Ms 8.0) listed in a global bulletin and continuous data from eight regional stations, we detected more than 6000 additional events in the mainshock source region from 1 May to 12 August 2008. These new detections obey Omori’s law, extend the magnitude of completeness downward by 1.1 magnitude units, and lead to a more than fivefold increase in number of known aftershocks compared with the global bulletins published by the International Data Centre and the Inter national Seismological Centre. Moreover, we detected more M > 2 events than were listed by the Sichuan Seismograph Network. Several clusters of these detections were then relocated using the double-difference method, yielding locations that reduced travel-time residuals by a factor of 32 compared with the initial bulletin locations. Finally, our results suggest that using waveform correlation on a few regional stations can find aftershock events very effectively and locate them with precision.},

  doi          = {10.1785/0120150333},

  url          = {https://www.osti.gov/biblio/1341398},
  journal      = {Bulletin of the Seismological Society of America},

  issn         = {0037-1106},

  number       = 4,

  volume       = 106,

  place        = {United States},

  year         = {Tue Jun 28 00:00:00 EDT 2016},

  month        = {Tue Jun 28 00:00:00 EDT 2016}

}

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Works referencing / citing this record:

Evolution and Distribution of the Early Aftershocks Following the 2008 Mw 7.9 Wenchuan Earthquake in Sichuan, China
journal, September 2018

Yin, Xin Zhong; Chen, Jiu Hui; Peng, Zhigang
Journal of Geophysical Research: Solid Earth, Vol. 123, Issue 9
https://doi.org/10.1029/2018jb015575

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Title: Detection of the Wenchuan aftershock sequence using waveform correlation with a composite regional network

Abstract

Citation Formats

Evolution and Distribution of the Early Aftershocks Following the 2008 Mw 7.9 Wenchuan Earthquake in Sichuan, China journal, September 2018

Evolution and Distribution of the Early Aftershocks Following the 2008 Mw 7.9 Wenchuan Earthquake in Sichuan, China
journal, September 2018