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The Source Physics Experiments Large N Array

机译：源物理实验大n阵列

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To improve the understanding of S-wave generation from an explosion, a temporary deployment of 996 geophones, including both one-component (Z) and three-component sensors (3C), was installed from 15 April to 23 May 2016 at the Nevada National Security Site (NNSS). Sensor spacing varied from 25 to 100 m and consisted of 500 Z and 496 3C 5-Hz geophones. Data were continuously recorded during the deployment at low gain (0 dB) from 15 April to 28 April and high gain (36 dB) from 29 April to 23 May. A buried (76.5 m depth) 5035 kg trinitrotoluene (TNT) equivalent chemical explosion (Source Physics Experiments [SPE]-5) was recorded on 26 April. It was situated in a weathered granite body surrounded by volcanic tuffs, Paleozoic carbonates, and alluvium. The array was deployed similar to 400-3000 m from the explosion. A set of large weight drop shots (13,000 kg source) at 53 locations both inside and outside the geophone array were also recorded, as were local, regional, and teleseismic earthquakes. Data recovery was good, with 95% of data recovered from the chemical explosion and up to 99% in the following weeks, including both the weight drop shots campaign and the continuous data. Important initial results from the deployment include estimates of the spatial correlation length of velocity heterogeneities and a higher resolution velocity model. Observations of the data and synthetics indicate that some far-field (elastic) S-wave energy is generated by scattering and conversion outside the near-field (inelastic) region. Interferometric processing was conducted on a Hadoop big-data cluster.
机译：为了提高对从爆炸产生的S波的理解，从2016年4月15日到2016年4月15日之前安装了996个地震检塞器（包括单组分（Z）和三分量传感器（3C）的临时部署。安全网站（NNSS）。传感器间距在25到100米之间变化，包括500 z和496 3C 5-Hz地震镜。在4月15日至4月15日至4月28日至4月28日至23日至23日至23日的高增益（0 dB）期间，在部署期间持续记录数据。埋藏（76.5米深度）5035千克三硝基甲苯（TNT）当量的化学爆炸（源物理实验[SPE] -5）于4月26日记录。它位于被火山凝灰岩，古生代碳酸盐和加容器包围的风化花岗岩身上。阵列部署类似于爆炸的400-3000米。还记录了一系列大量重量射击（13,000千克源）在地理声音阵列内外，也录制了地理位置和外部的地点，是地方，区域和情境地震。数据恢复很好，有95％的数据从化学爆炸中恢复，接下来的几周内高达99％，包括重量下降射击活动和连续数据。部署的重要初始结果包括速度异质性的空间相关长度和更高分辨率速度模型的估计。数据和合成的观察表明一些远场（弹性）S波能量通过近场（非弹性）区域外的散射和转换产生。在Hadoop大数据集群上进行干涉处理。

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  • 来源
    《Seismological research letters》 |2018年第5期|共11页
  • 作者

    Mellors Robert J.; Pitarka Arben; Matzel Eric; Magana-Zook Steven; Knapp Douglas; Walter William R.; Chen Ting; Snelson Catherine M.; Abbott Robert E.;

  • 作者单位

    Lawrence Livermore Natl Lab 7000 East Ave L-046 Livermore CA 94550 USA;

    Lawrence Livermore Natl Lab 7000 East Ave L-046 Livermore CA 94550 USA;

    Lawrence Livermore Natl Lab 7000 East Ave L-046 Livermore CA 94550 USA;

    Lawrence Livermore Natl Lab 7000 East Ave L-046 Livermore CA 94550 USA;

    Lawrence Livermore Natl Lab 7000 East Ave L-046 Livermore CA 94550 USA;

    Lawrence Livermore Natl Lab 7000 East Ave L-046 Livermore CA 94550 USA;

    Los Alamos Natl Lab POB 1663 MS F665 Los Alamos NM 87545 USA;

    Los Alamos Natl Lab POB 1663 MS F665 Los Alamos NM 87545 USA;

    Sandia Natl Labs Geophys Dept POB 5800 MS 0750 Albuquerque NM 87185 USA;

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  • 正文语种 eng
  • 中图分类 地震学;
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