Seismicity Monitoring in North-Central New Mexico by the Los Alamos Seismic Network
Seismicity Monitoring in North-Central New Mexico by the Los Alamos Seismic Network
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洛斯阿拉莫斯地震台网对新墨西哥州中北部的地震活动进行监测
DOI：
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发表时间：
2020
影响因子：
3.3
通讯作者：
P. Roberts
中科院分区：
文献类型：
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作者：
L. House;P. Roberts
洛斯阿拉莫斯地震台网（LASN）的第一批地震台站是在1973年安装的，作为监测核试验研究的一部分。到20世纪70年代末，网络的范围迅速扩大。到1980年代中期，由于失去资金，网络的空间覆盖范围急剧减少。但是，从那时起，有可能通过增加台站来扩大网络的覆盖范围，并逐步升级网络设备以符合当代仪器标准。这些改进将使持续记录网络数据成为可能，并启动与其他机构的实时数据交换，以改善整个新墨西哥州和邻近州的地震监测。在40多年的运行中，该台网为研究新墨西哥州中北部的地震活动性和构造提供了缓慢但稳定的地震记录量。目前的网络覆盖了从西部的卡尔德拉山谷到东部的大裂谷的区域。LASN已经给出了1973年至2013年间新墨西哥州中北部约900次地震的位置（最新的可用位置）。这些地震的震中有一个复杂的模式，其中一些可以归因于裂谷的变形，尽管大多数分布在裂谷以西的地区。在裂口谷及其附近缺乏地震活动性，这加强了早先基于少得多的地震的观察，这首先引起了人们对地震活动性缺乏的关注，并将其归因于地壳温度升高导致的韧性变形。
The first seismic stations of the Los Alamos Seismic Network (LASN) were installed in 1973, as a part of research on monitoring of nuclear testing. The extent of the network rapidly expanded by the late 1970s. By the middle 1980s, spatial coverage of the network was drastically reduced, due to a loss of funding. Since then, however, it has been possible to expand the coverage of the network with additional stations and to slowly upgrade network equipment to match contemporary instrument standards. These improvements will make it possible to keep recording the network’s data and to initiate real-time exchange of data with other institutions to improve earthquake monitoring throughout New Mexico and neighboring states. During more than 40 yr of operation, the network has provided a slow but steady increase in the volume of earthquake seismograms available to study seismicity and tectonics in north-central New Mexico. The current network covers an area from the Valles Caldera on the west, to within the Rio Grande rift on the east. LASN has yielded locations for about 900 earthquakes in north-central New Mexico between 1973 and 2013 (the most recent locations available). Epicenters of these have a complex pattern, with some that can be attributed to the deformation of the rift, though most are spread in areas west of the rift. A lack of seismicity in and near the Valles Caldera reinforces an earlier observation, based on far fewer earthquakes, which first called attention to this paucity of seismicity and attributed it to ductile deformation resulting from elevated crustal temperatures.