Evaluation of teleseismic waveforms and detection thresholds from the OSN pilot experiment
Evaluation of teleseismic waveforms and detection thresholds from the OSN pilot experiment
复制标题
OSN 试点实验的远震波形和探测阈值评估
DOI：
10.1121/1.425544
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发表时间：
1999
影响因子：
2.4
通讯作者：
C. Wolfe
中科院分区：
文献类型：
--
作者：
F. Vernon;J. Orcutt;G. Laske;F. Spiess;J. Collins;K. Peal;R. Stephen;C. Wolfe
第一次海洋地震台网先导试验（OSNPE）于1998年1月至6月进行。实验地点位于夏威夷瓦胡岛西南约225公里处，其中三个宽带地震仪部署在彼此相距300米的范围内，(i)部署在海底240米以下的钻孔中；（ii）在海底；（iii）埋在海底下面的。每个海底宽带地震仪站还配备了Cox - Webb长周期差压计（DPG）。OSNPE与PELENET（临时部署5个岛屿宽带站）和SWELL（临时部署8个dpg）同时运行。观测到50多次远震地震。在OSNPE期间记录的宽带地震图在0.01-0.1 Hz的频带内是相干的。在更高的频率（0.1-3 Hz），钻孔、埋藏、海底和岛屿地点之间的变化要大得多。对波形的仔细检查显示，在0.1 Hz以上的频率上存在显著差异。
The first Ocean Seismic Network Pilot Experiment (OSNPE) took place from January to June of 1998. The site of the experiment was located about 225 km southwest of Oahu, Hawaii, where three broadband seismographs were deployed within 300 m of each other, (i) deployed in a borehole 240‐m beneath the seafloor; (ii) on the seafloor; (iii) buried just beneath the seafloor. Each of the seafloor broadband seismograph stations also carried a Cox‐Webb long‐period, differential pressure gauge (DPG). The OSNPE ran concurrently with PELENET, a temporary deployment of five island broadband stations and SWELL, a temporary deployment of eight DPGs. Over 50 teleseismic earthquakes were observed. The broadband seismograms recorded during the OSNPE are coherent in the frequency band 0.01–0.1 Hz. At higher frequencies (0.1–3 Hz), there is considerably more variation between the borehole, buried, seafloor, and island sites. Careful examination of the waveforms shows significant differences in the frequencies above 0.1 Hz bet...