This study examines analog seismograms that were generated when most seismic stations had their own clock for timing, making precise comparison of time between different stations difficult. Availability of accurate relative timing facilitates differential travel‐time analyses, such as seismic tomography and local earthquake relocations, to be performed using data originally recorded on paper or other physical media. These analyses allow for the investigation of longer‐term processes like the earthquake cycle or climate change. We take advantage of the continuous nature of seismic noise to determine the relative time correction between two stations by leveraging the symmetry of the noise correlation function. This procedure is applied to two Global Positioning System‐timed stations in the Hawaiian Volcano Observatory network demonstrating subsecond time accuracy. The technique is then applied to analog records from comparable stations between 7 and 10 August in 1988, and relative time corrections of up to about 6 s are obtained. These corrections are confirmed by the relative arrival times of teleseismic P waves of earthquake doublets.

中文翻译：

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使用单日环境噪声相关函数的历史模拟地震图的相对时间校正

这项研究检查了当大多数地震台站都有自己的时钟进行计时时所产生的模拟地震图，因此很难精确比较不同台站之间的时间。准确的相对定时的可用性有助于使用原始记录在纸或其他物理介质上的数据来执行差分行时分析，例如地震层析成像和局部地震重定位。这些分析可用于调查长期过程，例如地震周期或气候变化。我们利用地震噪声的连续性，通过利用噪声相关函数的对称性来确定两个站之间的相对时间校正。此过程适用于夏威夷火山天文台网络中两个全球定位系统定时的站点，这些站点显示了亚秒级的时间精度。然后将该技术应用于1988年8月7日至10日之间可比较台站的模拟记录，并获得了大约6 s的相对时间校正。这些校正通过两次地震的远震P波的相对到达时间得到证实。