[论文解读] An example of regional seismicity recovery on June 22, 2020, using waveform cross-correlation

Ivan Kitov|arXiv (Cornell University)|Feb 17, 2026

High-pressure geophysics and materials被引用 0

一句话总结

论文展示使用波形互相关来恢复2020年6月22日的区域地震活动，并在核试监测背景下重新评估IDC可能错过或低于探测阈值的事件。

ABSTRACT

June 22nd, 2020 was an important day for nuclear test monitoring. The US undersecretary, Thomas DiNanno, made an official claim that a secret nuclear test was conducted at the Lop Nor testing site on that day. However, the Provisional Technical Secretariat (PTS) of the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) reported that there were no seismic events consistent with a nuclear explosion on that date. This means that the event was either hidden under the threshold of the international monitoring system (IMS), or it was missed by the international data center (IDC). Alternatively, no event occurred. All scenarios are of interest to the scientific community. The routine processing of seismic data by the IDC is well documented in open sources. The threshold for detection is not uniform across the globe, especially in continental areas. Additionally, it is not low enough to detect weapon-sized explosions using the cavity decoupling method. There are methods to lower this threshold using waveform cross-correlation (WCC) techniques. On June 22th, 2020, the IDC ran a preliminary pipeline for processing seismic data from the IMS. This was done in a testing mode. Since 2020, the development of WCC methods has allowed for revisiting cases and obtaining high-quality reports on events that were not reported five years ago.

研究动机与目标

• 评估2020年6月22日的地震事件是否可能被IDC阈值检测到或错过。
• 展示波形互相关（WCC）如何降低地震监测的区域探测阈值。
• 重新审视IDC未报道的案例以评估自2020年以来WCC方法的潜力。
• 讨论基于WCC的恢复对IMS数据处理和事件报告的意义。

提出的方法

• 描述用于2020年数据的IDC初步处理流程在测试模式下的运行。
• 应用波形互相关（WCC）技术来探索区域地震活动的恢复。
• 论证自2020年以来开发的WCC方法能够对先前未报道的事件提供高质量报告。
• 将发现置于核试监测与探测阈值挑战的背景中进行讨论。

实验结果

研究问题

• RQ1 波形互相关是否能揭示2020年6月22日IDC未报道或低于其阈值的地震事件？
• RQ2 在IMS监测相关的大陆地区，WCC在多大程度上可以降低区域探测阈值？
• RQ3 自2020年以来WCC的发展如何改变在历史监测数据中重新审视并确认潜在事件的能力？

主要发现

• 自2020年以来开发的WCC方法允许重新审视案例，并对五年前未报道的事件获得高质量报告。
• WCC在区域层面降低探测阈值的潜力存在，提升大陆地区的灵敏度。
• 在2020年以测试模式运行的IDC处理流程凸显了利用改进技术重新评估历史事件的持续机会。