Catalog of Start and End Times of Tremor-Like Episodes Near the Epicenter of the 2023 Mw 7.8 Türkiye Earthquake (12 August 2022 – 6 February 2023)

This dataset accompanies our study on tremor-like episodes that we discovered in the low-frequency seismic signals preceding the 2023 Mw 7.8 Kahramanmaraş earthquake in Türkiye. Between 12 August 2022 and 6 February 2023, eight months before the mainshock, we identified tremor-like episodes recorded at five seismic stations (NAR, KHMR, MGND, GAZ, and GZT) within a 46 km radius of the mainshock epicenter. Using seismic data from the NAR station (the closest to the mainshock) bandpass-filtered between 1.7 and 2.2 Hz, we identified the start and end times of 3741 tremor-like episodes, resulting in a catalog of 7482 markers.

This catalog forms the foundation of the statistical analyses presented in Zali et al. (2025). Additionally, we manually picked the first arrival times of 162 selected pulses recorded between 24 and 31 December 2022 from these episodes across the five stations. Our analysis suggests that these tremor-like episodes originate from an anthropogenic source, likely associated with activities of cement plants located on the Narlı Fault, which hosted the earthquake epicenter. This data publication provides the catalog of start and end times for 3741 tremor-like episodes at the NAR station and the first arrival times of 162 selected pulses recorded at the five stations.

本数据集配套于本团队针对土耳其2023年Mw 7.8级卡赫拉曼马拉什地震前低频地震信号中发现的类震颤事件（tremor-like episodes）所开展的研究。在主震发生前8个月的2022年8月12日至2023年2月6日期间，我们在震中周边46公里半径范围内的5个地震台站（NAR、KHMR、MGND、GAZ及GZT）记录到的信号中，识别出了类震颤事件。我们使用距主震最近的NAR台站的、经1.7~2.2 Hz带通滤波后的地震数据，识别出3741个类震颤事件的起止时间，最终得到包含7482个时间标记的事件目录。
该目录为本团队在Zali等人（2025）研究中呈现的统计分析提供了核心基础。此外，我们针对2022年12月24日至31日期间记录的上述类震颤事件，从5个台站中手动拾取了162个精选脉冲的初至时间。我们的分析表明，此类类震颤事件源自人为源，大概率与坐落于纳勒断裂（Narlı Fault）的水泥厂作业有关——该断裂正是此次地震震中所在的断裂带。本数据集发布了NAR台站处3741个类震颤事件的起止时间目录，以及5个台站记录的162个精选脉冲的初至时间。