Collaborative Research: RAPID: Deployment of a Nodal Array to Capture Aftershocks of the 2023 Kahramanmaras Earthquake Sequences in Turkey

彭志刚和埃里克·桑德沃将在土耳其东南部安装100多台地震仪，以测量2023年2月6日致命地震后的余震。地震仪应该探测到所有震级大于1的余震，在10个月的部署中，可能会记录到大约10万次余震。安装这些地震仪并在大地震发生后不久进行测量是很重要的，因为每天余震的次数会随着时间的推移而减少。记录的地震数据将被上传到一个网站，并与其他科学家和感兴趣的公众免费共享。利用这些数据，彭、桑德沃和其他科学家可以估计该地区所有活动断层的几何形状，地壳的三维图像特性，并开发模型来帮助预测地震。这些数据还将用于绘制当地土壤加剧震动的地图，以便改进这些地区的建筑规范。三名美国研究生将前往土耳其，帮助彭、桑德沃和他们的土耳其合作者进行实地工作和数据分析。Zhigang Peng和Eric Sandvol提议在土耳其东南部部署地震仪，记录2023年2月6日7.8级和7.5级地震的余震。这些仪器将包括10台高动态范围的宽带地震仪，100台5赫兹SmartSolo三分量地震仪，以及6台短周期仪器，全部来自Earthscope的RAPID池。pi预计将记录到大约10万次余震，并且目录应该完整到M = 0.5到1。机器学习和模板匹配技术将应用于新的余震目录，以描绘东安纳托利亚和死海断层、塞浦路斯弧和这个构造复杂地区的板内断层的几何形状。这些数据也可以用来成像地壳速度结构，利用体波传播时间数据和表面波色散分析从大余震和环境噪声。来自节点仪器的数据也将用于量化频率范围内的站点放大。这个项目将加强图比塔克的美国和土耳其科学家之间的联系。来自pi机构的三名研究生将参加实地考察并获得宝贵的培训，以及与土耳其科学家和学生的合作经验。根据NSF RAPID数据政策，所有数据将被上传到Earthscope公司的数据管理中心（DMC）。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

Zhigang Peng and Eric Sandvol will install over 100 seismometers in southeastern Turkey to measure aftershocks following the deadly earthquakes of February 6, 2023. The seismometers should detect all aftershocks with magnitudes greater than 1, and over the ten-month deployment around 100,000 are likely to be recorded. It is important that these seismometers be installed and making measurements soon after the major quakes because the number of aftershocks per day decreases over time. The recorded earthquake data will be uploaded to a website and freely shared with other scientists and the interested public. Using these data, Peng, Sandvol, and other scientists can estimate the geometry of all active faults in the region, image properties of the crust in 3D, and develop models to help with forecasting earthquakes. The data will also be used to map out where local soils amplify shaking, so building codes can be improved in these areas. Three U.S. graduate students will go to Turkey to help Peng, Sandvol, and their Turkish collaborators with field work and data analysis.Zhigang Peng and Eric Sandvol propose to deploy seismometers in southeastern Turkey to record aftershocks from the February 6, 2023 M 7.8 and M 7.5 earthquakes. The instruments will include ten broadband seismometers with a high dynamic range, 100 5 Hz SmartSolo three-component seismometers, and six short-period instruments, all from from Earthscope’s RAPID pool. The PIs expect to record about 100,000 aftershocks and the catalogue should be complete down to M = 0.5 to 1. Machine learning and template matching techniques will be applied to the new aftershock catalogue to delineate the geometry of the East Anatolian and Dead Sea faults, the Cyprian Arc, and intraplate faults in this tectonically complex region. These data can also be used to image the crustal velocity structure, using body wave travel time data and surface wave dispersions analysis from large aftershocks and ambient noise. Data from nodal instruments will also be used to quantify site amplification for a range of frequencies. This project will strengthen ties between US and Turkish scientists at TUBITAK. Three graduate students from the PIs' institutions will participate in the fieldwork and gain valuable training, as well as collaboration experience with Turkish scientists and students. Following the NSF RAPID data policy, all of the data will be uploaded to Earthscope Inc.’s Data Management Center (DMC).This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.