Processed depth-migrated seismic reflection data across the Aleutian arc from Langseth ALEUT cruise MGL1110 (2011)

Three 2-D line segments from ALEUT cruise MGL1110 have been processed by the USGS to the point of migrated depth and used for figures in the von Heune et al., 2020 G-Cubed publication. The processing was done using ProMAX seismic data processing software on Linux/Redhat hardware. Processing steps and navigation details about these processed lines are given in the accompanying PDF file called "Data_Description_Processing_Flow_Navigation_Notes". These processed seismic files are in SEG-Y image format and navigation is the same as that in the P190 processed navigation files. However, these processed SEG-Y data files are subsets of the original lines and do not have the navigation coordinates stored in their trace headers. The processed lines can be located along the original track lines by using the table in the PDF document. The original seismic data was collected in 2011 with the LDEO Multi-Channel Seismic system during Langseth cruise MGL1110 as part of the ALEUT (Alaska Langseth Experiment to Understand the megaThrust) project. Chief Scientist on the cruise was Donna Shillington. Refer to Cruise MGL1110 for complete acquisition details.

美国地质调查局（USGS）已将ALEUT航次MGL1110的三段二维线段处理至偏移深度阶段，并用于von Heune等人2020年发表在G-Cubed的论文插图中。处理工作是在Linux/Redhat硬件上通过ProMAX地震数据处理软件完成的。这些处理线段的处理步骤和导航细节详见随附的PDF文件《Data_Description_Processing_Flow_Navigation_Notes》。这些处理后的地震文件采用SEG-Y图像格式，其导航信息与P190处理导航文件中的信息一致。但需注意，这些处理后的SEG-Y数据文件是原始线段的子集，其道头中未存储导航坐标。可通过PDF文档中的表格在原始航迹线上定位这些处理线段。原始地震数据是2011年在Langseth航次MGL1110期间，通过LDEO多道地震系统采集的，属于ALEUT（阿拉斯加朗塞斯实验：理解巨型逆冲断层，Alaska Langseth Experiment to Understand the megaThrust）项目的一部分。该航次的首席科学家为Donna Shillington。完整的采集细节请参考MGL1110航次资料。