2-D Electrical Resistivity Tomography (ERT) Data for Karonga, Northern Malawi Rift (2015, investigators Estella Atekwana, Daniel Lao-Davila, Folarin Kolawole)

This data set contains processed 2-D electrical resistivity tomography data acquired in July 2015 in the Karonga area of northern Malawi Rift. It was collected using a dipole–dipole array with an Iris Syscal Pro 10-channel resistivity meter. There were 72 electrodes with 10 m electrode spacing. The goal of the survey was to image the structure of the near-surface deformation along the trend of coseismic surface rupture of the St. Mary Fault associated with the 2009 Mw 6.0 Karonga, Malawi earthquake. The data consists of a NNW-SSE profile along the trend of the surface ruptures (Profile 1), and two roughly E-W profiles oriented perpendicular to and across the trend of the surface ruptures (Profiles 2 and 3). Profile 1 is 1070 m long, and Profiles 2 and 3 are 710 m long. The ERT data contains topography information. The data files are in the RES2DINV software ASCII format. More information on the format can be found in the RES2DINV manual at http://www.geotomosoft.com/downloads.php. They were generated as part of the projects called Integrated studies of early stages of continental extension: From incipient (Okavango) to young (Malawi) rifts, and IRES: Research Opportunities in Continental Rift Initiation for U.S. Undergraduate Geoscience Students in Malawi. Funding was provided by NSF awards EAR 1009988 and OISE 1358150. The 2015 Malawi data acquisition team included five 2015 International Research Experience for Students (IRES) participants: B. Clappe, C. Hull, T. Johnson, V. Nyalugwe, and S. Dawson.

本数据集包含于2015年7月在马拉维北部裂谷地区卡拉翁加地区采集的经过处理的二维电导率层析成像数据。该数据采用Iris Syscal Pro 10通道电导率计，通过偶极-偶极阵列进行收集。数据集包含72个电极，电极间距为10米。调查的目的是对与2009年马拉维6.0级Karonga地震相关的圣玛丽断层震后地表破裂趋势附近的近地表变形结构进行成像。数据包括沿地表破裂趋势的近南北西-东南向剖面（剖面1），以及两个大致东西向的剖面，这两个剖面垂直于并横跨地表破裂趋势（剖面2和3）。剖面1长度为1070米，剖面2和3长度均为710米。ERT数据包含地形信息。数据文件采用RES2DINV软件ASCII格式。有关格式的更多信息可以在RES2DINV手册中找到，手册地址为http://www.geotomosoft.com/downloads.php。这些数据作为名为“大陆扩张早期阶段综合研究：从初现（奥卡万戈）到年轻（马拉维）裂谷”和“IRES：马拉维大学地质科学学生大陆裂谷起始研究机会”的项目的一部分生成。项目资金由NSF奖项EAR 1009988和OISE 1358150提供。2015年马拉维数据采集团队包括五名2015年国际研究体验学生（IRES）参与者：B. Clappe、C. Hull、T. Johnson、V. Nyalugwe和S. Dawson。