3.0 Systematic Review Methodology
We employed the PRISMA technique (Liberati et al., 2009 ) for data collection, including identifying the data sources required for the analysis, screening and checking data eligibility. In this study, we used a mixture of keywords to classify studies that utilised geophysical methods to investigate the Bosumtwi Impact Crater. Using three databases (SCOPUS, Google Scholar and Dimensions), we searched for articles in English related to geophysical studies in the Bosumtwi Impact crater from 2000 to date. We assume that these databases represent a wide range of scientific literature (Gupta et al., 2018; Gusenbauer and Haddaway, 2020; Waddington et al., 2012 ). The specific keywords used were “Geophysical” and “Bosumtwi” OR “Bosumtwe” and “Impact Crater”. An additional list of words used in this study is “Seismic” and “Resistivity” and “Magnetic” and “Gravity” and “GPR” and “Remote Sensing” and “Electromagnetic”. Table 1 shows the breakdown of the number of items identified from the three databases. From this search a total of 278 articles; 28 from SCOPUS, 210 from Dimensions and 40 from Google Scholar were identified. After deleting duplicates, we were left with 117 publications (see Figure 1 ). The resultant studies found from the literature search were further manually screened by reading their titles and abstracts. Consequently, we exclude review articles, technical reports, books, conference papers, and theses. Figure 1shows a schematic workflow for the data screening process.