4.2 Publication distribution on a yearly basis
Figure 2 shows the yearly distribution of articles from all the accessed databases from 2000 to 2021. The figure shows that the peak number of articles (7) was published in 2006. Four (4) articles followed this in 2007. In 2004, 2013 and 2018, two (2) articles each were published. In 2000, 2001, 2002, 2003 and 2019, only a single article each was published regarding geophysical studies in the Bosumtwi Impact Crater. No articles were published in 2005, 2008, 2009, 2010, 2011, 2012, 2014, 2015, 2016, 2017 and 2020. The cluster of articles from 2006 and 2007 is due to the multidisciplinary International Continental Drilling Program (ICDP), a project that took place in 2004. The project involved unravelling the 3D building blocks of the impact crater, delineating key lithological units, imaging fault patterns, and defining key alteration zones (Koeberl et al., 2005 ).