“…More recently, microtremor measurements have been proposed as a tool in the study and detection of hydrocarbon reservoirs. High spectral amplitude anomalies of microtremor signals in the 1-6 Hz frequency range, with a peak around 3 Hz, have been reported over a number of hydrocarbon reservoirs and named 'hydrocarbon microtremors' (HMs) (Singer et al 2002, Dangel et al 2003, Holzner et al, 2005a, 2005b, 2006a, 2006b, 2006c, 2007a, 2007b, Frehner et al 2006, 2007, Rached 2006, 2009, Lambert et al 2007, 2009b, Steiner et al 2007, 2008a, Graf et al 2007, Kaya et al 2007, Saenger et al 2007b, van Mastrigt and Al-Dulaijan 2008, Nguyen et al 2008, 2009, Goertz et al 2009, 2009b, 2009c. Table 1 shows a list of reservoirs where the existence of this type of anomaly has been reported.…”