The intensity of Galactic cosmic rays (GCRs) is affected by solar wind structures such as coronal mass ejections (CMEs), their interplanetary counterparts (ICMEs), and stream interaction regions (SIRs), giving rise to temporal decreases in the cosmic ray intensity, which can be recorded with neutron monitor data, these variations observed at the Earth surface can be a valuable tool to analyze and predict space weather phenomena. However, some of these decrements cannot be linked to significant structures in the local interplanetary medium. In other words, we may have events not detected at L1 close enough to Earth to affect neutrons. They might be significant even though Wind or ACE does not detect them. In this work, we look for this type of decrements during the beginnings of solar cycle 24 using heliospheric imagers onboard STEREO, allowing us to observe the region between the Sun and Earth in a manner that was never followed by imaging cameras continuously, allowing us to determine enhancements in density observed by heliospheric imagers may explain previously unexplained cosmic ray decreases.