This landslide took place due to incessant heavy rainfall and poor terrain response to increase in pore pressure and resultant reduction in shear strength. 

 A report on recent landslides in Thodupuzha, Udumbanchola and Devikulam taluks, Idukki district, Kerala by C. Muraleedharan, Geologist (Sr) and M. P. Muraleedharan, Director, Opn TNPK, Unit Kerala, Thiruvananthapuram (2007)

Rajpuram Landslide
Vathikkudi
Failed area needs to be protected by afforestation. Local administration and revenue authorities may take precautionary measures by not granting building permit atleast in these highly vulnerable areas. Awareness programme may be arranged in the affected
Water percolated through thin soil cover and highly jointed bedrock due to incessant rainfall. This water got channelized and seeped through subhorizontal  joints. Later this water has created enormous pore water pressure and reduced shear strength of ov