Excitation of Hard Rock Aquifers in Southern Peninsular India Associated with the 2004 Sumatra Earthquake

Emergence of springs at surface or in shallow pits reported from discrete locations during the month of January 2005 in the southern Indian peninsular shield area had been an interesting post geo-hydrological phenomenon to investigate. Such freak incidences at places in the interior parts of a continental shield area were reported for the first time. Its connectivity with the 2004 mega thrust great (Mw 9.3) Sumatra earthquake and its multiple aftershocks are studied and analyzed. Resistivity 2D imaging and its hydrogeological modulations revealed perched aquifer conditions at shallow depth ( 50 m) groundwater support that the spring water is originated due to local effect by the 2004 mega thrust earthquake. The emergence of spring is attributed to ground movement and squeezing of pores in the saturated zone at shallow depth due the mega thrust Sumatra earthquake.