Tremors were felt in Chennai, Bangalore, Thiruvananthapuram and several other cities across South India following the 8.7 magnitude earthquake in Indonesia.
Areas near Marina Beach Road in Chennai have been alerted in the wake of several coastal regions of Tamil Nadu, Andhra Pradesh and Andaman and Nicobar Islands being put on alert, police said.
There were no immediate reports of damage to property or loss of lives.
In December 2004, killer Tsunami waves devastated several coastal areas of Tamil Nadu and hit Marina Beach here, causing heavy casualties.
In Kerala, people in Thiruvananthapuram and Kochi experienced slight tremors. The country's IT capital Bangalore also experienced mild tremors, police said.
People rushed out of houses and high rise office buildings in panic in these cities.