An earthquake of moderate intensity measuring 4.6 on the Richter scale rattled many parts of Western Maharashtra this evening, officials said.

The tremor, with its epicentre in neighbouring Satara district, occurred at 6.34 pm and lasted for 15 seconds, according to U V Siddhamal, Chief Executive Engineer of the Koyna dam which has an installed seismograph.

While there were no reports of damage to life and property, some houses in Patan in the district developed cracks due to the shock, they said.

Epicentre of the quake was believed to be near Varanavati, about 20 km from the Koyna dam which has a hydel power station supplying electricity to Maharashtra.

People ran out of their houses in Satara in darkness as electricity supply was off due to evening hour loadshedding.

The quake was felt in Satara, Sangli, Kolhapur, Mumbai, Pune and Ratnagiri, officials said.