8.6-magnitude quake rocks Indonesia's west coast Graphics shows an earthquake measuring 8.6 on the Richter scale jolted off the w...

8.6-magnitude quake rocks Indonesia's west coast

Graphics shows an earthquake measuring 8.6 on the Richter scale jolted off the west coast of Indonesia at 15:38 local time (8:38 GMT), April 11, 2012. (Xinhua/Cui Ying)

BEIJING, April 11 (Xinhua) -- An earthquake measuring 8.6 on the Richter scale jolted the west coast of Indonesia at 4:38 p.m. Wednesday (Beijing Time), according to the China Earthquake Networks Center (CENC).

The epicenter, with a depth of 20 km, was monitored at about 2.3 degrees north latitude and 93.1 degrees east longitude, the center said in a statement.

The quake was followed by another one measuring 8.2 on the Richter scale two hours later. The second quake jolted off the coast of northern Sumatra, Indonesia.

China's National Marine Environmental Forecasting Center said in a statement Wednesday evening that a tsunami wave, monitored in the Indian Ocean, is likely to hit the Indian and Sri Lankan coasts within two hours and the Arabian Peninsula, East Africa and Australia in five to six hours.

The wave has been measured at the height of about 31 cm by monitoring stations off Indonesia, the statement said.

The wave will probably not affect the Chinese coast and the center will keep a close eye on the development of tsunami, it said.

Several injured after 8.5 magnitude earthquake jolts Indonesia's Sumatra

　　The Photo taken on April 11, 2012 shows TV reports about patients in a hospital in Banda Aceh being transferred to safe place after an 8.5 magnitude earthquake took place in western Sumatra coast. Several people suffered bruises from falling materials on their heads when a major earthquake and aftershocks jolted northern Sumatra on Wednesday afternoon, a local TV reported. People living in Bengkulu, West Sumatra and Aceh were told to get ready for evacuation after the Meteorology, Climatology and Geophysics agency (BMKG) issued tsunami warning following the 8.5 magnitude earthquake. (Xinhua/Agung Kuncahya B.)

　　Photo taken on April 11, 2012 shows TV screen of the breaking news of the massive earthquake in Indonesia. India Wednesday issued a tsunami alert for Andaman and Nicobar Islands off the Bay of Bengal and in southern states of Tamil Nadu and Andhra Pradesh, after strong tremors were felt across the Indian eastern coast following a 8.9 magnitude quake in Indonesia. (Xinhua/Li Yigang)