The earthquake had a magnitude of 7.6, according to the U.S. Geological Survey, and hit offshore 30 miles from Padang, a city of about 750, 000 on Sumatra's western coast.
With the advent of underwater vehicle technology in the offshore industry, major survey and inspection tasks are now possible at lower cost with faster execution time.
随着水下潜器在海岸工程中的应用，许多调查和检测工作都可以在更短的时间和更低的消费的情况下来完成。
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From 2001 to 2004, offshore Petroleum Engineering Survey of SINOPEC and DNV have performed a successful risk assessment for three platforms that located in Shengli offshore area.