The Observatory on Monday said, according to its initial analysis, a 4.1 magnitude earthquake jolted Hong Kong at 2.29 am. It said the epicentre was about 92 kilometres east-northeast of the SAR, near the south-east coast of the mainland.
The Observatory said it had received over 8,000 locally-felt reports of minor shaking for a few seconds.
It said it had given an initial local intensity estimate of four on the Modified Mercalli Intensity Scale – that is to say hanging objects swinging; and windows, dishes, and doors rattling.