Well according to the South China Morning Post (that's a 'newspaper' for the uninitated - one of those classic daily money making schemes - SCMP for short) we had an earthquake last night measuring 3.5 on the Richter scale at 7.53pm to be precise.
Not that I actually noticed it though. I vaguely remember a slight jolt but was out having dinner at the time and was otherwise occupied! :o) And I also had a cold so wasn't really that with it at the time.
So...all this to say that, after having searched through the archives of the mother of all reliable news (aka the BBC - take that with a pinch of salt) in vain the story is nowhere to be found, so I can't even prove it to you. Alas...I fear Hong Kong could disappear into the sea and the whole of the Western World would never know.
** here endeth the sarcasm for the day. exit stage left.
Update: Matt blogged about the quake too and found a news article!