basskisser wrote:
John Gaquin wrote:
"Frogwatch" wrote in message

... felt a sorta wavy motion, it was two distinct waves
and maybe a few smaller ones a few secs later.

Classic earthquake. Could you distinguish at all as to whether they felt
predominantly verticle or horizontal? Were the later waves a noticebly
slower vibration than the first ones?

It depends on which fault, where on the fault, etc. There are many many
types of "classic earthquake". If the fault is a strikeslip fault (or
wrench fault) under extreme force, ie: it hasn't moved in a long time
because it's locked, then when it goes, it goes hard and fast. If not,
then the wave action occurs. Then you have several scenarios of
subduction faults (thrust faults) which act totally different.

I think the reason why I felt it and others didnt is that my house is
built up on piers about 3' off the ground so it can easily shake.
It clearly felt like two waves like going over a large speed bump
slowly. The waves were each about a second long and separated by less
than a second. Later ones were much shorter in duration and felt like
simple jolts and much less intensity. They came about 5 seconds after
the first and then a couple more maybe 10-20 seconds later. No objects
in the house shook or rattled.
A guy here at work says he was fishing and heard on VHF that there were
warnings to clear the shoreline in anticipation of a tiny Tsunami but
it didnt happen. It wouldnt take much of a Tsunami here to flood a lot
due to the very shallow south facing Apalachee Bay. Last years
Hurricane Dennis that did little damage anywhere passed considerably
south of here but its surge was magnified as it pushed up into the wide
shallow bay and caused considerable damage near here.