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.