Having my Sunday morn coffee this morn lamenting the rain cuz I wanted
to go sailing and felt a sorta wavy motion, it was two distinct waves
and maybe a few smaller ones a few secs later. I've never felt an
earthquake and we arent s'posed to have em here in Tallahassee, FL but
I knew this wasnt a passing truck. It was very slight but unmistakable
and I thought "Earthquake?, maybe I ought go on the net and check some
seismometers" but I didnt. Now I see that there was a Mag. 6 about 200
miles west of Bradenton out in the Gulf. That'd put it about 300 miles
due south of here.

Frogwatch wrote:
Having my Sunday morn coffee this morn lamenting the rain cuz I wanted
to go sailing and felt a sorta wavy motion, it was two distinct waves
and maybe a few smaller ones a few secs later. I've never felt an
earthquake and we arent s'posed to have em here in Tallahassee, FL but
I knew this wasnt a passing truck. It was very slight but unmistakable
and I thought "Earthquake?, maybe I ought go on the net and check some
seismometers" but I didnt. Now I see that there was a Mag. 6 about 200
miles west of Bradenton out in the Gulf. That'd put it about 300 miles
due south of here.

It's the added weight of all those transplanted Yankees. They've cracked
Florida's foundation.

john wrote:
Frogwatch wrote:
Having my Sunday morn coffee this morn lamenting the rain cuz I wanted
to go sailing and felt a sorta wavy motion, it was two distinct waves
and maybe a few smaller ones a few secs later. I've never felt an
earthquake and we arent s'posed to have em here in Tallahassee, FL but
I knew this wasnt a passing truck. It was very slight but unmistakable
and I thought "Earthquake?, maybe I ought go on the net and check some
seismometers" but I didnt. Now I see that there was a Mag. 6 about 200
miles west of Bradenton out in the Gulf. That'd put it about 300 miles
due south of here.

It's the added weight of all those transplanted Yankees. They've cracked
Florida's foundation.

Dang, I knew it wuz somehting like that.

"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?

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.

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.

"Frogwatch" wrote in message

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.

I like to hear first-person accounts rather than analysis from film or paper
record, which is what we did years ago. I suppose they feed it right into a
computer now.

Its interesting that the quake measured 6.0 on the Richter scale, but at
your location only what sounds like about a II on the Mercalli, which
quantifies local intensity. Off the cuff, I'd guess that indicates a
rather deep focus quake. The first two rapid jolts you felt were probably
the primary waves direct from the epicenter, while the ones 5 seconds later
were likely those same primary waves reflected or refracted off parts of the
earth's inner structure. The movement you felt at 10-20 seconds could have
been the longer-period surface waves. In large earthquakes, particularly
those near the surface, these are the waves that tend to wrench buildings
apart and open wide fissures in the ground. But in small, deep quakes, its
just interesting to observe. Thanks for the description.

John Gaquin wrote:
"Frogwatch" wrote in message

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.

I like to hear first-person accounts rather than analysis from film or paper
record, which is what we did years ago. I suppose they feed it right into a
computer now.

Its interesting that the quake measured 6.0 on the Richter scale, but at
your location only what sounds like about a II on the Mercalli, which
quantifies local intensity. Off the cuff, I'd guess that indicates a
rather deep focus quake. The first two rapid jolts you felt were probably
the primary waves direct from the epicenter, while the ones 5 seconds later
were likely those same primary waves reflected or refracted off parts of the
earth's inner structure. The movement you felt at 10-20 seconds could have
been the longer-period surface waves. In large earthquakes, particularly
those near the surface, these are the waves that tend to wrench buildings
apart and open wide fissures in the ground. But in small, deep quakes, its
just interesting to observe. Thanks for the description.

The 10-20 second wave cycles could also have been aftershock. But you
may also be correct in that the wave cycles may have been caused by the
Ms (surface wave). I'd agree that the first shake he felt was probably
the P-wave.

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

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.

I like to hear first-person accounts rather than analysis from film or paper
record, which is what we did years ago. I suppose they feed it right into a
computer now.

Its interesting that the quake measured 6.0 on the Richter scale, but at
your location only what sounds like about a II on the Mercalli, which
quantifies local intensity. Off the cuff, I'd guess that indicates a
rather deep focus quake. The first two rapid jolts you felt were probably
the primary waves direct from the epicenter, while the ones 5 seconds later
were likely those same primary waves reflected or refracted off parts of the
earth's inner structure. The movement you felt at 10-20 seconds could have
been the longer-period surface waves. In large earthquakes, particularly
those near the surface, these are the waves that tend to wrench buildings
apart and open wide fissures in the ground. But in small, deep quakes, its
just interesting to observe. Thanks for the description.

The 10-20 second wave cycles could also have been aftershock. But you
may also be correct in that the wave cycles may have been caused by the
Ms (surface wave). I'd agree that the first shake he felt was probably
the P-wave.

Cool. We have no experience with earthquakes here so it was a really
novel thing.

"Frogwatch" wrote in message
oups.com...
Having my Sunday morn coffee this morn lamenting the rain cuz I wanted
to go sailing and felt a sorta wavy motion, it was two distinct waves
and maybe a few smaller ones a few secs later. I've never felt an
earthquake and we arent s'posed to have em here in Tallahassee, FL but
I knew this wasnt a passing truck. It was very slight but unmistakable
and I thought "Earthquake?, maybe I ought go on the net and check some
seismometers" but I didnt. Now I see that there was a Mag. 6 about 200
miles west of Bradenton out in the Gulf. That'd put it about 300 miles
due south of here.


I was anchored and fishing from a boat when the earthquake occurred. Didn't
feel a thing.