Tremor Freq
tl...@interserv.com
in the morning hours? I can only remember one major quake in the daytime
at 16:00z while all the other major ones happen at night or early morning.
Richard A. Smith
tl...@interserv.com wrote:
: Does anyone know a reason for why CA Earthquakes usually happen
Pence234
Long Beach Quake of 1933 also occurred in late afternoon. If we must have
quakes, I would really rather have them during the daylight when my
cardiac response isn't so dramatic! However, the casualty toll is
projected to be much smaller for any event if folks are home in bed when
in happens, so we can be grateful for the fact that the Northridge Quake
happened when it did! Keep a flashlight by the bed, just in case.
Tim Kelly
: Does anyone know a reason for why CA Earthquakes usually happen
: in the morning hours? I can only remember one major quake in the daytime
: at 16:00z while all the other major ones happen at night or early morning.
I replied personally to the last person who asked this question, but I
will reply on the thread to you. My hypothesis states that EM earthquakes
occur in calm weather, with 95% of all EQs > 3.5 being EM type
earthquakes. I don't have hard data, but I have observed that early
morning hours are generally calmer than other hours in the day, hence
seemingly higher incidence of EQ activity in the early morning hours. In
other words, its the calm weather and not the time of day. To those that
might respond, what about the Landers Quake, it falls in the 5%
Regards,
Tim
"May you never be caught resting on your laurels."
Tim Kelly, HRIS Programmer/Analyst OSU Campus, Ads B308A
Oregon State System Of Higher Education (OSSHE) P.O. Box 488
Internet Address: kel...@osshe.edu Corvallis, OR 97339-0488
Phone: (503) 737-4159 FAX: (503) 737-0850
Dan Hariton x5596
|> aaaaaaaaaaaaahhhhh! Here we go again!
|>
|> : Does anyone know a reason for why CA Earthquakes usually happen
|> : in the morning hours? I can only remember one major quake in the daytime
|> : at 16:00z while all the other major ones happen at night or early morning.
|>
|> : tl...@interserv.com
|>
|>
the 1989 Loma Prieta quake occured around 5:00pm
Red Bear
> Does anyone know a reason for why CA Earthquakes usually happen
> in the morning hours? I can only remember one major quake in the daytime
> at 16:00z while all the other major ones happen at night or early morning.
I recall reading a theory that there is extra gravitational stress
on the earth's surface at sunrise and sunset. Cant quote source though
SF quake was at sunset
Don Long UCLA(retired) AKA Red Bear
E-Mail: red...@cinenet.net Prodigy LREA50A ag...@lafn.org
"The true revolutionary is guided by a great feeling of love" Che Guevara
Kathleen Ostridge
: On 1 May 1995 tl...@interserv.com wrote:
: > Does anyone know a reason for why CA Earthquakes usually happen
: > in the morning hours? I can only remember one major quake in the daytime
: > at 16:00z while all the other major ones happen at night or early morning.
The 1992 Petrolia 7.1 that lasted for about 49 seconds was at about 11:05am.
It was Saturday...folks were out doing their weekend errands (My mom was
only upset that she couldn't finish her errands that day!) and I was sure
there was going to be an earthquake....
The birds had worked themselves into a riot of noise and frenzy that
built up for three days prior. I mean, really making a rukus. I ran into
a rat in the garden at about 1pm the day before - rats and mice are
nocturnal and leave their woodpiles, etc before EQ's...and...last but not
least...the morning of...there was NO wind.
It was dead calm, and unseasonably warm, and every single bird that had
worked itself into a frenzy in the 3 days prior had shut completely up.
It was hard not to notice, and, I wasn't disappointed.
The only thing that moved outside before the EQ was a butterfly, who
fluttered like the one living thing in a still life picture. It was surreal.
Before and after Northridge we had alot of still air. I started telling
people 36 hours before Northridge we were gonna have one based on my
senses relating to the enviroment/atmosphere...which included stillness.
Needless to say, I got phone calls "you were right".
Birdie
--
"A few more trips around the sun & my face will look like a fault map!"
- bir...@netcom.com
Alvin Remetch
is the typical atmospheric conditions that usually accompany Santa Ana
winds. A lot of people think that a fair share of earthquakes happen
while the Santa Ana's are blowing. I know geologist say that there is no
such thing as earthquake weather but trying telling some Californians
that.
Ian Kluft
"Earthquake weather" is whatever the weather was during the last quake. :-)
i.e. in August 1989 there were some thunderstorms during one day and a 5.2
quake during the night, which turned out to be a preshock of Loma Prieta,
and prompted a "72-hour severe earthquake warning" from USGS. That got
everyone's attention.
For months people who think there's a link between weather and quakes were
worried about thunderstorms. Then in October 1989, the 7.1 Loma Prieta quake
hit on a warm, sunny day and those same people thought sunny weather was the
culprit. See the pattern?
Watch for it after the next 5+ in your area. It happens every time.
--
Ian Kluft KD6EUI PP-ASEL
ikl...@thunder.sbay.org (home) ikl...@oes.amdahl.com (work) Santa Clara, CA
If I don't identify the aircraft when I'm flying, can I report a UFO sighting?