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RE: 7.0 Landers Aftershock

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Wouldn't this be a function of the location of the epicenter? (Or is that
the "focus"?)

I mean, if a quake recurs at the same location, wouldn't that indicate it
was related to the previous quake at the same location?

> -----Original Message-----
> From: Paul Feather [mailto:pfeather(--nospam--at)san.rr.com]
> Sent: Saturday, October 16, 1999 12:08 PM
> To: seaint(--nospam--at)seaint.org
> Subject: Re: 7.0 Landers Aftershock
>
>
> A question for the list.
>
> The Landers earthquake happened several years ago.  If I
> remember correctly
> the Magnitude was also around 7.0.  At what point does a new
> earthquake
> cease to be an "aftershock" ?
>
> Paul Feather
>
> ----- Original Message -----
> From: <Seaintonln(--nospam--at)aol.com>
> To: <seaint(--nospam--at)seaint.org>
> Sent: Saturday, October 16, 1999 3:51 AM
> Subject: 7.0 Landers Aftershock
>
>
> > The news is reporting a series of earthquakes begining with a 6.6
> aftershock
> > of the Landers quake begining around 2:46AM this morning. Almost
> immediately
> > after, the high desert and the Coachella valley (low
> desert) in the 760
> area
> > code, was hit with a 7.0 after shock. Within the next hour
> there was a
> number
> > of after shocks around between 2.4 and 4.5 in magnitude.
> >
> > The epicenter has been reported by Cal Tech as 32 miles
> north of Joshua
> Tree
> > and Yucca Valley. Joshua Tree area is not highly populated,
> however, there
> is
> > a concentration in the towns of Yucca Valley.
> >
> > The quake lasted a little over 30 seconds and was a strong
> rolling quake.
> > Those who are calling in from the area (Palm Springs, Palm
> Desert, La
> Quinta)
> > have reported no structural type damage - although it is
> still very early
> to
> > tell, but I would not expect much. There is no power
> outages reported -
> > although I have not checked the scanners.
> >
> > If there is damage in the town of Joshua Tree or Yucca Valley that
> requires
> > the help of local engineers to assess damage, I would
> suggest that anyone
> who
> > has contacts with the emergency response teams relay the
> message to the
> list
> > and provide a contact for us to call.
> >
> > I will keep the list updated as reports come in. This is
> not very friendly
> to
> > occur when some of us insomniac's just fall asleep:o)
> >
> > Dennis S. Wish PE
> >
>
>
>