Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

RE: California Earthquake Problems

[Subject Prev][Subject Next][Thread Prev][Thread Next]
I think you missed my point.  Of course the purpose of the code is "to minimize the damages in case the EQ strikes"
    Correct me if I'm wrong, but I understood you pretended to relate the level of protection the code attempts to bring to the buildings (i.e. in a probabilistic approach) to a Richter magnitude number, which i'm pretty sure is no good for that matter.  And that's what I meant by saying that you can't tell the owner of the building his property is protected against a, say, 7.0 Richter magnitude EQ, because it's certainly not the same if the EQ strikes in China that if it does in Chile.
    On the other hand, I promise to check the link, but still I cannot imagine someone being able to "predict" an earthquake whit a reasonable anticipation.
--Mensaje original-----
De: Yank2002(--nospam--at) <Yank2002(--nospam--at)>
Para: seaint(--nospam--at) <seaint(--nospam--at)>
Fecha: domingo 17 de enero de 1999 4:39
Asunto: RE: California Earthquake Problems

Hi, Rodrigo:

You say:
>We can't asses the damage by relating to a Richter magnitude, we would have
>develop site & fault-specific indexes to be able to barely get close to what
the extent
>of the damage to a certain structure could be. 

The purpose of the seismic code is not to assess the damages caused by an
earthquake but to minimize the damages in case the EQ strikes, and before such
assessments are attempted to be made.

You also say:
>On the other hand, I'm not very sure about the scientists being able to
predict (within
>a reasonable anticipation of the event so as to permit the spread of panic)
the location
> and magnitude of an earthquake.
> Sounds like an  X-files episode to me :)
I do not watch X-files so I cannot comment on that subject.

Please take a look at site and
see that Loma Prieta earthquake was actually predicted/projected by Stanford
The key areas of major seismic activities along the San Andreas fault are now,
to a great degree, equally predictable/projectable. By creating similar graphs
(using the data from the USGS) you can project (not predict) where the next
San Andreas EQ event will probably occur also in Southern California. It will
take you some time to do it, but it can be done.

The location of the next Northern California's San Andreas fault EQ is quite
visible on the Stanford site.


******* ****** ******* ******** ******* ******* ******* ***
*   This email was sent to you via Structural Engineers
*   Association of Southern California (SEAOSC) server. To
*   subscribe (no fee) to the list, send email to
*   admin(--nospam--at) and in the body of the message type
*   "join seaint" (no quotes). To Unsubscribe, send email
*   to admin(--nospam--at) and in the body of the message
*   type "leave seaint" (no quotes). For questions, send
*   email to seaint-ad(--nospam--at) Remember, any email you
*   send to the list is public domain and may be re-posted
*   without your permission. Make sure you visit our web
*   site at:
******* ****** ****** ****** ******* ****** ****** ********