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Active Message Threads for November 2006
I'm sending this again to correct the spelling of "sine" as in "sine
wave." "Sign waves" are what people do on the curb to generate
business for a car wash! <http://www.mccullagh.org/db9/10/kids-car-wash.jpg>
A sine wave is a mathematical function.
<http://www.devx.com/assets/intel/9052.jpg>
Recently someone asked, "Is there a place that I can read about the
band pass filters and what they do? "
I'll take a stab at an answer and hope others will chime in as well.
Any seismic signal can…
[more]
No replies
Recently someone asked, "Is there a place that I can read about the
band pass filters and what they do? "
I'll take a stab at an answer and hope others will chime in as well.
Any seismic signal can be decomposed into an infinite set of sign
waves, each with a specific
amplitude and frequency. If all of the sign waves are added up, the
original seismogram will be
produced. Often the signal of interest has a low frequency and is
recorded with a low amplitude.
When viewed on the original s…
[more]
Replies
-
M8.3 Kuril Islands Earthquake - Larry Braile - 2006-11-18 14:12:05
John or Jan Lahr
2006-11-15 22:11:55
Professor Robert Butler of University of Portland and I have put
together a few pages on today's large earthquake. See:
http://jclahr.com/science/psn/as1/heli/KurilNov1506a.doc
If your AS-1 instrument didn't record this one, it's not working!
For more information see the USGS and IRIS web sites.
http://earthquake.usgs.gov/eqcenter/eqinthenews/2006/usvcam/
http://neic.usgs.gov/neis/bulletin/neic_vcam_t.html
http://www.iris.edu/news/special.htm
Cheers,
John
################################…
[more]
No replies
Jerry Cook (alias J.Bob) teaches at the Phoenix, Arizona, Country Day School,
sent this message recently which contains a lot of practical suggestions as to
how the classroom AS-1 seismic system can be used.
How are others integrating their seismic system into their teaching?
Cheers,
John Lahr
>Dear Team Seismic,
>First let me assure you that I will get my seismogram up and running
>again when I get back to America. I have been an exchange teacher in
>China for three months and the sch…
[more]
No replies
Jerry Cook
Dear Team Seismic,
First let me assure you that I will get my seismogram up and running again when I get back to America. I have been an exchange teacher in China for three months and the school seismogram broke down the day I left. I have tried to get IT at my school to get it running but to no avail. The link to the article did not work but I can guess at its contents. I think that without curriculum integration the seismogram would be of very limited value. It would be just like a pretty min…
[more]
No replies
ChrisAtUpw@aol.com
In a message dated 2006/11/04, JohnJan@lahr.org writes:
> Dear IRIS Teachers,
> Alan Kafak and others have published an article in the Seismological
> Research Letters on the use of classroom seismographs, which I think
> you will find interesting, informative, and possibly controversial.
> See Eduquakes @
> http://www.seismosoc.org/publications/SRL/SRL_77/srl_77-6_eq.html
>
> I'm also curious how you feel about the Seismographs in Schools
> program. How can IRIS encourage advancement bey…
[more]
No replies
Dear IRIS Teachers,
Alan Kafak and others have published an article in the Seismological
Research Letters on the use of classroom seismographs, which I think
you will find interesting, informative, and possibly controversial.
EduQuakes: Classroom Seismographs and the Challenge of Encouraging a
Culture of Scientific Inquiry in K-12 Schools by Alan Kafka, John E.
Ebel, Michael Barnett, Anastasia Macherides-Moulis, Leslie Campbell,
and Steve E. Gordon.
http://www.seismosoc.org/publications…
[more]
No replies
An article on Ruth Simon is in the November/December 2006 issue of
the Seismological Research Letters, a publication of the
Seismological Society of
America.
<http://www.seismosoc.org/publications/SRL/SRL_77/srl_77-6_uh.html>Unsung
Heroines: Ruth B. Simon Ruth was working at Lamont Observatory
during my first year in graduate school.
It reminded me of the manual that she wrote: Earthquake
interpretations : a manual for reading seismograms, which I haven't
thought about since my gra…
[more]
