IRIS EPO

For educators, college/university faculty and professionals interested in the instruction of seismological concepts in primary and secondary classrooms.

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Active Message Threads for November 2006

John or Jan Lahr
2006-11-19 16:39:19
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 c... [more]
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John or Jan Lahr
2006-11-18 06:25:49 - 2006-11-18 14:12:05
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... [more]
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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]
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John or Jan Lahr
2006-11-09 01:44:16
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 s... [more]
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Jerry Cook
2006-11-08 09:23:02
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 m... [more]
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ChrisAtUpw@aol.com
2006-11-08 09:20:55
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 b... [more]
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John or Jan Lahr
2006-11-04 06:08:08
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/publicatio... [more]
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John or Jan Lahr
2006-11-04 05:15:46
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 g... [more]
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