Editing Seismometer (section)

== External links ==
{{Commons category|Seismometers}}
*[https://web.archive.org/web/20060619124943/http://neic.usgs.gov/neis/seismology/history_seis.html The history of early seismometers]
* [http://psn.quake.net/lehman.txt The Lehman amateur seismograph, from Scientific American] {{Webarchive|url=https://web.archive.org/web/20090204130757/http://psn.quake.net/lehman.txt |date=2009-02-04 }}- not designed for calibrated measurement.
* [http://www.eas.slu.edu/People/STMorrissey/index.html Sean Morrisey's professional design of an amateur teleseismograph] [http://www.bryantlabs.net/VertSeis.html Also see Keith Payea's version] Both accessed 2010-9-29 Morrissey was a professional seismographic instrument engineer.  This superior design uses a zero-length spring to achieve a 60-second period, active feedback and a uniquely convenient variable reluctance differential transducer, with parts scavenged from a hardware store.  The frequency transform is carefully designed, unlike most amateur instruments.  Morrisey is deceased, but the site remains up as a public service.
* [http://www.suitable.com/tools/seismac.html SeisMac] is a free tool for recent Macintosh laptop computers that implements a real-time three-axis seismograph.
* [http://www.aip.org/history/pubs/collabs/phase2rep2.htm#appendixB The Development Of Very-Broad-Band Seismography: Quanterra And The Iris Collaboration] {{Webarchive|url=https://web.archive.org/web/20160810025233/https://www.aip.org/history/pubs/collabs/phase2rep2.htm#appendixB |date=2016-08-10 }} discusses the history of development of the primary technology in global earthquake research.
* [https://www.flickr.com/photos/waiferx/2658307394/in/set-72157606105014024/ Video of seismograph] at [[Hawaiian Volcano Observatory]] – on [[Flickr]] – retrieved on 2009-06-15.
* [http://seismoscope.allshookup.org/ Seismoscope] – Research References 2012
* [http://www.iris.edu/hq/files/publications/brochures_onepagers/doc/OnePager7.pdf Iris EDU] – How Does A Seismometer Work?
* [https://www.usgs.gov/faqs/seismometers-seismographs-seismograms-whats-difference-how-do-they-work? Seismometers, seismographs, seismograms – what's the difference? How do they work?] – USGS

{{Authority control}}

[[Category:1880 introductions]]
[[Category:Chinese inventions]]
[[Category:Measuring instruments]]
[[Category:Seismology instruments]]