Seizmograf

Seizmometri (grč. seismós - potres, gráphō - pisati, beležiti) su uređaji koji mjere pomicanje tla, uključujući seizmičke valove uzrokovane potresima, nuklearnim eksplozijama i drugim seizmičkim izvorima. Bilježenje seizmičkih valova omogućava seizmolozima da naprave prikaz unutrašnjosti Zemlje, odnosno lociraju i odrede efekte tih seizmičkih izvora.

Replika Zhang Hengovog seizmografa iz doba kineske dinastije Han

Osim izraza seizmometar se koristi i seizmograf, iako ponekad više za starije uređaje u kojima su bilježenje i mjerenje seizmičkih valova vršili različiti mehanizmi.

Seizmometri i seizmografi se razlikuju od seizmoskopa koji je uređaj koji jedino bilježi da je do došlo do seizmičkog vala, ne odajući podatke o njegovoj lokaciji i dimenzijama.

Eksterni linkovi uredi

Republički seizmološki zavod Srbije Arhivirano 2009-10-27 na Wayback Machine-u
The history of early seismometers Arhivirano 2003-04-15 na Wayback Machine-u
A Java code applet demonstrating the operation of a damped-mass seismometer
http://neic.usgs.gov/neis/seismology/keeping_track.html Arhivirano 2009-02-01 na Wayback Machine-u
Link to live Seismic Drum at Geonet's Mangatainoka River station in New Zealand Arhivirano 2005-09-01 na Wayback Machine-u
The Lehman amateur seismograph, from Scientific American Arhivirano 2009-02-04 na Wayback Machine-u- not designed for calibrated measurement.
Sean Morrisey's professional design of an amateur teleseismograph 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.
USGS evaluation of Streckheisen STS-2 Seismometer models Arhivirano 2005-09-30 na Wayback Machine-u- Streckheisen is a common make of research seismometers
Pacific Northwest Seismograph Network-PNSN is a seimograph network in the northwest USA
SeisMac Arhivirano 2010-03-06 na Wayback Machine-u is a free tool for recent Macintosh laptop computers that implements a real-time three-axis seismograph.
The Incorporated Research Institutions for Seismology (IRIS) is a principal U.S. seismological instrumentation and data facility, principally supported by the National Science Foundation and the U.S. Department of Energy.
Video of seismograph at Hawaiian Volcano Observatory - on Flickr - retrieved on 2009-06-15.