fbpx
Wikipedia

Harmonic tremor

January 01, 1970

A harmonic tremor is a sustained release of seismic and infrasonic energy typically associated with the underground movement of magma, the venting of volcanic gases from magma, or both. It is a long-duration release of seismic energy, with distinct spectral lines, that often precedes or accompanies a volcanic eruption. More generally, a volcanic tremor is a sustained signal that may or may not possess these harmonic spectral features. Being a long-duration continuous signal from a temporally extended source, a volcanic tremor contrasts distinctly with transient sources of seismic radiation, such as tremors that are typically associated with earthquakes and explosions.

Seismograph recording of harmonic tremor
Four major types of seismograms, or seismic signatures

Nonvolcanic, episodic tremor has now been described,[1] and is distinguished by the term episodic tremor and slip (ETS) which may occur in slow earthquakes.

The relation between long-period events and an imminent eruption was first observed by Bernard Chouet, a volcanologist who was working at the United States Geological Survey.[2][3][4]

See also edit

Notes edit

  1. ^ Obara, Kazushige (2002). "Nonvolcanic Deep Tremor Associated with Subduction in Southwest Japan". Science. 296 (5573): 1679–1681. Bibcode:2002Sci...296.1679O. doi:10.1126/science.1070378. PMID 12040191. S2CID 32354691.
  2. ^ Chouet, Bernard A. (1996). "Long-period volcano seismicity: its source and use in eruption forecasting". Nature. 380 (6572): 309–316. Bibcode:1996Natur.380..309C. doi:10.1038/380309a0. ISSN 0028-0836. S2CID 4341826.
  3. ^ Interview with Bernard Chouet regarding his research into long-period events and volcanic eruptions: http://www.esi-topics.com/volcanoes/interviews/BernardChouet.html 2009-02-01 at the Wayback Machine .
  4. ^ U.S. TV program on use of long-period events to predict volcanic eruptions: "Nova: Volcano's Deadly Warning": https://www.pbs.org/wgbh/nova/volcano/ . See also "Volcano Hell" episode of BBC TV series "Horizon" on same subject: http://www.bbc.co.uk/science/horizon/2001/volcanohell.shtml .

External links edit

  • Seismicity, low frequency events and tremor at the Katla subglacial volcano, Iceland
  • The harmonic tremors of a volcanic eruption 2012-03-16 at the Wayback Machine
 

This seismology article is a stub. You can help Wikipedia by expanding it.

 

This volcanology article is a stub. You can help Wikipedia by expanding it.

January 01, 1970
harmonic, tremor, harmonic, tremor, sustained, release, seismic, infrasonic, energy, typically, associated, with, underground, movement, magma, venting, volcanic, gases, from, magma, both, long, duration, release, seismic, energy, with, distinct, spectral, lin. A harmonic tremor is a sustained release of seismic and infrasonic energy typically associated with the underground movement of magma the venting of volcanic gases from magma or both It is a long duration release of seismic energy with distinct spectral lines that often precedes or accompanies a volcanic eruption More generally a volcanic tremor is a sustained signal that may or may not possess these harmonic spectral features Being a long duration continuous signal from a temporally extended source a volcanic tremor contrasts distinctly with transient sources of seismic radiation such as tremors that are typically associated with earthquakes and explosions Seismograph recording of harmonic tremor Four major types of seismograms or seismic signatures Nonvolcanic episodic tremor has now been described 1 and is distinguished by the term episodic tremor and slip ETS which may occur in slow earthquakes The relation between long period events and an imminent eruption was first observed by Bernard Chouet a volcanologist who was working at the United States Geological Survey 2 3 4 See also editVolcano tectonic earthquakeNotes edit Obara Kazushige 2002 Nonvolcanic Deep Tremor Associated with Subduction in Southwest Japan Science 296 5573 1679 1681 Bibcode 2002Sci 296 1679O doi 10 1126 science 1070378 PMID 12040191 S2CID 32354691 Chouet Bernard A 1996 Long period volcano seismicity its source and use in eruption forecasting Nature 380 6572 309 316 Bibcode 1996Natur 380 309C doi 10 1038 380309a0 ISSN 0028 0836 S2CID 4341826 Interview with Bernard Chouet regarding his research into long period events and volcanic eruptions http www esi topics com volcanoes interviews BernardChouet html Archived 2009 02 01 at the Wayback Machine U S TV program on use of long period events to predict volcanic eruptions Nova Volcano s Deadly Warning https www pbs org wgbh nova volcano See also Volcano Hell episode of BBC TV series Horizon on same subject http www bbc co uk science horizon 2001 volcanohell shtml External links editSeismicity low frequency events and tremor at the Katla subglacial volcano Iceland The harmonic tremors of a volcanic eruption Archived 2012 03 16 at the Wayback Machine nbsp This seismology article is a stub You can help Wikipedia by expanding it vte nbsp This volcanology article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Harmonic tremor amp oldid 1186550020, wikipedia, wiki, book, books, library,

article

, read, download, free, free download, mp3, video, mp4, 3gp, jpg, jpeg, gif, png, picture, music, song, movie, book, game, games.