Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/748
DC Field | Value | Language |
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dc.contributor.authorall | Molchanov, O. A.; Schmidt United Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia | en |
dc.contributor.authorall | Yu. Schekotov, A.; Schmidt United Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia | en |
dc.contributor.authorall | Fedorov, E.; Schmidt United Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia | en |
dc.contributor.authorall | Belyaev, G. G.; Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation (IZMIRAN), Russian Academy of Science, Troitsk (Moscow Region), Russia | en |
dc.contributor.authorall | Solovieva, M. S.; Schmidt United Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia | en |
dc.contributor.authorall | Hayakawa, M.; The University of Electro-Communications, Chofugaoka, Chofu, Tokyo, Japan | en |
dc.date.accessioned | 2006-02-20T09:27:36Z | en |
dc.date.available | 2006-02-20T09:27:36Z | en |
dc.date.issued | 2004 | en |
dc.identifier.uri | http://hdl.handle.net/2122/748 | en |
dc.description.abstract | We present the results of ULF magnetic field observation at Karimshino station (Kamchatka, Russia). Using a case study we discovered an effect of suppression of ULF intensity about 2-6 days before rather strong and isolated seismic shocks (magnitude M = 4.6-6.6). It is revealed for nighttime and the horizontal component of ULF field (G) in the frequency range 0.01-0.1 Hz. Then we prove the reliability of the effect by computed correlation between G (or 1/G) and especially calculated seismic indexes Ks for the rather long period of observation from June 2000 to November 2001. Our recent data confirm the validity of the effect. We show here a similar result during a period of frequent strong seismic activity in April-May 2002. It is highly probable that the effect observed is connected with the increase in plasma density perturbations inside the ionosphere, which are induced by preseismic water and gas release at the ground surface and following energy transportation into the ionosphere by atmospheric gravity waves. Two models are discussed and computed: the first is a decrease of penetration coefficient of Alfven waves from the magnetosphere due to a turbulent increase in effective Pedersen conductivity in the ionosphere, and the second is a change in wave number (k) distribution of source ionospheric turbulence. One of the mechanisms or both could be responsible for the observed 2-3 times suppression of ULF magnetic field noise at the ground. | en |
dc.format.extent | 1238363 bytes | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | English | en |
dc.publisher.name | INGV | en |
dc.relation.ispartof | Annals of Geophysics | en |
dc.relation.ispartofseries | 1/47 (2004) | en |
dc.subject | Ultra-Low Frequency emission | en |
dc.subject | seismicity | en |
dc.subject | Alfven waves | en |
dc.title | Preseismic ULF effectand possible interpretation | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.subject.INGV | 04. Solid Earth::04.02. Exploration geophysics::04.02.04. Magnetic and electrical methods | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | open | en |
dc.contributor.author | Molchanov, O. A. | en |
dc.contributor.author | Yu. Schekotov, A. | en |
dc.contributor.author | Fedorov, E. | en |
dc.contributor.author | Belyaev, G. G. | en |
dc.contributor.author | Solovieva, M. S. | en |
dc.contributor.author | Hayakawa, M. | en |
dc.contributor.department | Schmidt United Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia | en |
dc.contributor.department | Schmidt United Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia | en |
dc.contributor.department | Schmidt United Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia | en |
dc.contributor.department | Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation (IZMIRAN), Russian Academy of Science, Troitsk (Moscow Region), Russia | en |
dc.contributor.department | Schmidt United Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia | en |
dc.contributor.department | The University of Electro-Communications, Chofugaoka, Chofu, Tokyo, Japan | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Schmidt United Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia | - |
crisitem.author.dept | Schmidt United Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia | - |
crisitem.author.dept | Institute of Earth Physics, Moscow, Russia | - |
crisitem.author.dept | Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation (IZMIRAN), Russian Academy of Science, Troitsk (Moscow Region), Russia | - |
crisitem.author.dept | Schmidt United Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia | - |
crisitem.author.dept | Department of Electronic Engineering, The University of Electro-Communications, Chofu, Tokyo, Japan | - |
crisitem.classification.parent | 04. Solid Earth | - |
Appears in Collections: | Annals of Geophysics |
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13Molchanov.pdf | 1.21 MB | Adobe PDF | View/Open |
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