MIDDLE LATITUDE LF (40 KHZ) PHASE VARIATIONS ASSOCIATED WITH EARTHQUAKES FOR QUIET AND DISTURBED GEOMAGNETIC CONDITIONS

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dc.contributor.author Rozhnoi A.
dc.contributor.author Solovieva M.S.
dc.contributor.author Molchanov O.A.
dc.contributor.author Hayakawa M.
dc.date.accessioned 2022-11-03T10:21:07Z
dc.date.available 2022-11-03T10:21:07Z
dc.date.issued 2004
dc.identifier https://www.elibrary.ru/item.asp?id=13455611
dc.identifier.citation Physics and Chemistry of the Earth, Parts A/B/C, 2004, 29, 4-9, 589-598
dc.identifier.issn 1474-7065
dc.identifier.uri https://repository.geologyscience.ru/handle/123456789/39364
dc.description.abstract The phase (P) and amplitude (A) anomalies in subionospheric LF signal (40 kHz) along the path Japan–Kamchatka of 2300 km have been studied for the data observed by means of a digital OminiPAL receiver for 2 years. The empirical model of background P and A daily variations for quiet and disturbed geomagnetic conditions in the absence of seismic activity is developed. We pay special attention to the P and A features during large magnetic storms. A sensitivity threshold of LF signal to deforming influence of the geomagnetic and seismic factors is defined. Two cases of bay-like behavior of LF phase and amplitude in nighttime are described as a clear earthquake precursor of LF signal. We have found from the statistical study that LF signal effect is observed only for earthquakes with M⩾5.5 and we discuss the possible mechanisms of the effect.
dc.subject earthquakes
dc.title MIDDLE LATITUDE LF (40 KHZ) PHASE VARIATIONS ASSOCIATED WITH EARTHQUAKES FOR QUIET AND DISTURBED GEOMAGNETIC CONDITIONS
dc.type Статья


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