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Episodic aseismic earthquake precursors
Nature, 1988Shallow earthquakes are generally believed to be brittle fractures in a stressed medium with rupture velocity at a speed close to that for shear waves. We know, however, that the Earth allows failure over a wide range of timescales. Creep events occur on the San Andreas fault system, and for some earthquakes the high-speed rupture is accompanied by a ...
Alan T. Linde +4 more
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Bulletin of the Seismological Society of America, 1975
Abstract An analysis of existing earthquake precursor data leads to a conclusion that the precursors reported so far can be classified into three types, i.e., A1, A2 and B types. Most of type B precursors, observed in terms of anomalous tilts and strains or foreshocks, have no magnitude-dependent precursor time.
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Abstract An analysis of existing earthquake precursor data leads to a conclusion that the precursors reported so far can be classified into three types, i.e., A1, A2 and B types. Most of type B precursors, observed in terms of anomalous tilts and strains or foreshocks, have no magnitude-dependent precursor time.
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Microseismic impulses as earthquake precursors
Izvestiya, Physics of the Solid Earth, 2006Records of the IRIS broadband stations in Petropavlovsk-Kamchatski, Yuzhno-Sakhalinsk, Magadan, Yakutsk, Arti, and Obninsk obtained before the Kronotskii (Kamchatka Peninsula) M = 7.7 earthquake of December 5, 1997, and the Neftegorsk (Sakhalin Island) M = 7.0 earthquake of May 27, 1995, are investigated with the use of the Spectra Analyzer interactive
G. A. Sobolev, A. A. Lyubushin
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Classification of earthquake precursors
Tectonophysics, 1979Abstract In view of the fact that fairly many data on earthquake precursors have been reported in recent years, some statistics concerning precursor times are again presented on the basis of the previous and newly-added data. The previous conclusion that the precursors can be classified into three kinds is reconfirmed very positively.
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Earthquake precursors in Japan: Precursor time and detectability
Tectonophysics, 1987Abstract Earthquake precursor data amounting to 418 in number accumulated in Japan are analyzed. Most data are obtained under the nation-wide earthquake prediction programme. The precursor time ( T ) versus main shock magnitude ( M ) relationship is different for different groups of precursors. A linear relation such as: log T = a + bM where a
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A Search for Earthquake Precursors
Science, 1996Geochemical signals that precede an earthquake might offer the hope of early warning and evacuation. The existence of such precursors is extremely controversial, however, as early optimism has turned into skepticism. In their Perspective, Silver and Wakita discuss new work on precursor events that was presented at a conference in Tokyo.
Paul G. Silver, Hiroshi Wakita
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Radon as an earthquake precursor
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2004Radon concentrations in soil gas were continuously measured by the LR-115 nuclear track detectors during four years. Also seismic activities, as well as the barometric pressure, rainfall and air temperature were observed. The influence of the meteorological parameters to the temporal radon variations was investigated and the respective equation of the ...
Vuković, Branko +2 more
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Physics and Chemistry of the Earth, Part A: Solid Earth and Geodesy, 2000
P.F Biagi, S.P Kingsley, F Vallianatos
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P.F Biagi, S.P Kingsley, F Vallianatos
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Spatial selectivity of earthquake’s precursors
Physics and Chemistry of the Earth, Parts A/B/C, 2006Abstract Multiparameter monitoring of earthquake’s (EQ) precursors reveals their selective localization (selectivity), i.e. a precursor can be observable in relatively small selected sensitive area(s) and not observable over remaining vast region. Selectivity and long distance appearance of precursors are rather strange and difficult for explanation,
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On magnetic precursors of earthquakes
Izvestiya, Physics of the Solid Earth, 2013A simple classification is proposed for magnetic precursors of earthquakes. The highlatitude observations of the socalled Big Magnetic Pulses (BMP)—isolated highamplitude magnetic pulses that sporadically arise against the undisturbed magnetic background—are used for searching for a probable cor relation between BMPs and earthquakes.
O. D. Zotov +2 more
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