Results 221 to 230 of about 18,474 (268)

On magnetic precursors of earthquakes

Izvestiya, Physics of the Solid Earth, 2013
A 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, A. V. Guglielmi, A. L. Sobisevich   +2 more
openaire   +1 more source

A Search for Earthquake Precursors

Science, 1996
Geochemical 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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On the migration of precursors of strong earthquakes

Terra Nova, 1992
ABSTRACTIt is found that perturbations presumedly associated with swarms, the B patterns and the BG pattern precursors of strong earthquakes in New Zealand, California and Apennines, propagate in the crust of the Earth with a velocity of the order of cm1.
BELLA F, BIAGI P. F, CAPUTO M, DELLA MONICA, Giuseppe, ERMINI A, SGRIGNA, Vittorio   +5 more
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Classification of earthquake precursors

Tectonophysics, 1979
Abstract 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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Reverse tracing of precursors and earthquake precursors in Taiwan

Acta Seismologica Sinica, 2008
In this paper, we investigate the precursors of large earthquakes in the eastern region of Taiwan by means of the reverse tracing of precursors. We discuss the parameters which are suitable for the seismic chains and intermediate-term patterns in this region and obtain the threshold of the patterns.
Li-ping Wang, Yong Li, Li Ma, Shu-mei Zhang   +3 more
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Earthquake Precursors

Physics and Chemistry of the Earth, Part A: Solid Earth and Geodesy, 2000
Leonid F. Khilyuk, George V. Chilingar, John O. Robertson, Bernard Endres   +3 more
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Earthquake precursors in Japan: precursor time and detectability

Deep Sea Research Part B. Oceanographic Literature Review, 1987
Abstract 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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Microseismic impulses as earthquake precursors

Izvestiya, Physics of the Solid Earth, 2006
Records 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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Episodic aseismic earthquake precursors

Nature, 1988
Shallow 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, Kiyoshi Suyehiro, Satoshi Miura, I. Selwyn Sacks, Akio Takagi   +4 more
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Biosystem behaviour as an earthquake precursor

Tectonophysics, 1978
Abstract An analysis of 157 existing items of data concerning abnormal animal behaviour prior to an earthquake brings out apparent precursors of two kinds: moderately short-range and extremely short-range precursors; these have precursor times of the order of days and of hours, respectively.
openaire   +1 more source