Electromagnetic signals close in time to earthquakes

Dovbnya, B. V.; Зотов, О. Д.; Mostryukov, A. O.; Shchepetnov, R. V.

doi:10.1134/s1069351306080052

Cited by 9 publications

(7 citation statements)

References 8 publications

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“…The analysis of these observations has not revealed any quantitative relationship between the intensity of electromagnetic pulses and the parameters of earthquakes in a range of the magnitudes M between 3 and 8 and depths from 0 to 600 km (Dovbnya et al, 2006). Typical values of the amplitude of signals were a few tens of pT.…”

Section: Electromagnetic Signalsmentioning

confidence: 96%

“…Before going to this effect in detail, we summarize our observations of the impulse-type signals during seismic activity (the detailed description of the observations and signal time-andfrequency characteristics has been given in the previous paper by Dovbnya et al, 2006).…”

Section: Observationsmentioning

confidence: 98%

“…These variations have been compared with other geophysical phenomena and with earthquakes. As a result of these studies, impulse-type signals in the frequency range of 0-5 Hz have been found closely associated with earthquakes (within a few tens of seconds to a few minutes) (Dovbnya et al, 2006).…”

Section: Setting the Problemmentioning

confidence: 99%

“…As to the dependence on the distance from the earthquake epicenter, some preference for the relatively close earthquakes (2000-3000 km) was found. This analysis by Dovbnya et al (2006) is based on more than 200 events. Similar results have been reported earlier by Morgounov (1985).…”

Section: Electromagnetic Signalsmentioning

confidence: 99%

See 3 more Smart Citations

On the earthquake effects in the regime of Pc1

Dovbnya¹

2007

Journal of Atmospheric and Solar-Terrestrial Physics

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Section: Electromagnetic Signalsmentioning

confidence: 96%

Section: Observationsmentioning

confidence: 98%

Section: Setting the Problemmentioning

confidence: 99%

Section: Electromagnetic Signalsmentioning

confidence: 99%

See 2 more Smart Citations

On the earthquake effects in the regime of Pc1

Dovbnya¹

2007

Journal of Atmospheric and Solar-Terrestrial Physics

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“…В геофизической обсерватории «Борок» была предпринята попытка по данным непрерывных записей УНЧ вариаций электромагнитного поля Земли исследовать связь электромагнитных и сейсмотектонических процессов. В результате удалось обнаружить специфические УНЧ электромагнитные импульсы в диапазоне частот 0-5 Гц, наблюдаемые в выделенной временно́и окрестности землетрясений [Dovbnya et al, 2006]. Особое внимание привлекли те из них, которые наблюдались до сейсмического события.…”

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Short-term electromagnetic precursors of earthquakes

Довбня

Пашинин

Рахматулин

2019

Geodin. tektonofiz.

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In the study of the relationship between electromagnetic and seismotectonic processes, we analyzed the data of three observatories located at large distances, considering both latitudes and longitudes, and detected electromagnetic impulses in the frequency range from 0 to 5 Hz, which were recorded minutes before earthquakes. Detailed morphological and statistical analysis was carried out, and common and specific features were considered. Several cases are discussed to illustrate the occurrence of electromagnetic precursor signals before the recorded devastating earthquakes in Japan, China, Romania and other seismically active regions. A qualitative explanation is given for the study results.

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Daily-Seasonal Variation in the Number of Remotely Observed, Pulsed, ULF Electromagnetic Earthquakes and the Spatial Distribution of Their Generation Zones on the Earth’s Surface

Dovbnya

2022

Geomagn. Aeron.

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Based on data from long-term observations at two geophysical observatories, Borok and College, distantly spaced in latitude and longitude, the results of remote observation of pulsed electromagnetic, ultralow-frequency (ULF) signals detected from distant earthquakes are analyzed withinminutes of the seismic event. The daily and seasonal dependences of the frequency of occurrence of precursors in observatories and the nature of the spatial distribution of their generation zones on the Earth’s surface are studied. Two maxima are distinguished in the daily distribution of the recurrence frequency: in the evening and morning hours of local time. In the seasonal course, there is a maximum in the spring and an increase in the winter months. In the spatial distribution, there is an uneven location of sources around the globe: they are grouped into separate zones and cells that reflect separate regions on the map with manifestations of seismoelectromagnetic activity. Examples are given to illustrate the appearance of precursors. It is noted that the dynamic spectra of signals from earthquakes occurring in different regions of the Earth’s surface were similar. They were repeated at different magnitudes and focus depths and were observed in one time interval allocated relative to the moment of the earthquake. The results of the analysis indicated the universality of the processes of the generation of impulsive precursors preceding an earthquake, as well as the fundamental possibility of a short-term warning (of a few minutes) of an approaching earthquake.

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Electromagnetic signals close in time to earthquakes

Cited by 9 publications

References 8 publications

On the earthquake effects in the regime of Pc1

On the earthquake effects in the regime of Pc1

Short-term electromagnetic precursors of earthquakes

Daily-Seasonal Variation in the Number of Remotely Observed, Pulsed, ULF Electromagnetic Earthquakes and the Spatial Distribution of Their Generation Zones on the Earth’s Surface

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