Fluid regime in the source and preparation area of an earthquake

Kissin, I. G.

doi:10.1134/s1069351316040029

Cited by 2 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The most acceptable mechanism seems to be the change in electrical conductivity as a result of the degassing of the Earth and the emergence of fluid filtration flows (Kissin, 2011). The results obtained allow us to assume that changes in the induced field  i in natural conditions and on a real-time scale could be carried out: into the upper sedimentary cover (Kormiltsev and Ratushnyak, 1997;Kissin, 2016).…”

Section: Analysis and Discussion Of The Obtained Resultsmentioning

confidence: 92%

Local Variations of the Geomagnetic Field Components as Possible Precursors of the Paravan and Spitak Earthquakes

Grigorian

Баранов

2022

Preprint

View full text Add to dashboard Cite

We analyze variable geomagnetic field δΤ which characterizes the change in electrical conductivity in the Earth's crust for the Armenia from 1986 to 1993. Clear geomagnetic precursors of the Paravan (13.05.1986, М=5.4) and Spitak (07.12.1988, М=7.0) earthquakes are obtained. About half a year before the Spitak earthquake, the parameters of the ratios of bay-like variations (30–60 and 5–25 min) of the horizontal and vertical components of the geomagnetic field δΤ decreased by about 30%. An analysis of the data two months before the Paravan earthquake also shows a sharp drop in the values of this parameter by 20–25%. In the interval between two earthquakes, the ratios of bay-like variations lie in the range of ± 10% with an average value of 1. For the Sq variations of the δD, δH, and δZ components of the geomagnetic field δΤ, a sharp drop was observed about a month before the Paravan earthquake from 1.2 to 0.8. After the Paravan earthquake, all three components partially returned to their pre-earthquake parameters (~ 1.2) within a few months. Further, a monotonous decrease in all three components of the geomagnetic field was observed up to the Spitak earthquake from 1.2 to 0.54. After this earthquake, the bay-like and Sq variations returned to normal values between 1 and 1.2 within a few months. The difference in the behavior for the bay-like and Sq variations in the period between two earthquakes is possibly associated with the beginning of the preparation of the Spitak earthquake a few months after the Paravan earthquake.

show abstract

Section: Analysis and Discussion Of The Obtained Resultsmentioning

confidence: 92%