Study of electromagnetic emissions associated with seismic activity in Kamchatka region

Abstract. A review of data processing of electromagnetic emission observation collected at the Complex Geophysical Observatory Karimshino (Kamchatka peninsula) during the first 5 months (July–November, 2000) of its operation is given. The main goal of this study addresses the detection of the phenomena associated with Kamchatka seismic activity. The following observations have been conducted at CGO: variations of ULF/ELF magnetic field, geoelectric potentials (telluric currents), and VLF signals from navigation radio transmitters. The methods of data processing of these observations are discussed. The examples of the first experimental results are presented.

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Search for anomalies in pulse flows of acoustic and electromagnetic emissions

E3S Web of Conferences ◽

10.1051/e3sconf/202019603006 ◽

2020 ◽

Vol 196 ◽

pp. 03006

Author(s):

Yury Senkevich

Keyword(s):

Electromagnetic Emission ◽

Structural Features ◽

Seismic Events ◽

Important Research ◽

Near Surface ◽

Kamchatka Region ◽

Research Task ◽

Electromagnetic Emissions ◽

Pulse Streams ◽

Timely Warning

Timely warning of disasters caused by earthquakes ensures life safety. Therefore, the search for markers of pre-seismic events preceding earthquakes remains an important research task. The article presents experimental methods for assessing seismic activity in the Kamchatka region based on the results of processing and analysis of geoacoustic and electromagnetic emission signals. The research is aimed at detecting anomalies in quantitative and qualitative indicators that characterize the pulse streams of acoustic emission of near-surface rocks and electromagnetic emission in the surface layer of the atmosphere. Signal processing and analysis are carried out using special algorithms that take into account the structural features of the variety of pulse shapes and their distribution over time.

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Wide-band ULF/ELF magnetic field measurement in Seikoshi, Izu Japan and some results from preliminary data analysis in relation with seismic activity

Journal of Atmospheric Electricity ◽

10.1541/jae.20.111 ◽

2000 ◽

Vol 20 (2) ◽

pp. 111-121

Author(s):

Yasuhide Hobara ◽

H. Yamaguchi ◽

T. Watanabe ◽

Y. Akinaga ◽

H.C. Koons ◽

...

Keyword(s):

Magnetic Field ◽

Data Analysis ◽

Preliminary Data ◽

Field Measurement ◽

Seismic Activity ◽

Wide Band ◽

Magnetic Field Measurement ◽

Elf Magnetic Field

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From high temporal resolution to synthetically enhanced radiometric resolution: insights from Night Thermal Gradient results

The European Physical Journal Special Topics ◽

10.1140/epjst/e2020-000247-x ◽

2021 ◽

Vol 230 (1) ◽

pp. 111-132 ◽

Cited By ~ 1

Author(s):

L. Piroddi

Keyword(s):

Data Processing ◽

Temporal Resolution ◽

Seismic Activity ◽

Thermal Gradient ◽

Central Italy ◽

Low Frequency ◽

Thermal Infrared ◽

High Temporal Resolution ◽

Electromagnetic Emissions ◽

Frequency Components

Abstract Electromagnetic emissions in thermal infrared bands are an important research topic on pre-earthquake studies. Satellite thermal data have been investigated by many independent research groups looking for their anomalous behaviour before main earthquake's occurrences. Among them, geosynchronous satellite data are reported as less prone to artefacts during data processing. In this work, the Night Thermal Gradient (NTG) algorithm is presented, which has been specifically proposed for geostationary thermal infrared data processing. NTG method relies on the exploitation of high temporal resolution data to find coherent low frequency components of a hypothetical precursory signal of seismic activity. In this paper, the method is presented by giving details about the applied procedures, steps, theoretical assumptions and results obtained during the studies of L'Aquila 2009 earthquake and the seismic activity of Central Italy and Sardinia.

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A Survey of Electromagnetic Influence on UAVs from an EHV Power Converter Stations and Possible Countermeasures

Electronics ◽

10.3390/electronics10060701 ◽

2021 ◽

Vol 10 (6) ◽

pp. 701

Author(s):

Yanchu Li ◽

Qingqing Ding ◽

Keyue Li ◽

Stanimir Valtchev ◽

Shufang Li ◽

...

Keyword(s):

Electromagnetic Interference ◽

Wide Spectrum ◽

Electromagnetic Emission ◽

Power Converter ◽

Electromagnetic Environment ◽

Communication Circuits ◽

Electromagnetic Emissions ◽

Surrounding Space ◽

Extra High Voltage ◽

The Impact

It is inevitable that high-intensity, wide-spectrum electromagnetic emissions are generated by the power electronic equipment of the Extra High Voltage (EHV) power converter station. The surveillance flight of Unmanned Aerial Vehicles (UAVs) is thus, situated in a complex electromagnetic environment. The ubiquitous electromagnetic interference demands higher electromagnetic protection requirements from the UAV construction and operation. This article is related to the UAVs patrol inspections of the power line in the vicinity of the EHV converter station. The article analyzes the electromagnetic interference characteristics of the converter station equipment in the surrounding space and the impact of the electromagnetic emission on the communication circuits of the UAV. The anti-electromagnetic interference countermeasures strive to eliminate or reduce the threats of electromagnetic emissions on the UAV’s hardware and its communication network.

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