12 Sept 2022. TESTING A NEW INSTALLED VLF LF RADIO RECEIVER FOR SEISMIC PRECURSORS
1812 Sept 2022. TESTING A NEW INSTALLED VLF/LF RADIO RECEIVER FOR SEISMIC PRECURSORS’ MONITORING IN ROMANIA
By M. GHEORGHITA, E. SUCIU, A.S. MOLDOVAN, I.A. MOLDOVAN
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Since the Tomsk readout has stalled, I thought It might be a good idea to look at the hardware involved in atmospheric monitoring.
Here is a basic idea of the type of technology, and protocol used to acquire a signal. I'm looking to focus this video on the hardware aspects of this paper.
This is from 2009, yet, still relevant for our purposes. Remember, this is decades more advanced than the actual equipment that Professor Schumann himself used, to detect the atmospheric resonances which would later hold his name.
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ABSTRACT.
The paper presents the testing results of a new VLF/LF receiver for seismic precursors’ monitoring in Romania that is used, starting with March 2009, in the first phase of the Integrated System for the Forecast of Earthquakes in the European area.
The system aims to capitalize and integrate numerous research results related to the statistical provisioning of seismic events and is consisting of a network of measuring stations, interconnected and organized through a distributed information system, which can allow consistently the availability of data acquired continuously.
The acquired data refer to the amplitude of signals received in Romania and transmitted by high-power VLF and LF transmitters located in Europe.
The paper shows why anomalous changes of the received signal level occur as an effect of modification of the characteristics of the ionosphere above the epicenter of an earthquake which is in its preparatory stage, if this is located inside the 5th Fresnel zone of the propagation path.
Changes of the ionosphere’s altitude and composition, recorded as electromagnetic propagation anomalies, could be regarded as seismic precursors.
This is accomplished with the help of ground-based network of receivers and appropriately located transmitters.
The main contribution of the paper is that experimental data containing recordings of VLF/LF electromagnetic field monitoring in Romania are presented for the first time.
Moreover, these data are consistent with data recorded in other countries.
1. INTRODUCTION
The new VLF and LF radio receivers are currently used in the first phase of the Integrated System for the Forecast of the Seismic Events in the European area.
The system aims to capitalize and integrate numerous research results related to the statistical provisioning of seismic events.
The development of activities is divided into two phases:
first, implementing of an interconnected geographical network of data acquisition, for a comprehensive collection of useful information in the identification of an incipient seismic event;
secondly, definition of the data acquisition system, efficient real-time processing and classification techniques for categorization of seismic precursors in order to realize the early warning system for seismic events within defined confidence intervals:
the likely interest area of the incipient seismic phenomenon, the probable intensity of the seismic phenomenon and the period within which the event is expected.
5. DESCRIPTION OF THE RECEIVER
The VLF/LF band receiver is a radio receiver working in VLF and LF bands. The equipment is produced by the Italian company Elettronika S.r.l.[1].
It monitors 10 frequencies distributed in the 15~50 kHz / 150~300 kHz bands and, for each of them, saves the power level detected on a non-volatile memory at a customizable sample time interval.
The large amount of data collected by the VLF/LF radio receiver is organized in text files, one for each day.
The configuration of the equipment, the check of its status and the download of the collected data are possible by a standard, powerful and ubiquitous Ethernet interface.
Another available feature is the internal GSM modem that can be used to control the VLF/LF radio receiver from remote, by making data calls.
The interface and the possibilities during remote connection are the same as the local control by Ethernet.
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Source link [Received May 22, 2009]: ( https://www.academia.edu/28462822/Testing_a_New_Installed_VLF_LF_Radio_Receiver_for_Seismic_Precursors_Monitoring_in_Romania?email_work_card=view-paper )
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Wordpress: ( https://vertearbustosschumannresonanceharmonics.wordpress.com/2022/09/12/12-sept-2022-testing-a-new-installed-vlf-lf-radio-receiver-for-seismic-precursors-monitoring-in-romania/ )
schumann resonances public: ( https://schumannresonances.wixsite.com/website/post/12-sept-2022-testing-a-new-installed-vlf-lf-radio-receiver-for-seismic-precursors-monitoring )