Creating databases supported by VarSITI and its projects in 2017

REPORTS

Reports on this page:

Forbush-effects and interplanetary disturbances to study Earth-affecting solar transients

Database of Directivity Functions of Neutron Monitors

Assessment of Radiation Doses in the Earth's Atmosphere, Related to GLE events

Atmospheric and Whistler Events Detected in the Russian Far East

High Speed Streams and Geomagnetic Storms During Solar Cycle 24 (2009 - 2016)

Report on the results from the IZMIRAN Team on database:
Forbush-effects and interplanetary disturbances to study
Earth-affecting solar transients

The purpose and of database description:

Our database refers to the project ISEST/MiniMax24 (International Study of Earth-affecting Solar Transients) in the VarSITI. Inclusion of data for the long-lived periods (several solar cycles) will allow the estimation of variations and interrelation of many parameters of the interplanetary environment (a solar wind, cosmic rays, indexes of solar and geomagnetic activity) within Solar Activity cycles

The purpose of this project is the development of open network database for research of disturbances and transient phenomena in the interplanetary medium and in cosmic rays.

This database will allow us to study the coronal mass ejections (CMEs) and corotating interaction regions (CIRs) and their influence on the cosmic rays and parameters of the heliosphere.

During the period from January to March 2017 the IZMIRAN Team carried out the following work in the frame of International Study of Earth-Affecting Solar Transients (ISEST)/MiniMax24 (Creation of Database in the open Access):

1. The local database was verificated and prepared for a transition in the Internet.

2. Web pages (one for each year) were created on the base of the site of Space Weather Prediction Center in IZMIRAN in two versions – in Russian and English Look at. (see also fig. 1)

3. On these pages were uploaded all the events (>7000) over the history of cosmic ray observations and more than 100 fields for each event.

4. There was prepared and loaded on this site the description of the all database fields in Russian and English.

5. The interface is created which allows us to get data for separate events, for all events during the year or data for all period over 1957÷2015.

6. At present moment the first version of our database on the Forbush-effects in open access is ready for loading on NMDB (as reference) and VarSITI sites.

7. On the next step of our work the possibilities will be realized for a selection and sorting the events by different parameters of cosmic rays and of the Earth and space environment.

8. It is planned the permanent updating of this database.

Fig. 1. Screenshot of the page for Database on the Forbush effects and interplanetary disturbances in open access.

All the preliminary results of this work were reported on the workshop "10 Years Neutron Monitor Database – NMDB Workshop" (19÷23 March 2017, Athens, Greece) (Workshop web) where the IZMIRAN team took an active participation:

1. Belov A., Abunin A., Abunina M., Eroshenko E., Yanke V., Oleneva V. "Data Base on the Forbush effects and Interplanetary Disturbances in an open access" – oral.

2. Abunina M., Belov A., Abunin A., Eroshenko E., Oleneva V., Yanke V. "Vector anisotropy of the cosmic rays in the beginning of the Forbush decreases" – oral.

3. Eroshenko E., Belov A., Yanke V., Abunin A., Abunina M. "Contribution of IZMIRAN for using data from the NMDB" – oral.

4. Belov A., Kryakunova O., Abunin A., Abunina M., Gaidash S., Tsepakina I., Nikolaevsky N. "The behavior of high-energy magnetospheric electrons during solar cycles 22 and 23" – oral.

5. Papaioannou A., Anastasiadis A., Mavromichalaki H., Belov A., Eroshenko E., Abunin A., Abunina M. "Dependence of Groundlevel Enhancement (GLE) Events on their associated solar flare and CME characteristics" – oral.

All these reports were made on the basis and with using the IZMIRAN database on the Forbush effects and interplanetary disturbances. The possibilities of this database in the open access were discussed during the Workshop in Athens. A training course on the use this database in open access was performed after the Workshop among students and young specialists of the cosmic ray group from Athens University. Some new users appeared after discussion this database during the Workshop.

Link to this database at http://spaceweather.izmiran.ru/eng/dbs.html

web-address http://crd.yerphi.am/Directivity_Functions_Neutron_Monitors

We are pleased to inform you that we launched the Directivity Functions (DF) of Neutron Monitors. The database was created with the support of VarSITI. DF represents directional sensitivity of neutron monitor to primary cosmic ray protons. The concept of DF has developed in the paper: G. Karapetyan, “Directivity functions of neutron monitors”, J. Geophys. Res. Space, 2017, v.122, Iss.9.
Web page of the database is: http://crd.yerphi.am/Directivity_Functions_Neutron_Monitors

We hope that the database will provide useful information for researchers.

What Is Directivity Function?

STATIONS (37)

Alma-Ata Apatity Aragats Athens Baksan Barentsburg Beijing Calgary

Chacaltaya ESOI (Israel) Forth Smith Guadalajara Hermanus Inuvik Irkutsk Jungfraujoch

Kergulen Kiel Kingston LARC (Chile) Leadwile Lomnicky Stit Magadan Mexico

Mirny Moscow Nain Newark Norilsk Novosibirsk Oulu Rome

Sanae Terre Adelie Tibet Tixi Bay Thule Tsumeb Yakutsk

Database for
Assessment of Radiation Doses in the Earth's Atmosphere, Related to GLE events
University of Oulu, Finland

A new database for assessment of radiation doses in the Earth atmosphere, related to ground-level enhancement (GLE) events is created under VarSITI/SCOSTEP support and linked to the International GLE database    http://gle.oulu.fi/#/dose

The new database provides, for each GLE event, where possible, information on the estimated energy/rigidity spectra of solar energetic particles and the corresponding computed radiation doses at the cruise polar flight altitude of 35 kft (10668 m), see Figure. The results are shown for various reconstructions of solar energetic particles, available in literature, thus for some events there are several results covering a full range.

The computations were performed using a recent model (Mishev & Usoskin, JSWSC, 5, 3, 2015).

The database is useful for quick estimates of the radiation effects at cruise flight altitude caused by major GLE events during the last decades. The database will be kept updated when new events occur.

The new database will be presented to the community at the European Space Weather Week 2017 and European Cosmic Ray Symposium 2018. Several peer-review papers are in preparation .

Link to this database at http://gle.oulu.fi/#/dose

web-address http://www.ikir.ru/en/Departments/Paratunka/lre/Events/varsiti-2017.html
ftp://ftp.ikir.ru/pub/dan/varsiti/history/karymshino/algorithm1/

Continuous record of natural electromagnetic Very Low Frequency (VLF) radiation is carried out in IKIR FEB RAS by a multichannel VLF detector. The receiving site is located far from industrial noises. The measurement station provides the following: data acquisition; graphic representation of data; storage of data in the required form for further analysis. The measurement station consists of a receiving part and a data acquisition module. The receiving part includes antennas, amplifiers and filters. The data acquisition module includes a repeater unit, an analog-digital converter (ADC), a digital detector, and a digital filter. Two frame antennas oriented according to the cardinal points (north-south and east-west) are used in the complex. They receive the magnetic component of natural electromagnetic field in VLF range. The electric antenna is a 6-meter pin installed on a 3-meter foundation. The magnetic antenna consists of similar vertically arranged frames with the dimensions of 7.5×15 m. Their planes are oriented in the directions of north-south and east-west. 89 coils of a copper wire are wound around each frame. Pre-amplifiers are mounted at the bottom parts of the antennas.

The VarSITI have decided to support IKIR FEB RAS database construction entitled "Creation of a database for atmospheric and whistler events detected in the Russian Far East". The goal of IKIR FEB RAS project is the creation of a database for atmospheric and whistler events detected in the Russian Far East. The database was obtained by the recognition of atmospherics in WAV files, which were obtained by recording the VLF signals with electric and/or magnetic antennas. Description of the database structure you can find on this page:
http://www.ikir.ru/en/Departments/Paratunka/lre/Events/varsiti-2017.html .

1. The database of registered atmospherics at Karymshina Geophysical Observatory of IKIR FEB RAS (N52.49⁰, E158.07⁰) in Kamchatka is available at the following address:
ftp://ftp.ikir.ru/pub/dan/varsiti/history/karymshino/algorithm1/ . The database stores the number of recorded atmospherics per second.

2. An automatically updated database of registered atmospherics on mini-computer software and hardware complexes for distributed monitoring of low-frequency electromagnetic radiation is available at the following address: ftp://ftp.ikir.ru/pub/dan/varsiti/minipc/ .

3. An automatically updated database of registered whistlers on mini-computer software and hardware complexes for distributed monitoring of low-frequency electromagnetic radiation is available at the following address: ftp://ftp.ikir.ru/pub/dan/varsiti/whistlers/minipc/.

4. The history database of registered whistlers with magnetic East-West antenna is available at the following address. Whistlers were registered in Karymshina Geophysical Observatory of IKIR FEB RAS (N52.49⁰, E158.07⁰) in Kamchatka. The database also stores files both in text format (the extension of file is wsf1.txt) and in Java-serialized (the extension of file is wsf1).

Published papers with SCOSTEP/VarSITI grant support:

1. Mochalov V.A., Mochalova A.V.. Application of «Sensor signal analysis network» complex for distributed, time synchronized analysis of electromagnetic radiation // VIII International Conference “Solar-Terrestrial Relations and Physics of Earthquake Precursors”, 6 pages, DOI: 10.1051/e3sconf/20172002010 , 2017.

2. Mochalov V.A., Permyakov M. S., Cherneva N.V., Mochalova A.V. Functional scheme of the construction process of a multi-site system for lightning activity monitoring of tropical cyclones // Proc. SPIE, 23nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 4 pages, 2017.

3. Mochalov V.A., Firstov P.P., Cherneva N.V., Sannikov D.V., Akbashev R.R., Uvarov V.N., Shevtsov B.M., Druzhin G.I., Mochalova A.V. Development of a monitoring network for lightning stokes accompanying the eruptions of the Northern Group of Volcanoes on Kamchatka peninsula // Proc. SPIE, 23nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 4 pages, 2017.

The developed program in the process of working on SCOSTEP/VarSITI grant tasks:

1. V.A. Mochalov. Software platform for streaming analysis of time synchronized signals // Certificate of registration of computer software, N⁰ 2017619795 (2017).

Acknowledgments:
The work was supported by the SCOSTEP/VarSITI grant “Creation of a database for atmospheric and whistler events detected in the Russian Far East”.

Email address for contacts: vmochalov[at]ikir.ru

Best regards, Vladimir Mochalov.

web-address http://www.geodin.ro/varsiti/

We established a complex database (catalog) of the High Speed Streams (HSSs) produced by Coronal Holes (CHs) and their effects upon the terrestrial magnetosphere as geomagnetic storms during Solar Cycle (SC) 24 (2009-2016). The catalog is created under VarSITI/SCOSTEP support and it is available at http://www.geodin.ro/varsiti/.

The first part of the catalog lists basic parameters of the HSS. The second part contains all geomagnetic storms (GS) having Dst minimum value less or equal to –30 nT (from minor to strong GS) associated to each HSS. Generally, one single geomagnetic storm is induced by a HSS. However, if, during a complex HSS, two or even more geomagnetic storms are registered, their parameters will appear on successive rows in the catalog. The minimum negative values of the southern component of the heliospheric magnetic field (Bz, in nT) registered just before the minimum Dst values are also included. The catalog lists estimated values for the energy deposited in the magnetosphere from solar wind during the main phase of a storm. This database is useful for identifying GSs triggered by a HSS having a CH source during the on-going solar cycle (no.24). We intend to update this catalog each year by the end of SC24.

For any other information regarding this catalog, please contact Georgeta Maris Muntean