Annual, 11-year period and aperiodic variations of the induction vector by eight observatories of Intermagnet network
DOI:
https://doi.org/10.24028/gzh.0203-3100.v39i1.2017.94013Keywords:
electromagnetic functions of response, induction vectors, periodical variations of induction vectors, foreshocks of earthquakesAbstract
A large amount of geomagnetic data of Intermagnet network observatories for 1991—2014 years have been processed and time series of induction vector components for every month were obtained. This paper presents the results of processing of eight observatories, located in different parts of the globe. For these observatories graphs of monthly values of induction vector components for four intervals of periods from the range 5—60 minutes are shown. Periodic changes in vector components (from semiannual to 11-years) are detected, as well as trends. After 2007 some increase of annual variations is seen. The most intense variations are at high geomagnetic latitudes and in the equatorial zone; they arc minimal in the middle latitudes. The nature of variations is affected both by global and regional/local factors. Investigation of these periodic changes can give an unique information on the substance and the structural features of the Earth's interior. At Polish observatories long aperiodic variation is obtained after 2008, clarifying the nature of which requires further research.
References
Babak V. I., Klimkovich T. A., Rokityansky I. I., Tereshin A. V., 2013. Variations of induction vector in Japan. Geofizicheskiy zhurnal 35(1), 153—158 (in Russian).
Klymkovych T. A., 2009. Peculiarities of temporal variations of anomalous magnetic field and induction vectors in the Transcarpathian seismic- active trough: Diss. of the candidate of phys. and math. sci. Kiev, 195 p. (in Ukrainian).
Moroz Yu. F., Smirnov S. E., Moroz T. A., 2006. The results of monitoring of geomagnetic field variations in Kamchatka. Fizika Zemli (3), 49—56 (in Russian).
Orlyuk M., Marchenko A., Romenets A., 2016. Seismicity of the Earth and age-related changes of the main magnetic field. In: Geophysical technologies for prediction and monitoring of geological media, Lviv, September 20—23. P. 202—204 (in Ukrainian).
Rokityansky I. I., Babak V. I., Tereshin A. V., 2015a. Variations of geomagnetic response functions in Japan. Geofizicheskiy zhumal 37(4), 126—138 (in Russian).
Rokityansky I. I., Babak V. I., Tereshyn A. V., 20156. Influence of geomagnetic activity on induction vector calculation results. Geofizicheskiy zhurnal 37(6), 86—98 (in Russian).
Rokityansky I. I., Tregubenko V. I., Babak V. I., Tereshyn A. V., 2013. Variations of induction vector components and horizontal tensor before the Tohoku earthquake of March 11, 2011 according to Japanese geomagnetic observatories data. Geofizicheskiy zhurnal 35(3), 115—130 (in Russian).
Semenov V. Yu., Petrishchev M. S., 2013. Effect of variation of external and internal sources of magnetic field on the results of induction sounding. Geodynamika 2(15), 326—328 (in Russian).
Semenov V. Yu., Petrishchev M. S., 2016. Annual variations of the apparent resistivity of the Earth and their relationship with tectonic zones in Eurasia. In: Geophysical technologies for prediction and monitoring of geological media, Lviv, September 20—23. P. 259—260 (in Russian).
Brasse H., Cerv V., Ernst T., Hoffmann N., Jankowski J., Jozwiak W., Korja Т., Kreutzmann A., Neska A., Palshin N., Pedersen L. В., Schwarz G., Smimov M., Sokolova E., Varentsov I. M., 2006. Probing the electrical conductivity structure of the Trans-European Suture Zone. Eos Trans. AGU, 87(29), 281 — 287.
Ernst Т., Brasse H., Cerv V., Hoffmann N., Jankowski J., Jozwiak W., Kreutzmarui A., Neska A., Palshin N., Pedersen L. В., Smimov M., Sokolova E., Varentsov Iv. M., 2008. EM images of the deep structure of the Trans-European Suture Zone beneath Polish Pomerania. Geophys. Res. Lett. 35, LI5307. doi: 10.1029/2008GL034610.
Fujiwara S., 1996. Temporal changes of geomagnetic transfer functions using data obtained mainly by the Geographical Survey Institute. Bull. Geograph. Surv. Inst. 42, 1—25.
Jozwiak W., 2012. Large-scale crustal conductivity pattern in Central Europe and its correlation to deep tectonic structures. Pure Appl. Geophys. 169, 1737—1747.
Kharin E.P., 1982. Changes in transfer functions with time. Geophys. Surv. (4), 455—466.
Neska A., Reda J., Neska M., Sumaruk Yu., 2013. On the influence of DC railway noise on variation data from Belsk and Lviv geomagnetic observatories. Acta Geophysica 61(2), 385—403.
Petrishchev M. S., Semenov V. Yu., 2013. Secular variations of the Earth's apparent resistivity. Earth Planet. Sci. Lett. 361, 1—6.
Rokityansky I. I., Klimkovich T. A., Babak V. I., Isac A., 2012. Annual and diurnal variations of induction vectors in relation to geodynamic processes. Geomatics, Natural Hazard and Risk, 3(3), 239—249.
Rokityansky I. І., Babak V. I., Tereshin A. V., 2014, Induction vector at Kakioka observatory during hundred years. EMSEV, Konstancin Jeziorna, September 22—26. P. 136—141.
Shiraki M., 1980. Monitoring of the time change in transfer functions in the Central Japan conductivity anomaly. J. Geomag. Geoelectr. 32, 637—648.
Shiraki M., Yanagihara K., 1977. Transfer function at Kakioka (Part II). Reevaluation of Their Secular Changes. Memoirs of the Kakioka magnetic observatory 17, 19—25.
Sokolova E. Yu., Varentsov Iv. M., EMTESZ-Pomerania WG, 2005. RRMC technigue fights highly coherent EM noise in Pomerania. In: Protokoll uber das 21 Kolloquium "EM Tiefenforschung". Eds O. Ritter, H. Brasse. Dtsch. Geophys. Ges. Potsdam. Germany, P. 124—136.
Varentsov Iv. M., Sokolova E. Yu., Martanus E. R. and EMTESZ-Pomerania WG, 2005a. Array view of electromagnetic transfer functions in the EMTESZ-Pomerania Project. In: Study of geological structures containing well-conductive complexes in Poland. Publ. Inst. Geoph. Pol. Acad. Sci. C-95(386), 107—121.
Varentsov Iv.M., Sokolova E.Yu., EMTESZ-Pomerania WG, 20056. The magnetic control approach for the reliable estimation of transfer functions in the EMTESZ-Pomerania Project. In: Study of geological structures containing well-conductive complexes in Poland. Publ. Inst. Geoph, Pol. Acad. Sci. C-95(386), P. 67—80.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2020 Geofizicheskiy Zhurnal
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:
1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
