Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/3516| DC Field | Value | Language |
|---|---|---|
| dc.contributor.authorall | Singh, C.; Department of Electronics and Communication Engineering, Faculty of Engineering and Technology, R.B.S. College, Bichpuri, Agra, India | en |
| dc.contributor.authorall | Singh, O. P.; Department of Physics, Faculty of Engineering and Technology, R.B.S. College, Bichpuri, Agra, India | en |
| dc.date.accessioned | 2007-12-20T13:48:50Z | en |
| dc.date.available | 2007-12-20T13:48:50Z | en |
| dc.date.issued | 2007-02 | en |
| dc.identifier.uri | http://hdl.handle.net/2122/3516 | en |
| dc.description.abstract | The variation in nighttime ionospheric E- and F-region critical frequencies (foEs and foF2) is examined for the months of August 1988, September 1993 and May 1997 in which major earthquakes (6<M<6.6) occurred in Indian seismic zones of Bihar-Nepal border, Latur in West India, and Jabalpur in Central India. The ionospheric data are obtained from Ahmedabad (latitude 23.01°N, longitude 72.36°E). The percent deviations of foF2 and foEs from their monthly median are determined for pre-midnight (18:00-00:00 h LT) and post-midnight (00:00- 06:00 h LT) periods and studied over a span of 20 days before the occurrence of earthquakes. The results show that foF2 are reduced in both the time sectors prior to the occurrence of main shocks. In pre-midnight sector the reduction is between 24 and 30%, 0 to 4 days before the main shocks and in the post-midnight sector it is between 18 and 26%, 1 to 15 days before the main shocks. The foEs show enhancements by 100 to 155% during the same periods. The effects of magnetic storms (Kp and Dst variations) on the data are identified clearly but they do not vitiate the effects of earthquakes. The earthquake related anomalies are interpreted in terms of electromagnetic coupling between the lithosphere and ionosphere during earthquakes preparation processes. | en |
| dc.language.iso | English | en |
| dc.relation.ispartofseries | 1/50 (2007) | en |
| dc.subject | ionosphere | en |
| dc.subject | E- and F-layers | en |
| dc.subject | earthquakes-magnetic storm | en |
| dc.subject | foF2 and foEs | en |
| dc.title | Simultaneous ionospheric E- and F-layer perturbations caused by some major earthquakes in India | en |
| dc.type | article | en |
| dc.type.QualityControl | Peer-reviewed | en |
| dc.subject.INGV | 01. Atmosphere::01.02. Ionosphere::01.02.06. Instruments and techniques | en |
| dc.relation.references | CHUO, Y.J., J.Y. LIU, S.A. PULINETS and Y.I. CHEN (2002): The ionospheric perturbations prior to the Chi-Chi and Chia Yi earthquakes, J. Geodyn., 33, 509-517. DAVIES, K. and D.M. BAKER (1965): Ionospheric effects observed around the time of the Alaskan earthquake of March 28, 1964, J. Geophys. Res., 70, 2251-2263. DEVI, M., M.K. BARMAN, A.K. BARBARA and M. DEPUEVA (2001): Total electron content near anomaly crest as precursor of earthquake, Ind. J. Radio Space Phys., 30, 209-213. DEVI, M., A.K. BARBARA and A. DEPUEVA (2004): Association of Total Electron Content (TEC) and foF2 variations with earthquake events at the anomaly crest region, Ann. Geophysics, 47 (1), 83-91. GOKHBERG, M.B., L.E. KOLOCOLOV, V.A. LIPEROVSKI, O.A. POKHOTELOV, A.M. BULOSHNIKOV, A.V. MARAKHOVSKI and E.V. LIPEROVSKAYA (2002): Manifestation of the strong earthquakes preparing effects in the sporadic Es layers on different latitudes, Preprint IZMIRAN (Moskow), 1 (1988). JAIN, S.K. and B. SINGH (1977): Vertical motions of the lowand equatorial-latitude F2 layers during prolonged and isolated magnetic storms, J. Geophys. Res., 82, 723-726. JAIN, S.K., D.P. SINGH and B. SINGH (1979): Effect of magnetic storms on the low latitude F-layer, Ind. J. Radio Space Phys., 8, 20-23. KIM, V.P. and V.P. HEGAI (1999): A possible presage of strong earthquakes in the nighttime mid latitudes F2 region ionosphere, in Atmospheric and Ionospheric Electromagnetic Phenomena Associated with Earthquake, edited by M. HAYAKAWA (Terra Scientific Publishing Co., Tokyo), 619-627. LAKSHMI, D.R., B.M. REDDY and S. SASTRI (1983): A prediction model for equatorial low latitude HF communication parameters during magnetic disturbances, Ind. J. Radio Space Phys., 12, 1-18. LAKSHMI, D.R., B. VEENADHARI, R.S. DABAS and B.M. REDDY (1997): Sudden post-midnight decreases in equatorial in F-region electron densities associated with severe magnetic storms, Ann. Geophysicae, 15, 306-313. LIPEROVSKI, V.A., O.A. POKHOTELOV and S.L. SHALIMOV (1992): Ionospheric Precursors of the Earthquakes (Nauka Publ., Moscow), pp. 304. LIU, J.Y.,Y.I. CHEN, S.A. PULINETS,Y.B. TSAI and Y.J. CHUO (2000): Seismo ionospheric signature prior to M≥6.0 Taiwan earthquakes, J. Geophys. Res., 27, 3113-3116. LIU, J.Y., Y.I.CHEN, Y.J. CHUO and H.F. TSAI (2001): Variations of ionospheric total electron content during the Chi-Chi earthquake, J. Geophys. Res., 28, 1383-1386. OGAWA, T., O. TAKAHASHI, Y. OTSUKA, K. NOZAKI, M. YAMAMOTO and K. KITA (2002): Simultaneous middle and upper atmosphere radar and ionospheric sounder observations of mid latitude E-region irregularities and sporadic E-layers, J. Geophys. Res., 107 (A10), doi: 10.1029/2001 JA 900176. ONDOH, T. (1999): Seismo-ionospheric effects, in Atmospheric and Ionospheric Electromagnetic Phenomena Associated with Earthquake, edited by M. HAYAKAWA and Y. FUJINAWA (Terra Scientific Publishing Co., Tokyo), 789-803. ONDOH, T. (2000): Seismo-ionospheric phenomena, Adv. Space. Res., 26, 1267-1272. ONDOH, T. (2003): Anomalous sporadic E-layers observed before M 7.2 Hyogo-ken Nanbu earthquake; Terrestrial gas emanation model, Adv. Polar Upper Atmos. Res., 17, 96-108. ONDOH, T. and M. HAYAKAWA (1999): Anomalous occurrence of sporadic E-layers before the Hyogoken-nanbu earthquake, M 7.2 of January 17, 1995, in Atmospheric and Ionospheric Electromagnetic Phenomena Associated with Earthquakes, edited by M. HAYAWAKA (Terra Scientific Publishing Co., Tokyo), 629-639. ONDOH, T. and M. HAYAKAWA (2002): Seismo discharge model of anomalous sporadic-E ionization before great earthquakes, in Seismo Electromagnetic: Lithosphere-Atmosphere Coupling (Terra Scientific Publishing Co., Tokyo), edited by M. HAYAKAWA and O.A. MOLCHANOV, 385-390. PULINETS, S.A., A.D. LEGEN’KA, A.T. KARPACHEV, N.A. KOCHENOVA, V.V. MIGULIN, V.N. ORVESKI and M.D. FLIGEL (1991): On the possibility of earthquakes prediction on the basis of topside satellite sounding, Preprint IZIMIRAN, 34a (981). PULINETS, S.A., A.D. LEGEN’KA and V.A. ALESKEEV (1994): Pre earthquake ionospheric effects and their possible mechanisms, in Dusty and Dirty Plasmas, Noise, and Chaos in Space and in the Laboratory (Plenumn Press, New York), edited by H. KIKUCHI, 545-557. RUZHIN, YU.YA. and A.Kh. DEPUEVA (1996): Seismo precursor in space plasma and wave anomalies, J. Atmos. Electr., 16, 271-288. SINGH, O.P. and B. SINGH (2004): Ionization enhancements in sporadic E-layers prior to some major Indian earthquakes, J. Atmos. Electr., 24, 75-87. SINGH, B., V. KUSHWAH, O.P. SINGH, D.R. LAKSHMI and B.M. REDDY (2004): Ionospheric perturbations caused by some major earthquakes in India, J. Phys. Chem. Earth, 29, 537-550. SOROKIN, V.M. and V.M. CHMYREV (1999): The physical model of electromagnetic and plasma response of the ionosphere on the pre-earthquake processes, in Atmospheric and Ionospheric Electromagnetic Phenomena Associated with Earthquake, edited by M. HAYAKAWA (Terra Scientific Publishing Co., Tokyo), 819-828. YOSHIMATSU, R. (1938): Abnormal variations of Earth-current potentials accompanied ith the earthquake off the cape of Sioya, May 23, 1938, Mem. Akioka Magn. Obs., 1, 1-11. | en |
| dc.description.journalType | JCR Journal | en |
| dc.description.fulltext | open | en |
| dc.contributor.author | Singh, C. | en |
| dc.contributor.author | Singh, O. P. | en |
| dc.contributor.department | Department of Electronics and Communication Engineering, Faculty of Engineering and Technology, R.B.S. College, Bichpuri, Agra, India | en |
| dc.contributor.department | Department of Physics, Faculty of Engineering and Technology, R.B.S. College, Bichpuri, Agra, India | en |
| item.openairetype | article | - |
| item.cerifentitytype | Publications | - |
| item.languageiso639-1 | en | - |
| item.grantfulltext | open | - |
| item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
| item.fulltext | With Fulltext | - |
| crisitem.author.dept | Department of Electronics and Communication Engineering, Faculty of Engineering and Technology, R.B.S. College, Bichpuri, Agra, India | - |
| crisitem.author.dept | Department of Physics, Faculty of Engineering and Technology, R.B.S. College, Bichpuri, Agra, India | - |
| crisitem.classification.parent | 01. Atmosphere | - |
| Appears in Collections: | Annals of Geophysics | |
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| 11Singh.pdf | 1.68 MB | Adobe PDF | View/Open |
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