ANGEO Annales Geophysicae ANGEO Ann. Geophys. 1432-0576 Copernicus Publications Göttingen, Germany 10.5194/angeo-30-1451-2012 Interball-1 observations of flux transfer events Korotova G. I. 1 3 Sibeck D. G. 2 Petrov V. I. 2 IZMIRAN, Moscow Region, Troitsk, Russia NASA/GSFC, 8800 Greenbelt Rd, Greenbelt, MD, USA UMD, College Park, MD, USA 04 10 2012 30 10 1451 1462 Copyright: © 2012 G. I. Korotova et al. 2012 This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/ This article is available from https://angeo.copernicus.org/articles/30/1451/2012/angeo-30-1451-2012.html The full text article is available as a PDF file from https://angeo.copernicus.org/articles/30/1451/2012/angeo-30-1451-2012.pdf

We present the results of a survey of 807 FTEs observed by Interball-1 on the mid- and high-latitude dayside and flank magnetopause. Dayside magnetosheath events show a strong tendency to occur for southward magnetosheath magnetic fields suggesting origin via component (or perhaps antiparallel) reconnection near the equatorial plane. Flank FTEs occur for both magnetosheath magnetic field orientations with only a slight preference for southward magnetosheath magnetic fields. These events are consistent with generation along an extended subsolar component reconnection line for all IMF orientations or a combination of reconnection along a subsolar component reconnection line for southward IMF and antiparallel reconnection at higher latitudes for northward IMF. The distribution of direct and reverse magnetosheath FTEs and the tilt angle of the reconnection line for dawnward and duskward IMF are in a good agreement with the theoretical predictions of the component merging model. The clear anticorrelation between the magnitude of the east/west (Bm) perturbation observed within magnetosphere FTEs versus Bm in the magnetosheath also demands an explanation of the FTEs in terms of reconnection along a tilted subsolar merging line, e.g. in terms of component merging.

 References Aubry, M. P., Russell, C. T., and Kivelson, M.: Inward motion of the magnetopause before a substorm, J. Geophys. Res., 75, 7018–7031, 1970. Berchem, J. and Russell, C. T.: Flux transfer events on the magnetopause: Spatial distribution and controlling factors, J. Geophys. Res., 89, 6689–6703, 1984. Burch, J. L.: Precipitation of low-energy electrons at high-latitudes: Effects of interplanetary magnetic field and dipole tilt angle, J. Geophys. Res., 77, 6696–6707, 1972. Cowley, S. W. H.: The causes of convection in the Earth's magnetosphere: A review of developments during the IMS, Rev. Geophys. Space Phys., 20, 531–565, 1982. Cowley, S. W. H. and Owen, C. J.: A simple illustrative model of open flux tube motion over the dayside magnetopause, Planet. Space Sci., 37, 1461–1475, 1989. Crooker, N. U.: Dayside merging and cusp geometry, J. Geophys. Res., 84, 951–959, 1979. Ding, D. Q., Lee, L. C., and Ma, Z. W.: Different FTE signatures generated by the bursty single X line reconnection and the multiple X line reconnection at the dayside magnetopause, J. Geophys. Res., 96, 57–66, 1991. Farrugia, C. J., Elphic, R. C., Southwood, D. J., and Cowley, S. W. H.: Field and flow perturbations outside the reconnected field line region in flux transfer events: Theory, Planet. Space Sci., 35, 227–240, 1987. Fear, R. C., Fazakerley, A. N., Owen, C. J., and Lucek, E. A.: A survey of flux transfer events observed by Cluster during strongly northward IMF, Geophys. Res. Lett., 32, L18105, <a href="http://dx.doi.org/10.1029/2005GL023811">https://doi.org/10.1029/2005GL023811</a>, 2005. Fear, R. C., Palmroth, M., and Milan, S. E.: Seasonal and clock angle control of the location of flux transfer event signatures at the magnetopause, J. Geophys. Res., 117, A04202, <a href="http://dx.doi.org/10.1029/2011JA017235">https://doi.org/10.1029/2011JA017235</a>, 2012. Gonzales, W. D. and Mozer, F. S.: A quantitative model for the potential resulting from reconnection with an arbitrary interplanetary magnetic field, J. Geophys. Res., 79, 4186–4194, 1974. Kawano, H. and Russell, C. T.: Survey of flux transfer events observed with the ISEE 1 spacecraft: Rotational polarity and the source region, J. Geophys. Res., 101, 27299–27308, 1996. Kawano, H. and Russell, C. T., Cause of postterminator flux transfer events, J. Geophys. Res., 102, 27029–27038, 1997a. Kawano, H. and Russell, C. T.: Survey of flux transfer events observed with the ISEE 1 spacecraft: Dependence on the interplanetary magnetic field, J. Geophys. Res., 102, 10307–11313, 1997b. Kawano, H. and Russell, C. T.: Dual-satellite observations of the motions of flux transfer events: Statistical analysis with ISEE 1 and ISEE 2, J. Geophys. Res., 110, A07217, <a href="http://dx.doi.org/10.1029/2004JA010821">https://doi.org/10.1029/2004JA010821</a>, 2005. King, J. H.: Availability of IMP-7 and IMP-8 data for the IMS period, in: The IMS Source Book, edited by: Russell, C. T. and Southwood, D. J., AGU, Washington, D.C., 10–20, 1982. Klimov, S., Romanov, S., Amata, E., Blecki, J., Büchner, J., Juchniewicz, J., Rustenbach, J., Triska, P., Woolliscroft, L. J. C., Savin, S., Afanas'yev, Yu., de Angelis, U., Auster, U., Bellucci, G., Best, A., Farnik, F., Formisano, V., Gough, P., Grard, R., Grushin, V., Haerendel, G., Ivchenko, V., Korepanov, V., Lehmann, H., Nikutowski, B., Nozdrachev, M., Orsini, S., Parrot, M., Petrukovich, A., Rauch, J. L., Sauer, K., Skalsky, A., Slominski, J., Trotignon, J. G., Vojta, J., and Wronowski, R.: ASPI experiment: measurements of fields and waves on board the INTERBALL-1 spacecraft, Ann. Geophys., 15, 514–527, <a href="http://dx.doi.org/10.1007/s00585-997-0514-3">https://doi.org/10.1007/s00585-997-0514-3</a>, 1997. Kokubun, S., Yamamoto, T., Acuna, M., Hayashi, K., Shiokawa, K., and Kawano, H.: The Geotail magnetic field experiment, J. Geomagn. Geoelectr., 46, 7–21, 1994. Korotova, G. I., Sibeck, D. G., and Rosenberg, T.: Seasonal dependence of Interball flux transfer events, Geophys. Res. Lett., 35, L05106, <a href="http://dx.doi.org/10.1029/2008GL033254">https://doi.org/10.1029/2008GL033254</a>, 2008. Kuo, H., Russell, C. T., and Le, G.: Statistical studies of flux transfer events, J. Geophys. Res., 100, 3513–3519, 1995. Lee, L.-C. and Fu, Z.-F.: A theory of magnetic flux transfer at the Earth's magnetopause, Geophys. Res. Lett., 12, 105–108, 1985. Lepping, R. P., Acuña, M. H., Burlaga, L. F., Farrell, W. M., Slavin, J. A., Schatten, K. H., Mariani, F., Ness, N. F., Neubauer, F. M., Whang, Y. C., Byrnes, J. B., Kennon, R. S., Panetta, P. V., Scheifele, J., and Worley, E. M.: The Wind magnetic field investigation, Space Sci. Rev., 71, 207–229, 1995. Lockwood, M., Cowley, S. W. H., Smith, M. F., Rijnbeek, R. P., and Elphic, R. C.: The contribution of flux transfer events to convection, Geophys. Res. Lett., 22, 1185–1188, <a href="http://dx.doi.org/10.1029/95GL01008">https://doi.org/10.1029/95GL01008</a>, 1995. Neudegg, D. A., Cowley, S. W. H., Milan, S. E., Yeoman, T. K., Lester, M., Provan, G., Haerendel, G., Baumjohann, W., Nikutowski, B., Büchner, J., Auster, U., Fornacon, K.-H., and Georgescu, E.: A survey of magnetopause FTEs and associated flow bursts in the polar ionosphere, Ann. Geophys., 18, 416–435, <a href="http://dx.doi.org/10.1007/s00585-000-0416-0">https://doi.org/10.1007/s00585-000-0416-0</a>, 2000. Nishida, A.: Can random reconnection on the magnetopause produce the low latitude boundary layer?, Geophys. Res. Lett., 16, 227–230, 1989. Nozdrachev, M. N., Skalsky, A. A., Styazhkin, V. A., and Petrov, V. G.: Some results of measurements by the FM-3I flux-gate instrument onboard the Interball-1 spacecraft, Cosmic Res., 36, 251–255, 1998. Raeder, J.: Flux Transfer Events: 1. generation mechanism for strong southward IMF, Ann. Geophys., 24, 381–392, <a href="http://dx.doi.org/10.5194/angeo-24-381-2006">https://doi.org/10.5194/angeo-24-381-2006</a>, 2006. Rijnbeek, R. P., Cowley, S. W. H., Southwood, D. J., and Russell, C. T.: A survey of dayside flux transfer events observed by ISEE 1 and 2 magnetometer, J. Geophys. Res., 89, 786–800, 1984. Roelof, E. C. and Sibeck, D. G.: Magnetopause shape as a bivariate function of interplanetary magnetic field $B_\text{z}$ and solar wind dynamic pressure, J. Geophys. Res., 98, 21421–21450, 1993. Russell, C. T. and Elphic, R. C.: Initial ISEE magnetometer results: Magnetopause observations, Space Sci. Rev., 22, 681–715, 1978. Russell, C. T., Berchem, J., and Luhmann, J. G.: On the source regions of flux transfer events, Adv. Space Res., 5, 363–368, 1985. Safrankova, J., Zastenker, G., Nemecek, Z., Fedorov, A., Simersky, M., and Prech, L.: Small scale observation of magnetopause motion: preliminary results of the INTERBALL project, Ann. Geophys., 15, 562–569, <a href="http://dx.doi.org/10.1007/s00585-997-0562-8">https://doi.org/10.1007/s00585-997-0562-8</a>, 1997. Sanny, J., Sibeck, D. G., Venturini, C. C., and Russell, C. T., A statistical study of transient events in the outer dayside magnetosphere, J. Geophys. Res., 101, 4939–4952, 1996. Sanny, J., Beck, C., and Sibeck, D. G.: A statistical study of the magnetic signatures of FTEs near the dayside magnetopause, J. Geophys. Res., 103, 4683–4692, 1998. Sauvaud, J.-A., Koperski, P., Beutier, T., Barthe, H., Aoustin, C., Thocaven, J. J., Rouzaud, J., Penou, E., Vaisberg, O., and Borodkova, N.: The INTERBALL-Tail ELECTRON experiment: initial results on the low-latitude boundary layer of the dawn magnetosphere, Ann. Geophys., 15, 587–595, <a href="http://dx.doi.org/10.1007/s00585-997-0587-z">https://doi.org/10.1007/s00585-997-0587-z</a>, 1997. Scholer, M.: Magnetic flux transfer at the magnetopause based on single X line bursty reconnection, Geophys. Res. Lett., 15, 291–294, 1988. Sibeck, D. G. and Lin, R.-Q.: Concerning the motion of flux transfer events generated by component reconnection across the dayside magnetopause, J. Geophys. Res., 115, A04209, <a href="http://dx.doi.org/10.1029/2009JA014677">https://doi.org/10.1029/2009JA014677</a>, 2010. Sibeck, D. G. and Lin, R.-Q.: Concerning the motion and orientation of flux transfer events produced by component and antiparallel reconnection, J. Geophys. Res., 116, A07206, <a href="http://dx.doi.org/10.1029/2011JA016560">https://doi.org/10.1029/2011JA016560</a>, 2011. Sibeck, D. G., Korotova, G. I., Petrov, V., Styazhkin, V., and Rosenberg, T. J.: Flux transfer events on the high-latitude magnetopause: Interball-1 observations, Ann. Geophys., 23, 3549–3559, <a href="http://dx.doi.org/10.5194/angeo-23-3549-2005">https://doi.org/10.5194/angeo-23-3549-2005</a>, 2005. Sonnerup, B. U. O.: Magnetopause reconnection rate, J. Geophys. Res., 79, 1546–1549, 1974. Southwood, D. J., Saunders, M. A., Dunlop, M. W., Mier-Jedrzjowicz, W. A. C., and Rijnbeek, R. R.: A survey of flux transfer events recorded by the UKS spacecraft magnetometer, Planet. Space Sci., 34, 1349–1359, 1986. Southwood, D. J., Farrugia, C. J., and Saunders, M. A.: What are flux transfer events, Planet. Space Sci., 36, 503–508, 1988. Wang, Y. L., Elphic, R. C., Lavraud, B., Taylor, M. G. G. T., Birn, J., Raeder, J., Russell, C. T., Kawano, H., Zong, Q.-G., Zhang, H., Zhang, X. X., and Friedel, R. H.: Initial results of high-latitude magnetopause and low-latitude flank flux transfer events from 3 years of Cluster observations, J. Geophys. Res., 110, A11221, <a href="http://dx.doi.org/10.1029/2005JA011150">https://doi.org/10.1029/2005JA011150</a>, 2005. Zeleny, L. M. and Sauvaud, J. A.: Interball-1: first scientific results, Ann.&nbsp;Geophys., 15, 511–513, 1997.