GEO-EFFECTIVE SOLAR FLARE EVENTS IN DECEMBER 2006 RECORDED CLOSE TO VENUS AND MARS Y. Futaana, S. Barabash, M. Yamauchi, R. Lundin Swedish Institute of.

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Presentation transcript:

GEO-EFFECTIVE SOLAR FLARE EVENTS IN DECEMBER 2006 RECORDED CLOSE TO VENUS AND MARS Y. Futaana, S. Barabash, M. Yamauchi, R. Lundin Swedish Institute of Space Physics & Aspera-3 and -4 team

ASPERA-3 and -4 team R. Lundin, H. Andersson, A. Grigoriev, IRF, Kiruna, Sweden M. Holmström, M. Yamauchi, Y. Futaana K. AsamuraJAXA / ISAS, Sagamichara, Japan W. Baumjohann, T. ZhangSRI, Graz, Austria P. Bochsler, P. WurzUBe, Switzerland P. C:son Brandt, E. RoelofAPL /JHU, Laurel, USA A. Coates, D.R.Linder, D.O.Kataria MSSL, UK C. C. Curtis, K. C. Hsieh, B. R. Sandel UA, Tucson, USA A. Fedorov, J.-J. Thocaven CESR, Toulouse, France R. Frahm, J. Sharber, D. Winningham SwRI, San Antonio, USA M. GrandeRAL, Oxfordshire, UK H. Koskinen, E. Kallio, P. Riihela, T. Säles FMI, Helsinki, Finland J. Kozyra SPRL /U. of Michigan, Ann Arbor, USA N. Krupp, J. Woch MPAe, Katlenburg-Lindau, Germany J. Luhmann SSL /U. of California in Berkeley, USA S. McKenna-Lawlor STIL, Ireland S. Orsini, R. Cerulli-Irelli, A. Mura, A. MililloIFSI, Rome, Italy K. SzegoKFKI, Budapest, Hungary

SOLAR FLARE ON 5 DEC 2006 An active region NOAA 0930 made series of X-class flares in December 2006 X9.0 (December 5, (E79, S07) X6.5 (December 6, 18:42 UT) X3.4 (December 13, 02:24 UT) X1.5 (December 14, 22:10 UT) TRACE data :29 UT

SOLAR FLARE ON 5 DEC 2006

Mars Express and Venus Express was operation in December From the largest flare location on 5th Dec., the Earth was ~80˙ westward, and Venus and Mars were ~80˙ and ~125˙ eastward, respectively. Venus and Mars was on the same Parker spiral. SOLAR FLARE ON 5 DEC 2006

SEP longitudinal extent (Reames' review, 1999) CME front is the source Therefore, wide spread but, never 180° Heos-1, Heos-2, IMP-8

SEPs at Mars SEPs (=increases of IMA/ELS background level) had been arrived before 14UT on 5 December SEPs flying time was less than 3.5 hrs. Corresponding energy is >1.7 MeV/amu

SEPs at Earth SEPs are detected by GOES 11 at the Earth at UT on 5 Dec 2006 McKenna Lawlor et al., submitted to JGR

SEPs at Venus As soon as the operation of VEX/ASPERA-4 started at 05:30 UT on 6th Dec, SEPs were detected.

CMEs at Venus and the Earth Change of solar wind energy at Venus, which is very similar signature observed at the Earth by SOHO. 0.7 keV (350 km/s) on Dec keV (550 km/s) on Dec 7 3 keV (750 km/s) on Dec 8 Extents of CMES are inferred more than 160˚

CMEs at Venus and the Earth

Influence to Martian ion outflow During the SEP event, MEX/ASPERA-3 recorded energization (up to several keV) and enhancement of ion outflow flux (~5-10 times).

Summary (1) An active region NOAA 0930 made series of geo-effective X- class flares in December At Venus and Mars, VEX and MEX made observations, and detected associated SEPs by measuring increases of background level of ASPERA sensors. VEX recorded CMEs, whose signatures resemble those recorded around the Earth The SEPs and CMEs associated with the active region 0930 disturbed quite a wide region of the heliosphere.

Summary (2) During this violent SEP event, MEX/ASPERA-3 recorded energization (up to several keV) and enhancement of ion outflow flux (~5-10 times). While this result is predicted by theoretical investigations and model calculations, this is the first observation. As a next step, statistical analysis of the correlation between the background SEPs or UV flux and outflow flux has been just started. This work will provide the role of the solar wind to evolution of planetary atmosphere in a geological time scale.

PRESS RELEASED FROM EUROPLANET! FLARES FROM THE FAR SIDE OF THE SUN MAY AFFECT SPACE WEATHER OF INNER PLANETS eu.org/index.php?option=com_content&task=view&id=105&Itemi d=32 Some articles show this result! DentalPlans.com, FL - Aug 24, Science Daily (press release) - Aug 24, MSNBC - USA - Aug 23, Mars Today (press release) - Aug 23, Space Ref (press release) - Aug 23, innovations report, Germany - Aug 23, LiveScience.com, NY - Aug 22, Space.com - Aug 22, Interview from US radio program - Earth Changes Media

SEP longitudinal extent (Reames, 1999)