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Hinode Coordinated Observations: Sunquakes

Hinode Coordinated Observations: Sunquakes. Flares can drive acoustic disturbances in the interior – S unquakes (Wolff, 1971). Observationally confirmed by Kosovichev & Zharkova (1998) Generation mechanism still hotly debated: Chromospheric shocks, Direct particle precipitation,

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Hinode Coordinated Observations: Sunquakes

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  1. Hinode Coordinated Observations: Sunquakes Flares can drive acoustic disturbances in the interior – Sunquakes (Wolff, 1971). Observationally confirmed by Kosovichev & Zharkova (1998) Generation mechanism still hotly debated: • Chromospheric shocks, • Direct particle precipitation, • Back-warming, • Lorentz force transients? Kosovichev & Zharkova (1998) Contributed by the Hinode/EISteam through the University College London

  2. Hinode Coordinated Observations: Sunquakes New insights from Hinode • Poor correlation between WL, HXR and strongest quake – inconsistent with back-warming. • Quake coincident with end of erupting flux rope – supports new findings by Zharkov et al. (2011) X End of the erupting flux rope (XRT). Left: SOT G-band difference Right: SOT Ca II H Contours: Black – quake, Red: 20-30 keV; Yellow: 40-100 keV. Matthews et al., 2011 Contributed by the Hinode/EISteam through the University College London

  3. Hinode Coordinated Observations: Sunquakes EIS: new insights into velocity shifts during quakes Top left: Quake 6 mHz egression source black contour) overlaid on Ca II; Top right: XRT Be thin with Ca II H contours; Bottom left: EIS Fe XXIV at the quake location, showing large blue-shifted component. (Matthews et al., in prep) Contributed by the Hinode/EISteam through the University College London

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