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The Leverhulme Flare Seismology workshop will take place at Mullard Space Science Laboratory from Monday September 9 to Thursday September 12, 2013.

This workshop aims to understand further the origins of photospheric acoustic emission which occur in association with solar flares and eruptions. In the years after the first reported observation of a sunquake by Kosovichev and Zharkova in 1998 only a limited number of flares were seen to be seismically active. More recently, the continuous view of the Sun at high spatial resolution given by SDO and new techniques for the reliable detection of sunquakes has led to an increasing number of observations of seismically active events.

Sunquakes impose some of the most severe constraints on our understanding of how energy and momentum are transferred from the solar atmosphere to the interior. The wealth of data now available from SDO, Hinode, RHESSI and ground-based telescopes means that the time is ripe for significant developments in understanding the underlying mechanisms that drive of these spectacular events.

Two active regions with good data coverage are selected and the data are available to be worked on before and during the workshop. Suggested questions to be addressed during the workshop are:

1. Discriminating between currently proposed mechanisms - what do the current photospheric/chromospheric/coronal observations show us and what are the energetics of the particle beams and Lorentz transients?

2. The role of the magnetic field - what role does the magnetic structure, field strength and evolution play? As determined from vector field observations, extrapolations and simulations of flares and eruptions.

3. Sunquake wavefront anisotopy - what is the underlying cause of this - is it due to sub-surface structure or is it related to the sunquake mechanism?

4. Sub-surface properties - how reliable are the heliseismic inversions and what can we learn from different methods?

5. Sunquake properties - how can we make the inferences of onset time, sunquake energy, location and source properties more accurate?

Participants are invited to suggest, and give feedback on, questions to be addressed.

-- SergeiZharkov - 19 Aug 2013

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Topic revision: r1 - 2013-08-19 - SergeiZharkov
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