Indications of magnetic reconnection
   derived from photospheric magnetic field measurements

T. Shimizu

Magnetic field measurements are highly important in coordination
with observations of solar coronal topology to understand
physical process involved in coronal dynamics, such as
microflares. However, the biggest observational restriction
is that solar magnetic fields can be accurately measured only
in a thin layer at the photospheric level, which may be located
apart from magnetic reconnection sites in dynamical events.
Recent high-cadence magnetogram observations and highly accurate
Stokes (magnetic-field vector) measurements have been providing
some observations to help us to understand how the energy release
is triggered and how the magnetic field configuration is
evolved in association with possible magnetic reconnections.
This paper will discuss these magnetic-field observations with
emphasis on magnetic reconnection.