again in part based on the flux-tube picture. Firstly, when the spatial resolution decreases, the small footpoints in the photosphere get smoothed out, which leads to a better correlation to the upper atmosphere, where the emission forms larger patches because of the fanning out of the flux tubes. Secondly, at lower resolution also flux tubes with an inclination to the line-of-sight will show a match between their footpoints and the emission higher up, leading to higher correlation. And thirdly, when observing at lower resolution, many of the small-scale opposite polarity magnetic concentrations will cancel in the polarisation signal resulting in a smoother magnetic field map, which in turn gives a better correlation to the emission in the fanned-out part of the flux tubes.

In their original work, @1989ApJ...337..964S suggestedWomen survive 'savage attack' from tree in Wolterton Published duration 16 September 2013

image caption "We thought the tree was only going to hit the bonnet," said Heather Hasthorpe

image caption The oak tree crushed the roof of the car and smashed through the windscreen

image caption The tree broke through the steering wheel and ripped away part of the driver's door panel

Two women have survived what they called a "savage attack" from a falling oak tree which smashed through the roof and windscreen of their moving car.

Helen Howes and Heather Hasthorpe were en route to a costume and textile fair at Wolterton Hall, Norfolk, on Saturday when the accident happened.

"The tree came through the windscreen and broke the wheel off from between my hands," said Mrs Howes.

A police spokesman said