HMI Science Nugget #2 "Testing Hemispheric Rule of Helicity with HMI Data"

New HMI Science Nuggets are available at http://hmi.stanford.edu/hminuggets, featuring the following topic

#2 "Testing Hemispheric Rule of Helicity with HMI Data" contributed by Yang Liu

Hemispheric helicity preference in groups of active regions with different properties suggests different origins of magnetic twist.

We invite those who use HMI data for their research, or whose research is closely related to HMI science objectives, to contribute to the HMI science nuggets. -- SDO/HMI team