According to Tom Brocher and the US Geological Survey, what is the cumulative likelihood of a Bay Area earthquake larger or equal to a M6.7 by the year 2043?

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.