Which of the following events would be the most interesting to a geologist? san francisco earthquake return of the hale-bopp comet the discovery of uranium the annual migration of humpback whales

The correct answer would be - San Francisco earthquake.

Explanation:

Geologist is the scientists or the researcher that studies the different forms of the matter present on the earth including gaseous, solid and liquid that makes the earth.

In given options only the earthquake of San Francisco is related to the geologist subject of interest. A geologist has nothing to do with astronomy, or chemistry or behavior zoology.

Thus, the correct answer is - San Francisco earthquake.