What are the odds against an earthquake occuring on a certain day in a certain area if the odds of it occurring is 0.05?

2 answers

5 out of 100? That means odds not occuring is 95/5 or 19/1.
I know that the odds of an earthquake over 5.5 on the Richter scale, occurring within the next second , and in San Francisco Bay Area is about 1 in 1.2 billion.

Based on the average number of larger Earthquakes reported in this area over the last 200 years.