Looks like you have quite a few good answers, but I thought I'd throw my two cents in!
I agree, that if it sounds bad/forced to you, it will sound even more so that way to a reader.
Some of the alternative examples of the convo work. Also, you could mix dialogue with the character's thoughts. For example, if character 1 comments on the earthquakes, the MC could go on to think more about the topic. For example:
"Another earthquake this morning... that makes three this week!" Suzy exclaimed.
Bob shook his head. Ever since the T. Corporation drilling destabilized the core, drawing it into collision with the gas giant, there had been a steady stream of earthquakes. And with each passing week, matters were only getting worse.
Now Suzy or Bob remarks on how the earthquakes are getting more violent, or begin to complain bitterly about T. Corps carelessness! And so on.
If there is information they both know, it would be better if the MC summarizes it in his/her thinking. Or you could introduce a character into the conversation who doesn't know anything about the situation so that it is the characters who do know it explaining it to the one who doesn't.
Anyway, best of luck!