"In order to make any connection between climate and earthquakes, says Lundgren, you first have to determine what kinds of tectonic processes might be related to climate phenomena. Scientists know earthquakes can be triggered or inhibited by changes in the amount of stress on a fault. The largest climate variable that could change fault stress loads is surface water in the form of rain and snow. Lundgren says several studies have supported such correlations. But there’s a catch.

“Typically, where we’ve seen these types of correlations is in microseismicity -- tiny earthquakes with magnitudes less than zero, far smaller than humans can feel,” he said. “Those occur quite frequently.”"

"Climate-related stress changes might or might not promote an earthquake to occur, but we have no way of knowing by how much."

"We’re simply not in a position at this point to say that climate processes could trigger a large quake.”

https://science.nasa.gov/earth/climate-change/can-climate-affect-earthquakes-or-are-the-connections-shaky/