Southern California not only has to deal with Tropical Storm Hilary — now there’s been an earthquake as well.

Hilary was a tropical storm with 65 mph winds on Sunday afternoon when it made landfall on Mexico’s Baja California coast. On Sunday evening Hilary was spreading flooding rains well inland and into the Southwest U.S. as its center tracked into southern California, the first storm to do that since the 1930s.

Southern California was covered in flash flood warnings as of Sunday evening, with more rain expected.

Hilary made landfall just before 1 p.m. CDT Sunday in northern Baja California in Mexico.

Then the U.S. Geological Survey reported a magnitude 5.1 earthquake southeast of Ojai, Calif. (about 60 miles northwest of Los Angeles) at 4:41 p.m. CDT on Sunday.

The Los Angeles Times reported minor damage from the quake, which has been followed by multiple aftershocks. There was no tsunami threat, according to the USGS.

The term “hurriquake” soon after began trending on social media. But could the two things be related?

Some have theorized that the tremendous amount of water that tropical systems spread over land areas could, in theory, prompt seismic activity.

The U.S. Geological Survey, however, has downplayed that possibility.

There’s no conclusive evidence of “hurriquakes,” but there is research related to the subject.

Dr. Marshall Sheperd, an expert on weather and climate and the director of the Atmospheric Sciences Program at the University of Georgia, wrote a piece for Forbes on the matter on Sunday and pointed to a study from Stony Brook University that showed, through computer modeling, that stress on California’s storied fault lines is higher during years where there is more rainfall.

Dr. Shepherd, however, stressed that he had “absolutely no evidence to say ‘yes’ to that question and to do so would be completely speculative.”