(CNN) The bomb cyclone that pounded the West Coast last week brought with it some of the tallest waves ever recorded off the California coast.

A monstrous 75-foot wave was recorded about 20 miles off the coast of Cape Mendocino in northern California, according to the University of California, San Diego's Coastal Data Information Program

In the 15 years the program has operated a station in that location, the significant wave height -- or the average height of the tallest third of waves that occur over 30 minutes -- typically doesn't exceed 10 feet tall during the winter.

The 75-footer was the tallest of the waves recorded in that period, which averaged around 43 feet tall. Still, that's "definitely unusual" for this time of year, program manager James Behrens told CNN.

"These kinds of really large waves are usually only detected way out in the middle of the ocean, when winds are being generated," he said.

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