Mexican earthquake triggers 4-foot waves in Death Valley National Park — 1,500 miles away

A magnitude 7.6 earthquake rattled Mexico's Pacific coast on Monday and left at least two people dead in its wake. Repercussions of the tremor extended as far as 1,500 miles north, where four-foot-tall waves began churning inside a Death Valley cave called Devils Hole, in what the National Park Service called a "surprising quirk of geology."

Video footage of the phenomenon — which is technically known as a seiche, when sudden changes are observed in a lake or partially enclosed body of water — shows a birds-eye view of the cave as its initially still water erupts into a series of waves that roil and crash intermittently over the course of several minutes.

Devils Hole is a geothermal pool within a limestone cave, located in a section of Death Valley near the border of Nevada and California. The cave itself is hundreds of feet deep, as the park service noted in a news release explaining the "desert tsunami" recorded late Monday morning, but its relatively shallow water level is crucial for the endangered marine species, called pupfish, that live there.