Seismic Crypto

In a NYT report today on a "mysterious" blast in the Australian outback in 1993, there's mention of "seismic weapons" and research on them by Nicholas Tesla in the 1930s. Would any of our weapons connoisseurs have more info on what these are and how they were supposed to work? Electrical, chemical, nuclear? That Aussie blast has still not been identified except that it was something in the nuclear weapon, earthquake or meteorite range. The Arum sect, which owned 500,000 acres in the viciniity, was a suspect for a while but later cleared, although it was looking into seismic weapons. Will send the story: WHA_the Or read it at www.nytimes.com