![]() ![]() Recommended: America Can't Shoot Down a North Korean Nuke In 2001, a paper produced at the the California Institute of Technology ‘s Graduate Aeronautical Labs analyzed the booms and concluded that whatever they were, they came from some unknown, offshore event. Geological Survey have inadvertently picked up the booms. Designed to record tremors in the Earth, seismographs monitored by the U.S. Whatever was creating the sonic booms, they were picked up by California’s earthquake monitoring network. The booms are from Aurora returning to bases in southern California after flying over the Pacific Ocean. And Aurora watchers have their own explanation. But some of these sonic booms are obviously from run-of-the-mill military sources. Many are undoubtedly from natural phenomena, such as meteorites entering Earth’s atmosphere. One such report from April 2009 was investigated by the local press, which could find no explanation for it. To this day, sonic booms are still reported across swathes of southern California. In the early ’90s, a series of mysterious sonic booms began rattling the California coastline, noises that defied easy explanation. Recommended: China's New Stealth Fighter Has Arrived ![]() The SR-71 was pulled out of service two years later and made a brief comeback in the late 1990s. In 1988, The New York Times reported that a successor to the SR-71 was being developed-one capable of flying at Mach 5. ![]()
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