Hangzhou Xiaoshan Airport UFO Incident (2010)

On the evening of 7 July 2010, the crews of two airliners preparing to land at Hangzhou Xiaoshan International Airport reported, at roughly the same time and at about 20:40, a moving luminous object to the southeast of the airport, which they relayed to the control tower.^[4][6] Air-traffic control suspended all takeoffs and landings; according to summaries of the event, the shutdown ran from about 20:45 to 21:41, with eighteen flights affected—six departing and twelve arriving—and some inbound flights diverted to Ningbo and Wuxi while outbound flights were held on the ground.^[1][5] Normal operations resumed within about an hour.^[1]

News of the closure, carried by the official Xinhua News Agency and quickly picked up abroad, framed the event as a UFO that had forced a major airport to stop flying, and noted that many Hangzhou residents had reported seeing a bright object in the sky before the disruption.^[5][1]

The most widely circulated piece of evidence was a photograph taken at about 20:26 that evening by Ma Shijun (麻世俊), a resident of Xinjie in Xiaoshan district, who is referred to in much of the coverage simply as "Mr. Ma."^[1][6] By his account he and his wife had gone out to try a newly bought Canon 500D digital SLR for night photography when he saw a bright, silent light moving rapidly across the sky and photographed it; the resulting image showed an elongated body with alternating red and white light and small bright points along one side that some observers likened to portholes.^[1][6]

The photograph spread rapidly on Chinese websites and became the visual centrepiece of domestic coverage of the case.^[1][6] The story was also picked up by international outlets, though Western reports often illustrated it with generic stock imagery rather than Ma's actual photograph.^[2][1] Later commentators cautioned that the long-exposure image is consistent with the trail left by a lit aircraft moving through the frame: analysts who examined the exposure data (a 2.5-second exposure at f/3.5, ISO 1600, 18 mm) estimated a speed of roughly 208–224 km/h—within the range of a conventional aeroplane rather than an exotic craft—and the photographer was later asked to shoot ordinary aircraft with the same settings, producing images said to match the original.^[6]

No detailed official verdict was announced immediately, and the East China regional civil-aviation administration was reported to be looking into the matter.^[1] Over the following weeks, several conventional explanations were advanced. Hangzhou meteorological officials suggested that photographs circulating from the afternoon of 7 July showed sunlight reflecting off an aircraft, while Zhu Jing (朱進) of the Beijing Planetarium said the night-time photograph looked like an aeroplane displaying its strobe lights.^[1]

The explanation most often repeated in later Chinese accounts is that the airspace disruption that evening was caused by an unauthorised, undeclared private aircraft—colloquially a "black flight" (黑飛)—that took off without clearance. On this account, civil-aviation radar treats any return that is not a scheduled flight as an unidentified blip, and an aircraft not transmitting on a transponder (or with it switched off) would not be properly identified, which is given as the reason the object did not appear as a normal flight.^[4]

Astronomer Wang Sichao (王思潮) of the Purple Mountain Observatory cautioned that, with the available evidence, the sighting could be variously consistent with an aircraft, a natural phenomenon, or a "special aircraft," and that a definitive determination would require detailed data on the object's appearance, location and timing collected from multiple vantage points; he did not claim it was a genuinely anomalous craft.^[3] Separately, the U.S.-based analyst Geoff Forden, writing on the *ArmsControlWonk* blog, proposed that one widely shared image might depict the exhaust plume of a ballistic-missile launch, while stressing the many approximations in his analysis and the uncertainty over which image corresponded to the airport event.^[7]

The closure of a major airport over an unidentified object made the Hangzhou case unusually prominent, and it has since been a recurring reference point in Chinese television documentaries, magazine features and online discussion of UFOs.^[4][6] It is often invoked as an example of how a dramatic sighting can later be reconciled with a prosaic cause once aviation and photographic factors are considered.^[4]

Despite this prominence, the incident has no standalone Wikipedia article in either Chinese or English; the Chinese Wikipedia records it only as a dated entry in its "list of UFO incidents," which notes the airport closure and states that, at the time, no explanation for the sighting had yet been given.^[5] Weighing the converging conventional accounts—chiefly the undeclared-aircraft conclusion and the long-exposure photographic interpretation—against the absence of any single, formally published official report, the case is generally treated as explained in substance rather than as an enduring mystery.^[1][4][6]