Canada.Shirleys Bay · the Project Magnet gravimeter reading

On Sunday, August 8, 1954, at 3:01 p.m. according to Wilbert B. Smith's later account, the recording gravimeter at the Shirleys Bay station, about 16 kilometres west of Ottawa, traced a deflection that Smith attributed to the passage of an unidentified flying object. The station belonged to Project Magnet, the program the Canadian Department of Transport had authorized in December 1950 at Smith's request; Smith was the engineer in charge of the Broadcast and Measurement Section of its Telecommunications Division. The Canadian Press had announced on November 11, 1953, in a dispatch the New York Times reprinted the next day, that a "flying saucer sighting station" was being built at Shirleys Bay to prove or disprove the existence of saucers. The equipment, as described by Donald Keyhoe after visiting the hut, included an ionosphere reactor, an electrical device for measuring sound, a gamma-ray detector and a gravimeter. Keyhoe had known Smith since 1950, when Smith already told him that Project Magnet reports indicated the saucers were interplanetary.

The account of August 8 that survives under Smith's name is short and carries no date of writing; researcher Grant Cameron posted it in 2009 on his Presidential UFO site, and NICAP keeps a copy. Smith says that for months he and his small group had watched the gravimeter in vain, and that large commercial airliners passing over made the instruments register activity. At 3:01 p.m., he writes, the gravimeter began acting strangely: first it waved, drawing a thin dark line on the graph paper, and then it "went wild". Alarms connected to the panel rang; after watching the instruments for a few seconds they ran outside to see what was causing the reaction, but the area was "completely fogged in" and nothing could be seen. Smith concludes that "all evidence" indicated a real object had flown within feet of the station. None of the sources consulted reproduces the chart or gives a figure for the deflection.

There is a near-contemporary echo. In The Flying Saucer Conspiracy (1955), Keyhoe reconstructs a conversation from early September 1954 in which he says Smith had written to him the previous month about a startling gravimeter reading on August 8: the sky was overcast, so he and the staff could not see what made the needle jump, but Smith was positive a spaceship had passed overhead. Keyhoe does not reproduce the letter, and his dialogues are an author's reconstructions. The hourly observations from Ottawa airport for that day, in Environment Canada's climate archive, give "Mostly Cloudy" skies at 14:00 and 15:00 standard time (the 3:01 p.m. reading, probably in daylight time, would fall around 14:01), with 25 kilometres of visibility and relative humidity around 41%: they are compatible with the cloudy sky of Keyhoe's version (by 16:00 the record reads "Cloudy") and not with fog, although the airport is about 20 kilometres from the station.

On August 31, 1954, Deputy Minister of Transport J. R. Baldwin announced that the station would close (Keyhoe dates the announcement September 1 and sums it up this way: the station was closed "because no flying saucers had been recorded"). The Ottawa Journal clipping headlined "Saucer Station Shut At Shirley Bay: 'Nothing Came of It'", which the CIA filed alongside a March 1956 memorandum by its Deputy Director for Intelligence, Robert Amory Jr., gives the official reason: "We decided that nothing so far had come out of the station's operations to merit further expenditures of Government time on it." The clipping adds that Smith would be free to keep working "on his own time" with the equipment "if it is available", that the investigation was left to the Defence Research Board, and that the station had been built with the blessing of former Transport Minister Chevrier, who then considered it "worthwhile, for the small cost (about $16,000)". The agency dispatch (A.C.P.) printed by La Bourgogne Républicaine on September 1 goes further: in that version, Smith "admitted" the post had observed nothing since its construction, although he intended to continue the experiment on his own. Keyhoe cites Smith's letter about August 8 precisely to dispute that announcement.

The case is often cited as the instrumental detection of a UFO by a station a government built for the purpose, and the version circulating today adds that the Canadian government closed the station two days after the detection. The documents of the time do not support that sequence: the closure was announced on August 31 (or September 1, according to Keyhoe), about three weeks later, and the reason the deputy minister gave was that the station had produced nothing to justify further spending. Smith himself, in the statement on Project Magnet that Saucers magazine printed in March 1956, attributed the official abandonment of the project, which he dated to October 1954, to the publicity surrounding the subject, and did not mention the August 8 reading; while the station was still running, Baldwin had already told Keyhoe it had "received more publicity than anyone expected". No document has been found either for the claim, repeated in recent articles, that the CIA was told of the reading the same day: the only CIA file consulted holds the clipping about the closure, not the detection.

What remains is the testimony of a single named author (Smith; his small team left no account of its own) about a single instrument, with no published chart, no visual sighting and two accounts of the weather that disagree with each other. The central contradiction is between what Smith wrote privately (to Keyhoe in August 1954 and in the text Cameron posted) and what an agency dispatch attributed to him publicly at the end of that month, that the post had observed nothing; one reconciling reading is that "observed" meant seeing an object, but no source settles it. The most useful fact for weighing the reading comes from Smith himself: the instrument already reacted to passing airliners, so a deflection is not enough, on its own, to infer an unknown object. A spring gravimeter responds to vibration, temperature changes and ground shaking; the USGS earthquake catalogue lists no earthquake of magnitude 4 or above anywhere that day, although for 1954 that catalogue is only complete for large quakes. No source has proposed a specific cause for the trace.

Even so, the episode has real historical interest. It is an early attempt to move from visual testimony to continuous physical measurement, the same idea behind today's sensor networks devoted to anomalous phenomena, and it shows the difficulties from the start: a sensitive instrument with no calibration against ordinary sources, a man in charge already convinced of the extraterrestrial hypothesis, and a record that never left private hands. The August 8 reading can only be re-examined if the original chart turns up among Smith's papers or in the Department of Transport holdings at Library and Archives Canada.