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The Westall Case Has Remained Unsolved for Sixty Years

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On April 6, 1966, students and teachers at a Melbourne school watched a silvery object in the sky that was accompanied by light aircraft. The case became Australia's most famous UFO story, but there is a large gap between the contemporary accounts and the stories that have accumulated on top of them over sixty years. Some of the official records were destroyed, and to this day there is no official explanation.

When: April 6, 1966
Where: Westall, Australia
Witnesses: Students and teachers of Westall High School (including teacher Andrew Greenwood), pupils of a neighboring primary school, and local residents
Official position: There are no official investigation findings or explanation. In 1966, according to the Bureau of Meteorology, a weather balloon launched from Laverton may have drifted to the site; according to the air force (RAAF), it had no aircraft in the area; the Department of Civil Aviation found no unusual aircraft. The Department of Supply report was never made public, and the Department of Defence has still not released its records.

A Wednesday morning in Clayton South

Westall High School was located on the southeastern edge of Melbourne, in Clayton South. Next to the school lay the Grange, a scrubby area bordered by pine trees and dotted with paddocks, where the students held cross-country races.

On the morning of Wednesday, April 6, 1966, a physical education class was underway on the sports field. Science teacher Andrew Greenwood said in 1967 that a girl ran into his class saying there was a flying saucer outside. During the morning recess, Greenwood went out himself. According to him, the girl from the PE class had already been watching the object for ten minutes by the time he got there, and the phenomenon began between 10:15 and 10:20.

What did they see in 1966?

The earliest accounts are still restrained.

Greenwood's description (1967): In 1967, one year after the incident, American atmospheric physicist James McDonald interviewed Greenwood. At that time the teacher described a gray, cigar- or finger-shaped object that was roughly two-thirds the length of a Cessna light aircraft and at times seemed to bulge in the middle. He estimated its distance at 450–900 meters. The object hovered, moved slowly, sometimes accelerated and disappeared. Greenwood watched it for at least 25 minutes and heard no sound. After a while the object went behind the row of pine trees about 550 meters away. Greenwood and his colleague Claude Miller then checked the trees but found nothing.

A student's account (1966): In the school publication The Clayton Calendar, an anonymous student wrote about a silvery object the length of a Cessna but very thin. According to the student, it hovered behind the pines, rose, was chased by airplanes, and then glided away. The student and two friends later found an 8–9-meter-diameter patch of grass flattened in a circle.

The press (1966): On April 7, The Age wrote about several hundred students and teachers who watched the object during the morning recess. On April 14, the Dandenong Journal reported a round object with a humped top and a flat bottom, and wrote that some children became ill from fright. On April 21, the paper also published a drawing by student Marilyn Smith (then Eastwood).

The five light aircraft

According to Greenwood, first one airplane approached the object, then four more joined it, and they seemed to be playing a game of cat and mouse with it. On April 21, the Dandenong Journal wrote about them under a headline asking who the five pilots were.

The origin of the aircraft is still unknown. Moorabbin Airport told the paper that about a dozen aircraft took off that morning, including light aircraft doing practice circuits toward the southeast. The air force had no aircraft in the area, and no pilot reported anything unusual. Greenwood, however, was told by the airport that there were no aircraft in the air, which he found strange. Atmospheric physicist F. A. Berson also looked into it: at the airport he was told he would have to contact four different companies if he wanted to track down the five Cessnas.

The Grange and the flattened grass

Members of the Victorian Flying Saucer Research Society (VFSRS) visited the site two days later, on April 8, Good Friday. They found two patches of grass flattened in a circle. According to the society's leader, Judith Magee, this could also have been caused by strong wind, and later visitors could also have trampled the area. The society took photographs, but later found neither the pictures nor the notes.

In letters they wrote to researcher Keith Basterfield in 1990, the witnesses were already describing circles between 6 and 37 meters in diameter, and one of them remembered seven objects.

The silence

Principal Frank Samblebe told the students at assembly that flying saucers do not exist and that they should not talk about the incident. According to Greenwood, the air force visited the school two or three days later, but the principal did not allow an officer to question him during school hours. On May 5, the principal told the Dandenong Journal that he could not comment on something he had not seen, and that phone calls from the public and the air force were disrupting teaching.

Marilyn Smith and Joy Clarke spoke to a Nine television crew and were punished afterward. Decades later, Greenwood said he was threatened with losing his job and with prosecution under the Official Secrets Act if he kept talking. The Nine footage cannot be found in the network's archive.

Several of the students remember that within half an hour men in uniform arrived, others say men in suits, and that some students were questioned separately. There is no contemporary record of this.

Witnesses sixty years later

In April 2026, the ABC program Australian Story spoke with several witnesses:

Tania Vassie (then 13) saw a two-tiered, rounded disc that moved in a zigzag. The men who questioned her suspected a weather balloon, and when she contradicted them, they told her to be quiet. She did not talk about it for almost fifty years.
Ken Stallard, later a school principal himself, remembers a large, round, silvery object. In his view it was probably a secret military program.
Terry Peck ran to the Grange along with others. According to him, the object hovered there, was one and a half times the size of a large car, then suddenly rose and left behind yellowed, twisted grass.
Joy Clarke saw a shiny, metallic, domed object that moved at high speed.
Paul Smith (then 16) was working at a nearby nursery. He saw the object above the power lines, and according to him its color changed and at times it seemed translucent.

Sixty years of research

1967: James McDonald interviews Greenwood and Berson. These notes are the most important early sources on the case.
1990: Keith Basterfield collects witness accounts by letter.
From 2005: Former teacher Shane Ryan systematically tracks down witnesses. He spoke with 142 people who saw the object in the sky and 197 who saw traces on the ground, 77 of whom saw both.
2014: Basterfield proposes the HIBAL balloon explanation.
2025: Grant Lavac launches a petition for an independent investigation. Defence Minister Richard Marles does not respond to it.
2026: On the 60th anniversary, the ABC produces a documentary report. On October 29, journalist Aaron Langmaid urges the release of the records in the Geelong Advertiser, citing the release of the US UAP files.

Layers of the legend

In the 1990s and 2000s, claims also appeared that have no contemporary trace: that the object landed, that soldiers took samples, that a cow died, that a teacher had to hand over his film, and that someone saw beings. These also contradict each other. In 2000, researcher Paul Norman refuted the claim about beings, and in his view the object did not land on school grounds.

According to a local history summary collected by Ryan, a first-year student was so frightened that they were never seen at the school again. No contemporary source confirms this either.

The Balwyn photograph

Four days earlier, on April 2, in Balwyn, another Melbourne suburb, an anonymous resident took a photograph of an object. According to Ryan, the photo was taken by engineer James Kibel, and Ryan himself acknowledges that it could have been an ordinary object.

Where are the records?

An official of the then Department of Supply investigated the incident and wrote a report on it. After his death in 1970, his wife burned his own copy at his request. The fate of the official copy is unknown.
The HIBAL program was also run by this department. According to the National Archives of Australia, the program's file series (MP1472/25) was destroyed by the Department of Defence in 1996, and not even an index remains.
The Royal Australian Air Force (RAAF) also stopped handling UFO reports in 1996.

The explanations

Weather balloon. At 8:30 that day, the weather service launched a balloon with a radar reflector and radiosonde from Laverton, about 35 km away. The Age suspected this as early as the next day. According to Shane Ryan, the wind was blowing in exactly the opposite direction. According to Richard Saunders, chief investigator of the Australian Skeptics, the newspapers' near-surface forecast showed west-southwesterly winds, and higher up the wind could have been blowing in other directions as well. In May 2026, Saunders himself indicated that new, still unverified data could rule out the balloon.

HIBAL balloon. The giant balloons of the HIBAL program measured atmospheric radioactivity. Their roughly 200 kg instrument package was released by a radio signal from an accompanying aircraft, and it descended on a 12-meter parachute in about an hour. It was collected by Department of Supply ground crews. Flight 292 was scheduled for April 5, 1966, and because of strong winds the launch was often delayed by a day. The log of the pilot, who has since died, lists flights 291 and 293, but not 292. According to John Sutcliffe, one of the program's last surviving members, they took care not to come down in the city, and it was almost certainly not a HIBAL balloon.

Towed aerial target. As early as April 28, 1966, a former air force navigator wrote to the Dandenong Journal that it could have been a weather balloon and a target towed for a gunnery exercise. Skeptic author Brian Dunning also proposed this to account for the pursuing airplanes.

Secret military device. According to retired lieutenant colonel and military historian Neil Smith, a device from a secret US program may have strayed off course. According to the ABC, the Jindivik target drone and the U-2 reconnaissance aircraft have been ruled out because their wings and fuselages do not match the descriptions.

Memory. According to Saunders, memory is especially unreliable when it comes to a large group's experiences from decades earlier, and witnesses may also adopt each other's stories.

The sober take

What is certain: On the morning of April 6, 1966, many students and several teachers watched something in the sky for an extended period, and light aircraft were also flying nearby. This is supported both by the contemporary press and by the detailed interview teacher Andrew Greenwood gave one year later. The authorities have never published official investigation findings or an explanation.

How did the accounts change? The contemporary descriptions speak of a gray, thin, cigar-shaped object smaller than a light aircraft. The domed, rounded saucer, the landing, the quickly arriving soldiers and the threats mostly appeared decades later, after the witnesses were tracked down again. This does not mean they are fabrications, but they have no contemporary confirmation.

The flattened grass: there is a contemporary record of this, but the researchers who examined the site themselves thought of wind and trampling.

Strengths and weaknesses of the explanations:

Weather balloon: fits the early descriptions, but does not explain the five airplanes.
HIBAL balloon: would fit well with the parachute descent and the quick recovery, but a member of the program denies it, and the program's records were destroyed.
Secret military device: "explains" every detail, but there is no evidence for it.

Open questions: the identity of the five light aircraft remains the biggest mystery. The most important missing link is the official copy of the Department of Supply report. If it turns up, it could settle many disputes.

What was that?

A bright sphere hanging motionless in the sky? Party and weather balloons mistaken for UFOs