Streaking fireball, loud blast may have been meteor

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Streaking fireball, loud blast may have been meteor
By Joelle Kovach
First posted: Sunday, May 04, 2014 09:08 PM EDT | Updated: Sunday, May 04, 2014 09:29 PM EDT
PETERBOROUGH, Ont. -- Andrew Vreugdenhil was watching Star Wars with his family at about 4:20 p.m. on Sunday when they heard an earth-shattering boom.
“I thought a tree limb fell on our back room,” he said.
When he went outside to check, he only saw his neighbours walking around their yards, too, looking for the source of the noise.
They heard it and others saw it. According to dozens of reports on social media, people across Southern Ontario saw a fireball streaking east across the sky before it apparently exploded or impacted near Peterborough.
Was it a meteor? Tough to say: no experts were calling it one late Sunday.
The American Meteorological Society’s website reported a sighting of a possible meteor over Peterborough on Sunday. By 6 p.m., the society’s website said meteor status was pending.
“Some people said it was a sonic boom - it sounded like that,” said Peter Dawson, an astronomer and professor of physics at Trent University.
He thinks it was “quite likely” a small meteoroid exploding high in the atmosphere.
“Small” in this case means it probably measures anywhere from half-a-metre to a metre, Dawson said, and exploded with the force of 50 tonnes of TNT.
That’s small as compared to the meteor that exploded over Russia in February 2013, he said.
That one blasted out windows and injured 1,000 people in the Russian city of Chelyabinsk. It exploded with the force of 500,000 tonnes of TNT, Dawson said.
Meteors are “not uncommon,” he added, but most occur over the ocean, where most people can’t see them. Dawson says only 30% of meteors happen overland.
Rodger Forsyth, president of the Peterborough Astronomical Association, said he was at a national telescope and astronomy show in Hamilton, Ont., when the event occurred.
His wife Louise was home in Ennismore, Ont., when it happened and she heard it loud and clear.
“I thought it sounded like a dump truck’s box coming down without its hydraulics - it was a loud bang,” she said.
It amused her that her husband was away shopping for telescopes when a meteor showed up at home. She says it was kind of wasted on her.
“I’m not even the least bit interested in astronomy.”
Streaking fireball, loud blast may have been meteor | Ontario | News | Toronto S
Possible meteor sighting over GTA skies
05/04/2014 05:55 PM Toronto Staff
GTA residents took to social media Sunday after reportedly hearing a loud bang and seeing a flaming object streak across the sky.
A person in Oakville reported seeing the object around 4:15 p.m. Sunday.
Others spotted something as far east as Whitby and as far north as Newmarket.
Peterborough police have received several calls describing some type of explosion and houses shaking in the aftermath.
The American Meteor Society lists 22 reports, ranging from New York and New Jersey to St. Catherines and Caledon, of a fire ball spotted.
Click here for the American Meteor Society website.
Peter Brown, a professor at the University of Western Ontario who studies meteors and meteorites, says the widespread eyewitness reports and images are consistent with a meteor.
There is no official word on what the item was or when, and where, it may have touched down.
Most of the equipment the university has to track meteors was not in operation Sunday afternoon, but a series of microphones the university has in place did detect a shockwave, Brown said.
Based on the data and the eyewitness reports it appears the shockwave occurred in the area of Peterborough and its characteristics allowed for an estimate of the size of the meteor, said Brown.
”The energy is somewhere in the order of a few tens of tons of TNT explosive equivalent,” he said in an interview Sunday night. “That would translate into something on the order of half to one metre in diameter and that’s going to be a mass of ….a few metric tons.”
It’s possible some fragments hit the ground, Brown added.
”This clearly was a pretty massive event, lots of mass, so on that basis alone I think we have a pretty good chance that meteorites would make it to the ground,” he said.
The odds of fragments hitting the ground depend on how fast the meteor was travelling — a relatively slow moving fireball would make it more likely that some meteorites may be found.
“It would not surprise me if meteorites are found,” Brown said.
The annual Eta Aquarids meteor shower is expected to peak this week. There is no official word if Sunday’s sighting is part of that annual shower.
The meteors seen in the Eta Aquarids shower are pieces of Halley’s Comet that separated hundreds of years ago.
Did you see something? Tell us in the comments.
Possible meteor sighting over GTA skies | CityNews
Possible meteor sighting over the GTA
May 4, 2014
GTA residents took to social media Sunday after reportedly hearing a loud bang and seeing a flaming object streak across the sky.
Possible meteor sighting over the GTA | CityNews
Meteor seen in Woodbridge - YouTube
 

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Ontario meteoroid was size of large beachball: Expert
Sarah Deeth, QMI Agency
First posted: Monday, May 05, 2014 06:40 PM EDT | Updated: Monday, May 05, 2014 06:44 PM EDT
PETERBOROUGH, Ont. - Experts believe the meteoroid seen streaking through the sky Sunday was about the size of a large beach ball and with enough energy equal to 50 tons of TNT.
Peter Brown, a professor in the University of Western Ontario’s department of physics and astronomy and part of the meteor physics group, confirmed that the big boom and bright fireball seen in the sky Sunday afternoon was, in fact, a meteoroid.
Brown said the event was caught on several dashboard cameras, and air waves and radar data collected by his team are all on par with meteoroid activity.
Brown believes the meteoroid, coming into the atmosphere at a rate of anywhere from 11 to 73 km per second, first appeared in the sky south of Peterborough.
Following its path, Brown thinks it may have landed somewhere in the Quinte West-Stirling area.
But that’s if it survived.
Graham Wilson, a consulting geologist based in Campbellford, Ont., said it’s possible the meteoroid splintered into dust particles well before it touched Earth’s surface.
Wilson will be involved in the hunt for Sunday’s space rock, but cautioned that he has to first determine if the meteoroid has become a meteorite.
Most people mistake meteors for meteorites, Wilson explained.
A meteor is often referred to as a shooting star. That, Wilson said, is just a speck of dust, often no larger than a pebble, burning up in the sky.
They are small but give off fantastic amounts of energy when they burn up 150 km above Earth’s surface, he said.
A meteoroid is something falling through the atmosphere toward Earth. It becomes a meteorite when it lands and can be the size of a pea to something weighing several tons.
Assuming that something has hit Earth, the meteorite would be a charred-black colour, weigh more than a normal rock and likely have a magnetic pull to it.
The inside of a meteorite looks a lot like grey cement with flecks of shiny metal throughout, Wilson explained.
They aren’t hot. Wilson said the meteoroid’s temperature plummets as it falls. It also slows dramatically, dropping to speeds of about 100 km/h.
Ownership of the meteorite depends on where it lands, Wilson said.
If it’s on Crown land, anyone can claim it. If it’s in a national or provincial park it’ll belong to the federal or provincial government, and if it lands on private property then the owner of that land claims it.
Once a meteorite is found it has to be classified and named. It will also be appraised to determine its worth.
Anyone who believes they may have found pieces of the meteorite can call Wilson at 807-620-5506.
The American Meteor Society pegged the Peterborough fireball as happening at 4:16 p.m. Sunday “with a brightness rivalling the sun.”
The Society estimates the starting point of the meteor to be around the Warkworth area of Northumberland County, ending around the Stirling area of Quinte West.
The estimated trajectory of the Peterborough fireball, according to reports sent to the American Meteor Society. AMERICAN METEOR SOCIETY MAP

Meteor Toronto Sunday May 4, 2014 - caught on dashcam - YouTube
Ontario meteoroid was size of large beachball: Expert | Ontario | News | Toronto
Fireball spotted over Ontario and New York
A fireball bright enough to be seen clearly in daylight was spotted over Southern Ontario and New York on May 4, caused by a meteor.
May 5, 2014 17:27
From Straight Talk
Fireball spotted over Ontario and New York : Featured TOR : Videos
Meteor spotted in southern Ontario was the size of a small car
05/05/2014 02:14 PM Erin Criger
A meteor spotted over southern Ontario on Sunday was the size of a small car, the American Meteor Society told CityNews.
“It was a daytime fireball, which is a meteor that occurs during the daytime and rivals the brightness of the sun,” AMS operations manager Mike Hankey told CityNews on Monday.
It was only able to be seen because of its large size, Hankey said.
The meteor “caused some sonic booms, which is an indicator that it penetrated deep into the atmosphere, and it’s also an indication that it was very big.”
It likely terminated just south of Belleville-Quinte West. Click here to see a map of the meteor’s trajectory.
On average, approximately 80 per cent of the meteor would have burned up in the Earth’s atmosphere. The pieces that remained will likely range in size from dust to a man’s fist.
The larger pieces, though rare, do pose a danger.
“If it hit a house it would probably punch through the roof,” Hankey said.
People who live in the area were quick to contact the AMS, with Hankey saying they had received 84 reports of this meteor in the past 24 hours.
Hankey is asking anyone who saw anything to report it online, or by using the AMS app.
Is it related to the annual Eta Aquarids meteor shower, which is expected to peak this week?
This event was most likely not related to that, Hankey said.
“There’s a lot of meteor showers throughout the year. Fireballs like this aren’t necessarily associated with meteor showers.”
How do you know if you’ve found a meteorite? Check out the following seven tips, courtesy of NASA.
1. Metal
Most meteorites contain at least some metal. Do you see the metal shining on a broken surface? If so, you might have a meteorite.
2. Density
Those meteorites that do have a lot of metal tend to be very dense compared to regular rocks. Do you have something very dense such that it could be a meteorite? But remember that not all meteorites are dense.
3. Magnetic Properties
A lot of meteorites contain shiny iron-nickel metal grains or consist largely of iron-nickel metal. The iron in the metal attracts a magnet. Is a magnet attracted to the surface of your sample? If so, you might have a meteorite. But remember that a lot of normal rocks on the Earth are also magnetic. So, just because something is magnetic, it doesn’t mean that it is a meteorite.
4. Chondrules
Some primitive meteorites have little round pieces of stony material in them. These little round pieces are called chondrules. Some sedimentary and volcanic rocks can have spherical particles that look somewhat like chondrules. Does your sample contain chondrules? If it does, you might have a meteorite.
5. Fusion crust
When a meteorite is falling through the atmosphere, it begins to heat up because of the extreme compression of the atmosphere. The meteor gets so hot that the outer surface begins to melt, which produces a thin black/brown coating on the surface of the rock called a fusion crust.
Iron meteorites may show evidence of melted metal on their surface, but this is less common. Fusion crusts are present on freshly fallen meteorites, but the crusts are fragile and can weather away from samples that fell a long time ago.
Small patches of fusion crust can sometimes remain in hollows of the sample. Does your sample have a fusion crust? If so, you have a meteorite.
6. Regmaglypt texture/thumbprints
When the surface of the meteorite begins to melt during entry into the atmosphere, some areas of the meteorites are eroded by the melting more than others, almost like someone is taking little scoops of material out. This leaves a bunch of small dents in the surface of the rock, making it look like someone put thumbprints into clay.
The surface of most meteorite samples have these thumbprints called “regmaglypts,” which can vary in size from less than a centimeter up to as much as 10 centimeters. Does your sample have Regmaglypt texture/thumbprints? If so, you have a meteorite.
7. Streak
Most meteorites won’t leave a streak, but the surfaces of some meteorites might leave a reddish streak if they have been oxidized (rusted). If you drag your sample across this “streak plate,” and it leaves a red/orange line, then the sample is probably a common mineral on the Earth called hematite.
If the sample is magnetic and leaves a black or gray streak, then it might be the common terrestrial iron-oxide mineral called magnetite. Does your sample cause a streak on a “streak plate?” If not, you may have a meteorite.
My Edited Video - YouTube
Meteor spotted in southern Ontario was the size of a small car | CityNews
Sunday meteor was brighter than the sun: expert
May 5, 2014
A meteor spotted over southern Ontario on Sunday was the size of a small car and brighter than the sun, Mike Hankey, operations manager, American Meteor Society told CityNews.
Sunday meteor was brighter than the sun: expert | CityNews
Meteorite sighted in Peterborough
May 5, 2014
A ground search for meteorites was underway in Peterborough after a flash of light was seen by some over the skies on Sunday afternoon.
Meteorite sighted in Peterborough | CityNews
 
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