Re: [meteorite-list] GA NC TN AL KY Meteor Approx 2320 EDT // 2220 CDT 02AUG2014
Anne Black via Meteorite-list meteorite-list@meteoritecentral.com writes: But is it? Or is all our modern fancy equipment all for naught? Well, most recently the two Annama meteorites so far found were located primarily based on photographic evidence (i.e. modern fancy equipment) in pretty difficult and remote terrain, precisely within the predicted area for fragments of the sizes found. So hardly naught. As high resolution cameras are getting very affordable now, we should see more successful recoveries. I think it boils down to having enough people to set up and maintain such cameras, and to write better software. This is perfect for citizen science. -- Steinar Midtskogen __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://three.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] GA NC TN AL KY Meteor Approx 2320 EDT // 2220 CDT 02AUG2014
Hi Anne and all, There are many scientifically calculated fall rates. Most assume meteorites that have landed are 100 grams or larger as those are deemed more findable. A Canadian study estimated some 21,000 falls per year. We loose 3/4 in the oceans, leaving some 6,000 to land on dry land. Many of those land in remote areas away from the notice of people. Higher populations usually result in the notice of more falls. Light pollution probably reduces that number some. Of all the falls, only 0.1% or about 5 to 6 falls per year are actually collected. The 1933 year was an excellent year for recovery of falls. 17 meteorites of the potential fall total were recovered! According to this Canadian study we are really no better at recovery of falls than we were in the past. Even though meteorite falls are better understood than in the past. It is important to keep this in mind as there are many unlocated falls all over the world. Source for some of this information: Canadian fireball rates and meteorite falls – declining returns by Martin Beech Campion College, The University of Regina, Regina, Saskatchewan, Canada --AL Mitterling Mitterling Meteorites Quoting Anne Black via Meteorite-list meteorite-list@meteoritecentral.com: I am curious. It is practically everyday that a fireball is spotted somewhere around the globe, but.. - How many of those fireballs are real fireballs, not plane, fireworks, lighting,... etc? - How many of those real ones burn up in the atmosphere? - How many make it to the ground and produce meteorites? - And finally how many of those are ever found soon enough to be called Falls? Is anyone keeping track of those numbers? The percentage meteorites fireballs would be interesting. Anne M. Black www.IMPACTIKA.com impact...@aol.com __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://three.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] GA NC TN AL KY Meteor Approx 2320 EDT // 2220 CDT 02AUG2014
Thank you Al! You are the only one who responded. Yes, of course a lot of meteorites are lost to the oceans, lakes, and to remote areas. And it is interesting that the best year for Falls is 1933. Of course I certainly would not expect the average rate of Falls to change over the years, but with radar, all-sky cameras, computers, fast communications, all the work from Dirk Ross, Rob Matson and several others, and a lot more people looking up, I would expect the percentage of recoveries to go up. But is it? Or is all our modern fancy equipment all for naught? Anne M. Black www.IMPACTIKA.com impact...@aol.com -Original Message- From: almitt2--- via Meteorite-list meteorite-list@meteoritecentral.com To: meteorite-list meteorite-list@meteoritecentral.com Sent: Tue, Aug 5, 2014 7:24 pm Subject: Re: [meteorite-list] GA NC TN AL KY Meteor Approx 2320 EDT // 2220 CDT 02AUG2014 Hi Anne and all, There are many scientifically calculated fall rates. Most assume meteorites that have landed are 100 grams or larger as those are deemed more findable. A Canadian study estimated some 21,000 falls per year. We loose 3/4 in the oceans, leaving some 6,000 to land on dry land. Many of those land in remote areas away from the notice of people. Higher populations usually result in the notice of more falls. Light pollution probably reduces that number some. Of all the falls, only 0.1% or about 5 to 6 falls per year are actually collected. The 1933 year was an excellent year for recovery of falls. 17 meteorites of the potential fall total were recovered! According to this Canadian study we are really no better at recovery of falls than we were in the past. Even though meteorite falls are better understood than in the past. It is important to keep this in mind as there are many unlocated falls all over the world. Source for some of this information: Canadian fireball rates and meteorite falls – declining returns by Martin Beech Campion College, The University of Regina, Regina, Saskatchewan, Canada --AL Mitterling Mitterling Meteorites Quoting Anne Black via Meteorite-list meteorite-list@meteoritecentral.com: I am curious. It is practically everyday that a fireball is spotted somewhere around the globe, but.. - How many of those fireballs are real fireballs, not plane, fireworks, lighting,... etc? - How many of those real ones burn up in the atmosphere? - How many make it to the ground and produce meteorites? - And finally how many of those are ever found soon enough to be called Falls? Is anyone keeping track of those numbers? The percentage meteorites fireballs would be interesting. Anne M. Black www.IMPACTIKA.com impact...@aol.com __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://three.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://three.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] GA NC TN AL KY Meteor Approx 2320 EDT // 2220 CDT 02AUG2014
Hi Anne, Al, and List, The most prolific year for recoveries in the 21st century was 2012. There were 12 recovered falls. Six of those have been approved in the Met Bulletin. Another was approved as a find (Mreira). After that peak in 2012, total recoveries regressed back towards the mean in 2013 with approx. 7 recovered falls and only two of those have been officially approved. Feb 11, 2012 - Xining (L5 chondrite) : China Mar 01, 2012 - Oslo (unofficial) (ordinary chondrite?) : Norway (Hammer) Apr 22, 2012 - Sutter's Mill (CM - Regolith Breccia) : California USA (Hammer) May 04, 2012 - Ladkee (H6 chondrite) : Pakistan May 22, 2012 - Katol (L6 chondrite) : India (Hammer) Jun 03, 2012 - Comayagua (unofficial) (ordinary chondrite?) : Honduras (Hammer) Jul 08, 2012 - Jalangi (unofficial) (ordinary chondrite?) : India Aug 22, 2012 - Battle Mountain (L6 chondrite) : Nevada USA Oct 12, 2012 - Beni Yacoub (unofficial) (ordinary chondrite?) : Morocco Oct 17, 2012 - Novato (L6 chondrite) : California USA (Hammer) Oct 30, 2012 - Addison (unofficial) (ordinary chondrite?) : Alabama USA Dec 16, 2012 - Mreira (L6 chondrite) : Mauritania (fall classified as a find) Best regards and happy huntings, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone - On 8/5/14, Anne Black via Meteorite-list meteorite-list@meteoritecentral.com wrote: Thank you Al! You are the only one who responded. Yes, of course a lot of meteorites are lost to the oceans, lakes, and to remote areas. And it is interesting that the best year for Falls is 1933. Of course I certainly would not expect the average rate of Falls to change over the years, but with radar, all-sky cameras, computers, fast communications, all the work from Dirk Ross, Rob Matson and several others, and a lot more people looking up, I would expect the percentage of recoveries to go up. But is it? Or is all our modern fancy equipment all for naught? Anne M. Black www.IMPACTIKA.com impact...@aol.com -Original Message- From: almitt2--- via Meteorite-list meteorite-list@meteoritecentral.com To: meteorite-list meteorite-list@meteoritecentral.com Sent: Tue, Aug 5, 2014 7:24 pm Subject: Re: [meteorite-list] GA NC TN AL KY Meteor Approx 2320 EDT // 2220 CDT 02AUG2014 Hi Anne and all, There are many scientifically calculated fall rates. Most assume meteorites that have landed are 100 grams or larger as those are deemed more findable. A Canadian study estimated some 21,000 falls per year. We loose 3/4 in the oceans, leaving some 6,000 to land on dry land. Many of those land in remote areas away from the notice of people. Higher populations usually result in the notice of more falls. Light pollution probably reduces that number some. Of all the falls, only 0.1% or about 5 to 6 falls per year are actually collected. The 1933 year was an excellent year for recovery of falls. 17 meteorites of the potential fall total were recovered! According to this Canadian study we are really no better at recovery of falls than we were in the past. Even though meteorite falls are better understood than in the past. It is important to keep this in mind as there are many unlocated falls all over the world. Source for some of this information: Canadian fireball rates and meteorite falls - declining returns by Martin Beech Campion College, The University of Regina, Regina, Saskatchewan, Canada --AL Mitterling Mitterling Meteorites Quoting Anne Black via Meteorite-list meteorite-list@meteoritecentral.com: I am curious. It is practically everyday that a fireball is spotted somewhere around the globe, but.. - How many of those fireballs are real fireballs, not plane, fireworks, lighting,... etc? - How many of those real ones burn up in the atmosphere? - How many make it to the ground and produce meteorites? - And finally how many of those are ever found soon enough to be called Falls? Is anyone keeping track of those numbers? The percentage meteorites fireballs would be interesting. Anne M. Black www.IMPACTIKA.com impact...@aol.com __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://three.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://three.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list
Re: [meteorite-list] GA NC TN AL KY Meteor Approx 2320 EDT // 2220 CDT 02AUG2014
Yes I know Mike, and that is why I asked that question. I just (finally!) updated my calendar and I was stunned by how few confirmed falls I had to add. With almost daily reports of fireballs from Dirk Ross, Marc Fries and Rob Matson studying the radars, and all the cameras I expected a whole lot more of confirmed, and most importantly, recovered meteorites. Anne M. Black www.IMPACTIKA.com impact...@aol.com -Original Message- From: Galactic Stone Ironworks meteoritem...@gmail.com To: Anne Black impact...@aol.com Cc: almitt2 almi...@localnet.com; meteorite-list meteorite-list@meteoritecentral.com Sent: Tue, Aug 5, 2014 8:09 pm Subject: Re: [meteorite-list] GA NC TN AL KY Meteor Approx 2320 EDT // 2220 CDT 02AUG2014 Hi Anne, Al, and List, The most prolific year for recoveries in the 21st century was 2012. There were 12 recovered falls. Six of those have been approved in the Met Bulletin. Another was approved as a find (Mreira). After that peak in 2012, total recoveries regressed back towards the mean in 2013 with approx. 7 recovered falls and only two of those have been officially approved. Feb 11, 2012 - Xining (L5 chondrite) : China Mar 01, 2012 - Oslo (unofficial) (ordinary chondrite?) : Norway (Hammer) Apr 22, 2012 - Sutter's Mill (CM - Regolith Breccia) : California USA (Hammer) May 04, 2012 - Ladkee (H6 chondrite) : Pakistan May 22, 2012 - Katol (L6 chondrite) : India (Hammer) Jun 03, 2012 - Comayagua (unofficial) (ordinary chondrite?) : Honduras (Hammer) Jul 08, 2012 - Jalangi (unofficial) (ordinary chondrite?) : India Aug 22, 2012 - Battle Mountain (L6 chondrite) : Nevada USA Oct 12, 2012 - Beni Yacoub (unofficial) (ordinary chondrite?) : Morocco Oct 17, 2012 - Novato (L6 chondrite) : California USA (Hammer) Oct 30, 2012 - Addison (unofficial) (ordinary chondrite?) : Alabama USA Dec 16, 2012 - Mreira (L6 chondrite) : Mauritania (fall classified as a find) Best regards and happy huntings, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone - On 8/5/14, Anne Black via Meteorite-list meteorite-list@meteoritecentral.com wrote: Thank you Al! You are the only one who responded. Yes, of course a lot of meteorites are lost to the oceans, lakes, and to remote areas. And it is interesting that the best year for Falls is 1933. Of course I certainly would not expect the average rate of Falls to change over the years, but with radar, all-sky cameras, computers, fast communications, all the work from Dirk Ross, Rob Matson and several others, and a lot more people looking up, I would expect the percentage of recoveries to go up. But is it? Or is all our modern fancy equipment all for naught? Anne M. Black www.IMPACTIKA.com impact...@aol.com -Original Message- From: almitt2--- via Meteorite-list meteorite-list@meteoritecentral.com To: meteorite-list meteorite-list@meteoritecentral.com Sent: Tue, Aug 5, 2014 7:24 pm Subject: Re: [meteorite-list] GA NC TN AL KY Meteor Approx 2320 EDT // 2220CDT 02AUG2014 Hi Anne and all, There are many scientifically calculated fall rates. Most assume meteorites that have landed are 100 grams or larger as those are deemed more findable. A Canadian study estimated some 21,000 falls per year. We loose 3/4 in the oceans, leaving some 6,000 to land on dry land. Many of those land in remote areas away from the notice of people. Higher populations usually result in the notice of more falls. Light pollution probably reduces that number some. Of all the falls, only 0.1% or about 5 to 6 falls per year are actually collected. The 1933 year was an excellent year for recovery of falls. 17 meteorites of the potential fall total were recovered! According to this Canadian study we are really no better at recovery of falls than we were in the past. Even though meteorite falls are better understood than in the past. It is important to keep this in mind as there are many unlocated falls all over the world. Source for some of this information: Canadian fireball rates and meteorite falls - declining returns by Martin Beech Campion College, The University of Regina, Regina, Saskatchewan, Canada --AL Mitterling Mitterling Meteorites Quoting Anne Black via Meteorite-list meteorite-list@meteoritecentral.com: I am curious. It is practically everyday that a fireball is spotted somewhere around the globe, but.. - How many of those fireballs are real fireballs, not plane, fireworks, lighting,... etc? - How many of those real ones burn up in the atmosphere? - How many make it to the ground and produce meteorites? - And finally how many of those are ever found soon enough to be called Falls? Is anyone keeping track of those numbers? The percentage meteorites
Re: [meteorite-list] GA NC TN AL KY Meteor Approx 2320 EDT // 2220 CDT 02AUG2014
I am curious. It is practically everyday that a fireball is spotted somewhere around the globe, but.. - How many of those fireballs are real fireballs, not plane, fireworks, lighting,... etc? - How many of those real ones burn up in the atmosphere? - How many make it to the ground and produce meteorites? - And finally how many of those are ever found soon enough to be called Falls? Is anyone keeping track of those numbers? The percentage meteorites fireballs would be interesting. Anne M. Black www.IMPACTIKA.com impact...@aol.com -Original Message- From: drtanuki via Meteorite-list meteorite-list@meteoritecentral.com To: meteorite-list meteorite-list@meteoritecentral.com Sent: Sat, Aug 2, 2014 10:15 pm Subject: [meteorite-list] GA NC TN AL KY Meteor Approx 2320 EDT // 2220 CDT 02AUG2014 List, GA NC TN AL KY Meteor Approx 2320 EDT // 2220 CDT 02AUG2014 http://lunarmeteoritehunters.blogspot.com/2014/08/ga-nc-meteor-02aug2014.html Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://three.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://three.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] GA NC TN AL KY Meteor Approx 2320 EDT // 2220 CDT 02AUG2014
List, GA NC TN AL KY Meteor Approx 2320 EDT // 2220 CDT 02AUG2014 http://lunarmeteoritehunters.blogspot.com/2014/08/ga-nc-meteor-02aug2014.html Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://three.pairlist.net/mailman/listinfo/meteorite-list
