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photo:meteors [2019/06/29 07:19]
gary1 [amount of meteors hitting earth:]
photo:meteors [2021/09/22 08:10] (current)
gary1 [near earth objects (NEOs):]
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         * offshore from NW of Western Australia when it was part of Pangaea resulting in the Bedout High underwater crater which is buried beneath thousands of metres of rock (discovered by oil drilling samples). The meteor is estimated to have been at least 10km diameter, leaving an impact crater of 200km diameter.         * offshore from NW of Western Australia when it was part of Pangaea resulting in the Bedout High underwater crater which is buried beneath thousands of metres of rock (discovered by oil drilling samples). The meteor is estimated to have been at least 10km diameter, leaving an impact crater of 200km diameter.
       *an asteroid impact zone in East Warburton Basin in north-eastern South Australia, was caused by an asteroid up to 20km wide impacting **298-360 million years ago**, with impact covering 30,000 sq.km - the 3rd largest impact zone on Earth which occurred at the same time as the Tookoonooka Crater in Eromanga Basin in south-western Queensland as well as a couple of other nearby possible impact zones in this event, and could have been associated with the **Late Devonian mass extinction** ((http://www.abc.net.au/science/articles/2013/02/15/3691311.htm]]))       *an asteroid impact zone in East Warburton Basin in north-eastern South Australia, was caused by an asteroid up to 20km wide impacting **298-360 million years ago**, with impact covering 30,000 sq.km - the 3rd largest impact zone on Earth which occurred at the same time as the Tookoonooka Crater in Eromanga Basin in south-western Queensland as well as a couple of other nearby possible impact zones in this event, and could have been associated with the **Late Devonian mass extinction** ((http://www.abc.net.au/science/articles/2013/02/15/3691311.htm]]))
 +    ***city destructions by impacts**
 +      * Abu Hureyra, Syria at the Younger Dryas Onset c10,800BC (([[https://www.nature.com/articles/s41598-020-60867-w]]))
 +      * ancient Middle Eastern city now called Tall el-Hammam destroyed and the walls of Jericho blown down c1600BC and may have been the **biblical city of Sodom** (([[https://www.nature.com/articles/s41598-021-97778-3]]))
     * there are ~1000 NEA (near earth asteroids) larger than 1km & perhaps a million larger than 50m and max. size is some 25km.      * there are ~1000 NEA (near earth asteroids) larger than 1km & perhaps a million larger than 50m and max. size is some 25km. 
     * there are many more comets than NEA's but as they spend the majority of their orbits well away from the earth, they contribute only ~10% to the census of objects that may strike the earth.      * there are many more comets than NEA's but as they spend the majority of their orbits well away from the earth, they contribute only ~10% to the census of objects that may strike the earth. 
photo/meteors.txt ยท Last modified: 2021/09/22 08:10 by gary1