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World tour of impacts craters


Google Earth

Many years ago my friend Magnus told me about this fantastic program/site. I'm sure that you will have a very exiting day with this program as I did and do, not only for the impacts!

Google Earth is a collection of satellite photos for the whole world and is updated continuously, today is 1% (2005) covered by high resolution photos, and it's really high resolution, about 1m. On the better ones you can even see people (at least the shadow of them) !

Look at your own house and whatever that is interesting to you, I can't tell all about it for you, try it!

This is what you will find and many more!

Images from Google Earth/Map

Australia-Spider

Age: 570 million years

Diameter: 13 kilometer


Where to find Google Earth?

Here is the address to Google Earth:

http://earth. google.com/

Get the free version!


Sweden Dellen crater

Sweden-Dellen

Age: 90 million years

Diameter: 19 kilometer


How to find impact craters?

After I have used it for some hours I was curious to see if it was possibly to see any old impacts. I didn't believe my eye, so many! I thought it was only a hand full of impacts the world around big enough to be seen from satellite, I was wrong!

I have search for impacts the world around from the information I have found, here is a list of links (there are many more):

I have took a couple of impacts and saved the positions with some corrections and put them in a kmz file. If you want a more complete table, go to the links above or search on internet.

When you have installed Goggle Earth and it work properly you can download this file, right-click on the link below and save it somewhere on your computer where you remember it's location.


World tour of impacts file

The file name is impact-world.zip, it's a compressed file, use zip to unpack it.

After you have unpacked the file and got the file impact-world.kmz, double click on it and the Google Earth will start. The file impact-world.kmz will be placed under temporary places (in Google Earth). Mark it or click the individual impacts you want to see, very impressive! It's easy to measure distances in Google Earth so that you can find the diameter of an impact.

It could be wise to unmark other stuff, it's a little bit distracting when a lot of flags popping up everywhere.

note, not all impacts I have choose are for shore from meteorites, they maybe only have this shape!


Chad-Gweni Fada

Age: 345 million years

Diameter: 14 kilometer



Canada-Clear Water Lakes

Age: 290 million years

Diameter: 32 and 30 kilometer


Information about impacts

I have put some figures about the impacts, the diameter and the age. I found a lot of different values for those, specially of the age, I just took one of those. You can expect the meteorite that caused the crater to be 20 to 30 times smaller, i.e. a 30 kilometer wide impact had a 1 kilometer meteorite. It's origin could be fragments of asteroids, some impacts could come from collision with comets. A comet are like a snowball, but it doesn't matter, it's the speed that makes the crater, 36000km/h or more!

When the meteorite enter the atmosphere it will almost always broken up in small pieces (smaller ones can evaporates completely, then it's a meteor) which can be found on the surface as meteorites, if they are spread out enough each will produce a crater.

The original crater that the impact created have for all older eroded away, it takes only a few million years, but you can still today see the structures of it. For longer periods our surface is remade by the plate tectonic drift. The structures you find on the images are for most of them less than 500 million years. The Barringer which is an young one still have the crater left. On the moon which doesn't have any atmosphere or plate tectonic drift the craters are intact after 1000 million of years.

In the Google Earth program you can even do 3-d flights with the terrain-button marked, test it on Barringer (USA)!

I have read in my astronomy book that it will be created a new 50km crater every 10 million years, maybe we will be lucky to get a fresh one to see, if we survive!

If you want to have more information about a specific impact or other things, look at my page of links, Jan-Olov at Naturhistoriska Riksmuseet in Stockholm has provided most of them about impacts.

I will update the file with smaller and not so easy to see impacts in Sweden later, today the resolution of Google Earth is to low for most part of Sweden to see them, but there are a lot of big maybe impacts to see.

Have an interesting day and night!


Terrain map over Stockholm

Are there any meteorite impacts in the neighborhood of Stockholm ?

Overview map over Stockholm, the capital city of Sweden. Those examples are not for sure real meteorite impacts, but it's exciting! If you have a GPS you can use the coordinates from Google map.

Swedish meteorite impacts

Drängsjön

Age: ?

Diameter: 1.5 kilometer

Not likely


Stora Värtan

Age: 540 million years

Diameter: 2 kilometer

Do we really have an impact crater so close that we just can take the subway to it? I don't know but they have put an age to it so maybe.


Björkö

Age: 1210 million years

Diameter: 8 kilometer

There is some activity here, they are drilling very deep holes to get hot water. The waters heat doesn't come from the time of impact, it comes from the cracks (from impact) that let the heat from the inner part of earth to reach close to surface.

This hot water could maybe one day heat the whole city of Stockholm! You can find a lot of information about this project on the internet.


Stensjon

Age: ?

Diameter: 0.5 kilometer


Anderviken

Age: ?

Diameter: 2 kilometer


Meterorit crater Anderviken in Sweden

Anderviken from a visit in 2013.

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