World Seismicity KMZ files


The original source of all the data in the links is the Northern California Earthquake Data Center (NCEDC) and the ANSS Worldwide Catalogue from the Advanced National Seismic System (ANSS). The ability for us to use this data is gratefully acknowledged. All data was collected using the ANSS Catalogue Search page.

The purpose of these KMZ files is to provide a set of data coloured by depth and banded by magnitude with small dot icons to make the maps less cluttered. None of the paired files (explanation later) contain any information about the events as they are designed to be as lightweight as possible. Even so on an older computer, like mine, Google Earth can groan under the strain. You have been advised! The original files do have all the event data.

I divided the world into 4 horizontal layers each of 45 degrees of latitude and 18 vertical sections each of 20 degrees of longitude, giving a total of 72 ‘sections’.

World Seismicity KMZ file mapping image

The numbering starts from Latitude 0°, Longitude 0° and goes upwards in all directions thus all the equatorial segments (0° to 45° and 0° to -45°) bear odd numbers and the polar segments all bear even numbers (45° to 90° and -45° to -90°)

The events used are all Magnitude 5+ events in the ANSS catalogue between 1898 and 2011 inclusive. This means that Magnitude 5 events are best represented from ~1973 onwards but the magnitude 6 should go back much further.

For the seismicity with smaller lighter files each equatorial and polar segment is paired for loading into Google Earth. For example the SE sections 17 and 18 are paired as SE17-18D where the D stands for depth. This results in 36 KMZ files in total covering the world.

When loaded the view is centred on the mid latitude/mid longitude of the region thus for SE17-18D this will be centred on Latitude -45°, Longitude 170°. The altitude setting is 10,000km so it is possible that for some of the less populated regions you may have to zoom in to start seeing dots before your eyes!

Google Earth image of SE17-18D seismicity KMZ as loaded

If you were to load the original components NE17 and NE18 Google earth will not display many of the events, but a little bit of zooming gives you this:

Image of original KMZ files for SE17 and SE18

Zooming in on the Vanuatu area using the original files you can see the mass of dots obliterating the map.

Zoomed image of KMZ file showing Vanuatu region only

I won’t say there is much less obliteration with the smaller dots, but they do make things much easier at medium altitudes.

Zoomed image of KMZ file showing Vanuatu region only with smaller dots

Centred on Port Villa at an altitude of ~860km, using the small dots, the seismicity looks like this:

World seismicity KMZ - Port Villa - Small dots

By comparison here is the original version with the larger dots.

World seismicity KMZ - Port Villa - Originals

The original KMZ files do have the advantage of having the data for each earthquake event, but the disadvantage of size.

So having outlined what these are all about, here are the links to download both the 36 smaller dotted and 72 original KMZ files.

Lighterweight Pairs of seismicity KMZ files
Area Link
Lat 0°to 90°, Lon -180° to -160° NW17-18D.kmz
Lat 0°to 90°, Lon -160° to -140° NW15-16D.kmz
Lat 0°to 90°, Lon -140° to -120° NW13-14D.kmz
Lat 0°to 90°, Lon -120° to -100° NW11-12D.kmz
Lat 0°to 90°, Lon -100° to -80° NW09-10D.kmz
Lat 0°to 90°, Lon -80° to -60° NW07-08D.kmz
Lat 0°to 90°, Lon -60° to -40° NW05-06D.kmz
Lat 0°to 90°, Lon -40° to -20° NW03-04D.kmz
Lat 0°to 90°, Lon -20° to 0° NW01-02D.kmz
Lat 0°to 90°, Lon 0° to 20° NE01-02D.kmz
Lat 0°to 90°, Lon 20° to 40° NE03-04D.kmz
Lat 0°to 90°, Lon 40° to 60° NE05-06D.kmz
Lat 0°to 90°, Lon 60° to 80° NE07-08D.kmz
Lat 0°to 90°, Lon 80° to 100° NE09-10D.kmz
Lat 0°to 90°, Lon 100° to 120° NE11-12D.kmz
Lat 0°to 90°, Lon 120° to 140° NE13-14D.kmz
Lat 0°to 90°, Lon 140° to 160° NE15-16D.kmz
Lat 0°to 90°, Lon 160° to 180° NE17-18D.kmz
Lat 0°to -90°, Lon -180° to -160° SW17-18D.kmz
Lat 0°to -90°, Lon -160° to -140° SW15-16D.kmz
Lat 0°to -90°, Lon -140° to -120° SW13-14D.kmz
Lat 0°to -90°, Lon -120° to -100° SW11-12D.kmz
Lat 0°to -90°, Lon -100° to -80° SW09-10D.kmz
Lat 0°to -90°, Lon -80° to -60° SW07-08D.kmz
Lat 0°to -90°, Lon -60° to -40° SW05-06D.kmz
Lat 0°to -90°, Lon -40° to -20° SW03-04D.kmz
Lat 0°to -90°, Lon -20° to 0° SW01-02D.kmz
Lat 0°to -90°, Lon 0° to 20° SE01-02D.kmz
Lat 0°to -90°, Lon 20° to 40° SE03-04D.kmz
Lat 0°to -90°, Lon 40° to 60° SE05-06D.kmz
Lat 0°to -90°, Lon 60° to 80° SE07-08D.kmz
Lat 0°to -90°, Lon 80° to 100° SE09-10D.kmz
Lat 0°to -90°, Lon 100° to 120° SE11-12D.kmz
Lat 0°to -90°, Lon 120° to 140° SE13-14D.kmz
Lat 0°to -90°, Lon 140° to 160° SE15-16D.kmz
Lat 0°to -90°, Lon 160° to 180° SE17-18D.kmz
Original (Un-Paired) seismicity KMZ files with event data
Area Link
Lat 45°to 90°, Lon -180° to -160° NW18.kmz
Lat 45°to 90°, Lon -160° to -140° NW16.kmz
Lat 45°to 90°, Lon -140° to -120° NW14.kmz
Lat 45°to 90°, Lon -120° to -100° NW12.kmz
Lat 45°to 90°, Lon -100° to -80° NW10.kmz
Lat 45°to 90°, Lon -80° to -60° NW08.kmz
Lat 45°to 90°, Lon -60° to -40° NW06.kmz
Lat 45°to 90°, Lon -40° to -20° NW04.kmz
Lat 45°to 90°, Lon -20° to 0° NW02.kmz
Lat 45°to 90°, Lon 0° to 20° NE02.kmz
Lat 45°to 90°, Lon 20° to 40° NE04.kmz
Lat 45°to 90°, Lon 40° to 60° NE06.kmz
Lat 45°to 90°, Lon 60° to 80° NE08.kmz
Lat 45°to 90°, Lon 80° to 100° NE10.kmz
Lat 45°to 90°, Lon 100° to 120° NE12.kmz
Lat 45°to 90°, Lon 120° to 140° NE14.kmz
Lat 45°to 90°, Lon 140° to 160° NE16.kmz
Lat 45°to 90°, Lon 160° to 180° NE18.kmz
Lat 0°to 45°, Lon -180° to -160° NW17.kmz
Lat 0°to 45°, Lon -160° to -140° NW15.kmz
Lat 0°to 45°, Lon -140° to -120° NW13.kmz
Lat 0°to 45°, Lon -120° to -100° NW11.kmz
Lat 0°to 45°, Lon -100° to -80° NW09.kmz
Lat 0°to 45°, Lon -80° to -60° NW07.kmz
Lat 0°to 45°, Lon -60° to -40° NW05.kmz
Lat 0°to 45°, Lon -40° to -20° NW03.kmz
Lat 0°to 45°, Lon -20° to 0° NW01.kmz
Lat 0°to 45°, Lon 0° to 20° NE01.kmz
Lat 0°to 45°, Lon 20° to 40° NE03.kmz
Lat 0°to 45°, Lon 40° to 60° NE05.kmz
Lat 0°to 45°, Lon 60° to 80° NE07.kmz
Lat 0°to 45°, Lon 80° to 100° NE09.kmz
Lat 0°to 45°, Lon 100° to 120° NE11.kmz
Lat 0°to 45°, Lon 120° to 140° NE13.kmz
Lat 0°to 45°, Lon 140° to 160° NE15.kmz
Lat 0°to 45°, Lon 160° to 180° NE17.kmz
Lat 0°to -45°, Lon -180° to -160° SW17.kmz
Lat 0°to -45°, Lon -160° to -140° SW15.kmz
Lat 0°to -45°, Lon -140° to -120° SW13.kmz
Lat 0°to -45°, Lon -120° to -100° SW11.kmz
Lat 0°to -45°, Lon -100° to -80° SW09.kmz
Lat 0°to -45°, Lon -80° to -60° SW07.kmz
Lat 0°to -45°, Lon -60° to -40° SW05.kmz
Lat 0°to -45°, Lon -40° to -20° SW03.kmz
Lat 0°to -45°, Lon -20° to 0° SW01.kmz
Lat 0°to -45°, Lon 0° to 20° SE01.kmz
Lat 0°to -45°, Lon 20° to 40° SE03.kmz
Lat 0°to -45°, Lon 40° to 60° SE05.kmz
Lat 0°to -45°, Lon 60° to 80° SE07.kmz
Lat 0°to -45°, Lon 80° to 100° SE09.kmz
Lat 0°to -45°, Lon 100° to 120° SE11.kmz
Lat 0°to -45°, Lon 120° to 140° SE13.kmz
Lat 0°to -45°, Lon 140° to 160° SE15.kmz
Lat 0°to -45°, Lon 160° to 180° SE17.kmz
Lat -45°to -90°, Lon -180° to -160° SW18.kmz
Lat -45°to -90°, Lon -160° to -140° SW16.kmz
Lat -45°to -90°, Lon -140° to -120° SW14.kmz
Lat -45°to -90°, Lon -120° to -100° SW12.kmz
Lat -45°to -90°, Lon -100° to -80° SW10.kmz
Lat -45°to -90°, Lon -80° to -60° SW08.kmz
Lat -45°to -90°, Lon -60° to -40° SW06.kmz
Lat -45°to -90°, Lon -40° to -20° SW04.kmz
Lat -45°to -90°, Lon -20° to 0° SW02.kmz
Lat -45°to -90°, Lon 0° to 20° SE02.kmz
Lat -45°to -90°, Lon 20° to 40° SE04.kmz
Lat -45°to -90°, Lon 40° to 60° SE06.kmz
Lat -45°to -90°, Lon 60° to 80° SE08.kmz
Lat -45°to -90°, Lon 80° to 100° SE10.kmz
Lat -45°to -90°, Lon 100° to 120° SE12.kmz
Lat -45°to -90°, Lon 120° to 140° SE14.kmz
Lat -45°to -90°, Lon 140° to 160° SE16.kmz
Lat -45°to -90°, Lon 160° to 180° SE18.kmz
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About PuterMan

A retired programmer.
This entry was posted in Earthquake, KMZ files, Science and technology, Uncategorized, World seismicity and tagged , , , . Bookmark the permalink.

3 Responses to World Seismicity KMZ files

  1. Marco says:

    Great tool! Thanks a lot PuterMan!

  2. adsf says:

    please merge all these

    • PuterMan says:

      It certainly is possible to merge all of these files into one but my experience, at least on my computer, is that having more than two of the very full data files loaded in Google Earth at one time makes it so slow as to be unusable.

      If you care to try loading a few fo the larger ones, and are happy that your system is powerful enough to cope, then let me know and I will begin merging the data into one file. (As an addition to the separate files of course)

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