Poster of the Alor, Indonesia Earthquake of 11 November 2004 - Magnitude 7.5

Tectonic Summary

The location and focal-mechanism of the earthquake are consistent with it having occurred on the thrust-interface between the Banda Sea micro-plate to the north and the Timor micro-plate to the south. The Banda Sea micro-plate moves south toward, and thrusts beneath, the Timor micro-plate with a velocity of about 30 mm/year. The two micro-plates are sandwiched along with other micro-plates between the larger Sunda, Philippine Sea, Australia, and Pacific plates.

In July 1991, a magnitude 6.9 earthquake struck 20 km to the west and killed 23 people and injured 181.


Thumbnail image of poster.


The posters may be downloaded for viewing or for printing on a color plotter. Adobe PDF (.pdf) format files are provided. Adobe Acrobat 6.0 or higher is required for viewing the PDF file on a computer monitor and for printing the PDF map graphic.

Attention MAC users: If you have problems viewing the pdf files, please download the pdf file and view it in the lastest verion of Adobe Acrobat.