This is a good reference for global seismic hazard.
http://www.seismo.ethz.ch/gshap/

The resolution may not be sufficient, however.  This reference, which 
I haven't seen, is given:
Midzi, V., Hlatywayo, D. J., Chapola, L. S., Kebede, F., Atakan, K., 
Lombe, D. K., Turyomurugyendo, G., & Tugume, F. A., 1999. Seismic 
hazard assessment in Eastern and Southern Africa, Annali di 
Geofisica, GSHAP Special Volume.

John

At 01:00 PM 11/10/2007, you wrote:
>A friend of mine in Tanzania asks
>
> > are you aware of anyone on the web who might "publish" or know
> > of a mechanism that would provide some sort of probability or at least
> > risk assessment of earthquake frequencey and/or magnitude? For example, we
> > know that a road built near Ol Donyo Lengai would be subject to higher
> > risk than a road built in Dar--but is anybody using data to quantify this?
>
>Can anyone provide a reference for this?
>
>Thanks in advance,
>
>Dave
>
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