The M8S algorithm is a new spatially stabilised scheme of the
M8 algorithm application. It accounts for natural
distribution of seismic activity, eliminates subjectivity in positioning the
circles of investigation, CI's, and provides additional stability of predictions.
In Italy the experimental testing aims at prediction of earthquakes in the three
consequent magnitude ranges  M6.5+, M6.0+, and M5.5+  in the CI’s of 192km,
138km, and 106km radius correspondingly. To guarantee unique reproducible
outcome, we update the
catalogue
each halfyear in IEPT&MG RAS, Moscow and DST University of Trieste independently.

The retroactive simulation of forward prediction in 19722001 performed by M8S algorithm justifies starting our realtime experiment: Twelve out of eighteen large earthquakes with magnitudes from 5.5
to 7.0 are predicted by issuing about 3439% of the spacetime volume of alarm.

Since 2002 the M8S algorithm is applied for realtime monitoring of Italian seismicity. The archive of M8S predictions and the list of target events is available. 
Retrospective simulation of prediction, 19722001  
M6.5+  M6.0+  M5.5+ 