Observational architectures for enabling earthquake forecasting

Observational architectures for allowing the eventual forecasting of earthquake are discussed. Current science requirements suggest that L-band InSAR systems with short repeat periods would be best suited to such measurements. Constellations of such sensors in orbits around 2000-5000 km altitude might provide optimal Earth coverage for interferometry, while higher orbits around 10,000 - 40,000 km might approach the goal of around-the-clock for disaster-response applications