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A new global network for high-resolution Ha full-disk observations of the sun has been established at the Big Bear Solar Observatory (U.S.A.), the Kanzelhohe Solar Observatory (Austria), and the Yunnan Astronomical Observatory (China). Each of the three stations have a 2K x 2K pixel CCD detector available to monitor the sun with a spatial resolution of 1 arcsec per pixel and a cadence of at least 1 image per minute. We will implement automatic detection routines for flare and filament eruptions. These routines can automatically trigger even higher cadence observations. Having high-cadence data from three observing stations will enable us to accurately track solar rotation rates as determined by local correlation and feature tracking techniques. This includes, e.g., tracking over several days the proper motion of active regions. High-cadence Ha: data with high spatial resolution allow us to study in detail the correlations between coronal mass ejections and the solar surface activity. The new network also represents an important tool for correlative studies between ground-based and space observations, as well as for improving the reliability of current space weather predictions.