GEOwarning is a compact, ultra low-cost digital accelerograph.  It integrates 3 axes MEMS accelerometer, 20bit digitizer, embedded linux OS and GPS or NTP  timing. Seedlink and Earthworm servers ensure reliable real time data telemetry while large storage volume ensures a long period of local data recording. The instrument has very low power consumption so it can operate powered from a small 12Vdc battery. Due to its small size and its flexibility of communication (Ethernet or WiFi) and timing (GPS or NTP), it can be easily installed at buildings and other structures.  The device supports a software configurable, variable range of +/-2g, +/-4g, +/-8g  presenting an ideal solution for a wide range of structural monitoring and early warning applications. Minimum data latency along with the calculation of an earthquake’s Cumulative Absolute Velocity (CAV) guarantee that the user can be immediately alerted just at the beginning of the event. Compact design is a competitive advantage and this is reflected in the price which is only a small fraction of the typical commercial accelerograph’s cost. The user is now able to deploy even five times more units for the same budget.