Design of earthquake early warning system based OMRON D7S vibrate sensor

Indonesia is a country that is very prone to earthquake. This disaster can have a very large impact from main destruction of ground motion and secondary destruction from building rupture. By providing early warning system, secondary disasters caused by the earthquake, such as fire due to gas leakage, electric shock or loss of important personal data, can be prevented. This research designs an early warning system against earthquakes, where the sensor used was 3d accelerometer-based OMRON D7S vibration sensor. A warning is also sent to personnel or web-server via GSM communication. The system calibrated with a standard tool MEISEI G401 owned by Indonesian Earthquake Agency (BMKG). Test showed that early warning system have accuracy value of 74.32%. From the testing that has been done, the time delay in sending data is greatly influenced by the state of the surrounding environment. Data is sent and stored to an SQL-based database, with an average delivery delay of 1.7 seconds. This system successfully provides an early warning using the buzzer alarm as desired. The percentage of success of the buzzer turns on as desired is 100%.