I have created this Earthquake Early Warning and Monitoring System using open-source technologies. Here, I have used pressure sensor to replicate the Earthquake effect. The harder I press it, higher the value, lighter I press, lower the value. The most important aspect was to get data and send the data continuously in real-time. That's where I have used PubNub, which claims that it can send data anywhere in the world in 0.25 seconds! Yes, they have that kind of servers and infrastructure. Finally, I am using Freeboard to create the dashboard.

To understand how this works, we have to understand how Earthquake happens. You can find out more about it here. This project was initially built in Ruby language, but I have built JavaScript version of it too, which is faster.

To give an idea of how fast this system is, in recent Nepal Earthquake, it would have given 3-5 min early warning to Kathmandu and surrounding cities as epicenter was only 70-140 Km away from them.