/learn/learning-center/stem-academy/b/blog/posts/high-school-student-builds-low-cost-consumer-friendly-earthquake-detection-deviceVivien He researched, designed, built, and tested the device over the summer. The device was roughly $100. (Photo from Vivien He) When an earthquake occurs, having even just a few seconds of warning can make a big difference. A heads-up gives pe...en-USTelligent Community 12