Minimal seismic source system (IMAGE) Kyushu University, I2CNER Caption (a) Seismic source system commonly used for imaging and monitoring of subsurface reservoirs. (b) Meter-scale continuous monitoring source system. (c) Centimeter-scale continuous monitoring source system developed in this study. Credit Takeshi Tsuji Usage Restrictions Only for media and non-commercial use. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.