| Seismograms can record lots of things, and record many little waves, called microseisms. |
| Scientists believed that microseisms are generated when the large ocean waves of hurricanes interfere or strike a coastline. |
| The phase velocities of microseisms recorded with an array of eight instruments are measured in four different locations. |
| The microseisms are located and the data is used to create maps of the hydraulic fracture geometry. |
| GeoOptics listens to these microseisms through subsurface geophones and a system of hardware and software that collects and analyzes downhole activity. |
| Collectively, these ocean microseisms have an annual cumulative seismic energy comparable to that generated from earthquakes, said Kedar. |
