Collecting geophysics data at Pinnacles National Park
Research Hydrologist Paul Hsieh collects seismic data during a groundwater study at Pinnacles National Park in California. The red seismometer on the ground measures ambient seismic noise, which includes microtremors induced by wind, ocean waves, and human activity. The seismic data collected can be used to estimate unconsolidated sediment thickness, map the bedrock surface, and infer fault locations.
Dr. Hsieh is a Scientist Emeritus in the USGS Water Resources Mission Area Earth System Processes Division.