Today’s family of 5 USGS volcano observatories began with HVO over 111 years ago

HVO staff has grown from one geologist, Thomas A. Jaggar, in 1912 to more than 30 people today. This team includes scientists and specialists in geology, geophysics, geochemistry, field engineering and telemetry, information technology, administration, public communications and more. Hundreds of volunteers, students, and visiting scientists—many from the University of Hawai’i—have also provided valuable assistance to HVO through the years.