Survey, drilling and soil sampling work is underway on Mauna Loa Road in Hawaiʻi Volcanoes National Park as the initial step ...

Geologic mapping has been one of the most fundamental mandates of the U.S. Geological Survey (USGS) since its establishment ...

COURTESY USGS This map shows the location of a 4.8 magnitude earthquake on Hawaii island early Tuesday morning. A magnitude 4.8 earthquake shook the southeastern flank of Mauna Loa volcano on Hawaii ...