During lava fountaining episodes, strong volcanic tremor — a signal associated with fluid movement — is recorded on seismic ...

Geologic mapping has been one of the most fundamental mandates of the U.S. Geological Survey (USGS) since its establishment in 1879. Congress created the USGS to “classify the public lands and examine ...

Last month, the Hawai‘i County Civil Defense Agency, Hawai‘i Volcanoes National Park, and the U.S. Geological Survey Hawaiian Volcano Observatory adopted the Island of Hawai‘i Interagency Operations ...

LUCENA CITY – Taal Volcano’s sulfur dioxide (SO₂) emissions slightly increased even as its seismic activity remained generally quiet, the Philippine Institute of Volcanology and Seismology (Phivolcs) ...

MANILA, Philippines — Mayon Volcano in Albay remains under Alert Level 3 which signifies intensified unrest as it had 24 ...