Link to USGS home page.
Contact USGS

  • Assess
  • Prepare
  • Forecast
  • |
  • Activity
  • Products
  • Observatories
  • About

ORANGE WATCH, 2017-05-23 19:07:17 UTC

Mauna Loa
YELLOW ADVISORY, 2017-05-18 20:26:21 UTC

Quick Links
Volcano Watch
Kīlauea Videos
Report Felt Earthquake
Vog Dashboard

Hawaiian Volcano Observatory's mission
As a part of the U.S. Geological Survey's Volcano Hazards Program, the Hawaiian Volcano Observatory aims to advance scientific understanding of volcanic processes and lessen the harmful impacts of volcanic activity in the volcanically active areas of Hawaii.

HVO News  (archive)
Active Volcanoes in Hawaii1

Geologic map released for Mauna Loa's northeast flank.
May 01, 2017

On May 1, 2017, authors Trusdell and Lockwood published Geologic map of the northeast flank of Mauna Loa volcano, Island of Hawai‘i, Hawaii. This map refines knowledge of hazards and risks from Earth's largest active volcano. It encompasses the northeast flank of Mauna Loa from the 10,880-ft elevation to sea level, including the towns of Hilo and Volcano. The map shows the distribution of 105 lava flows from more than 30,000 years B.P. to A.D. 1984.

VIDEO: Kīlauea Volcano's summit eruption: 9 years and counting
April 25, 2017

On March 19, 2008, a new volcanic vent opened in Halema‘uma‘u at the summit of Kīlauea. Nine years later, the eruption continues. The vent has grown to a gaping crater that's roughly 195 m by 255 m (about 640 x 840 ft) in size. A lava lake within the vent rises and falls, with spattering on the lake surface sometimes visible from the Jaggar Museum Observation Deck. HVO geologist Matt Patrick recently presented an Hawai‘i Volcanoes National Park "After Dark in the Park" program about this ongoing eruption.

New USGS fact sheet provides information on volcanic air pollution in Hawaii.
April 20, 2017

Volcanic Air Pollution Hazards in Hawaii is an updated fact sheet that provides information on the science of Kīlauea's volcanic air pollution, known as "vog." It also addresses impacts to human health, agriculture, infrastructure, and the environment, and guides readers to relevant resources for living with vog.

Noxious sulfur dioxide gas and other air pollutants emitted from Kīlauea Volcano on the Island of Hawai‘i react with oxygen, atmospheric moisture, and sunlight to produce volcanic smog (vog) and acid rain. U.S. Geological Survey scientists, along with health professionals and local government officials are working together to better understand vog and to enhance public awareness of this hazard.

Very High Threat Potential 1
Mauna Loa
High Threat Potential 1
Moderate Threat Potential 1
Mauna Kea
Not Ranked 1

1. View the threat rankings of US Volcanoes.