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Date published: September 4, 2019

Volcano Watch — Measuring the mountains: Ground deformation of Hawaii's volcanoes

The ground's surface around the active Hawaiian volcanoes Kīlauea and Mauna Loa is constantly changing. Lava flows laminate their sides during active eruptions.

Date published: July 25, 2019

Volcano Watch - Mauna Loa Volcano's 1935 lava flow seen in current media coverage of Mauna Kea

In ongoing media coverage of demonstrations at the base of Mauna Kea, many hundreds of people can be seen standing on a black lava flow that surrounds the Pu‘uhuluhulu Native Tree...

Date published: July 12, 2019

Volcano Alert Level for Mauna Loa raised to "Advisory"

On July 2, HVO raised the Volcano Alert Level for Mauna Loa from "Normal" to "Advisory".

Date published: July 11, 2019

Volcano Watch - Mauna Loa's 1975 eruption in terms of today's Volcano Alert Level

Shortly before midnight on July 5, 1975, Mauna Loa Volcano awakened with a shudder. Quickly responding to a seismic earthquake/tremor alarm at 11:18 p.m., USGS Hawaiian Volcano Observatory (HVO) staff rushed to their offices, where, at 11:42 p.m., they noted red glow above the mountain. The 1975 eruption lasted less than a day, but it ended Mauna Loa's then longest-known repose period. 

Date published: April 10, 2019

Updates on Kīlauea, Mauna Loa, and HVO's future

HVO Scientist-in-Charge Tina Neal talked about the status of Kīlauea and Mauna Loa volcanoes.

Date published: April 10, 2019

Geologic map of the central-southeast flank of Mauna Loa volcano, Island of Hawaiʻi, Hawaiʻi

Geologic map of the central-southeast flank of Mauna Loa volcano, Island of Hawaiʻi, Hawaiʻi: USGS Scientific Investigations Map 2932–B 

Date published: February 22, 2019

How to stay informed about Hawaiian volcanoes

Information about how to stay informed about Hawaiian volcanoes.

Date published: February 19, 2019

Volcano Awareness Month

January 2019 is Hawaiʻi Island's 10th annual Volcano Awareness Month.

Date published: January 18, 2019

Update on January 2019 Volcano Awareness Month Presentations

Due to the lapse in appropriations, USGS Hawaiian Volcano Observatory scientists are unable to present public lectures as planned.

Date published: January 6, 2019

Update on January 2019 Volcano Awareness Month Presentations

Due to the lapse in appropriations, USGS Hawaiian Volcano Observatory scientists are unable to present lectures as planned. 

Date published: December 21, 2018

We continue to monitor and report on volcanic activity during any lapse in appropriations.

During the current federal government shutdown, the Volcano Hazard Program and all five U.S. Volcano Observatories will continue to issue updates, warnings, and notifications through the usual channels, including websites, email, and social media. 

Date published: October 25, 2018

Volcanic threat assessment helps prioritize risk reduction efforts at U.S. volcanoes

The U.S. Geological Survey assesses active and potentially active volcanoes in the U.S., focusing on history, hazards and the exposure of people, property and infrastructure to harm during an eruption. The findings are in the newly published 2018 Update to the U.S. Geological Survey National Volcanic Threat Assessment.