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GREEN NORMAL, 2019-10-02 20:26:30 UTC

Mauna Loa
YELLOW ADVISORY, 2019-10-10 18:41:54 UTC

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Hawaiian Volcano Observatory's mission
HVO monitors the active volcanoes in Hawaii, assesses their hazards, issues warnings, and advances scientific understanding to reduce impacts of volcanic eruptions.

HVO News  (archive)
Active Volcanoes in Hawaii1

New USGS video: "Water appears in Halema‘uma‘u – Kīlauea Volcano"
October 10, 2019
USGS Hawaiian Volcano Observatory scientists talk about the water at the bottom of Halema‘uma‘u, which first appeared in late July 2019 and continues to rise today. In this 16-minute USGS YouTube video, they address why the water appeared, how it's monitored, and its potential hazards. The video can be viewed here on the USGS YouTube Channel and can be downloaded here from the USGS Multimedia Gallery.
"Earthquakes in Hawaii" updated slide show now online
October 04, 2019
In anticipation of the Great Hawaii ShakeOut, which happens on October 17, 2019, HVO has updated "Earthquakes in Hawaii: What you need to know"—an overview of damaging earthquakes in the Hawaiian Islands and what you can do to protect yourself when the next one strikes. The slide show can be viewed here.

New USGS geonarrative describes Kīlauea Volcano's 2018 events
September 19, 2019
In 2018, Kīlauea experienced its largest lower East Rift Zone eruption and summit collapse in at least 200 years. This new USGS geonarrative provides a brief overview of recent Kīlauea eruptions, highlighting the circumstances leading up to and summarizing the 2018 events. It can be viewed on any device, but on a smart phone, it is best displayed in landscape mode. See the geonarrative here.
Water pond in Halema‘uma‘u
August 21, 2019
HVO geophysicist Jim Kauahikaua discusses the water pond in Halema‘uma‘u and what it means in this 19-minute "Island Conversations" interview recently aired on Hawai‘i radio stations. He also talks about the status of both Kīlauea and Mauna Loa, neither of which is erupting. Listen to the full interview at B93/B97 or Big Island Video News, which includes a transcription.
Earthquakes in Hawai‘i
July 25, 2019
HVO seismologist Brian Shiro discusses similarities and differences between the 2018 Hawai‘i and 2019 California earthquake sequences, and talks about aftershock forecasts, earthquake early warning, and seismic hazards in this 16-minute "Island Conversations" interview that recently aired on Hawai‘i radio stations. A transcript of an excerpt from the interview is available via HPR:  Listen to the full interview here...
Volcano Alert Level for Mauna Loa raised to "Advisory"
July 12, 2019
On July 2, HVO raised the Volcano Alert Level for Mauna Loa from "Normal" to "Advisory" based on increased seismicity and deformation on the volcano. HVO Scientist-in-Charge Tina Neal talked about this change, stressing that a Mauna Loa eruption is not imminent, in this 11-minute "Island Conversations" interview that aired on July 2, 2019. Listen here...
Updated overview of Kīlauea Volcano's 2018 lower East Rift Zone eruption and summit collapse
June 10, 2019
A summary chronology and interesting facts about Kīlauea Volcano's 2018 lower East Rift Zone eruption and summit collapse. See overview here...
New USGS data release has GIS shapefiles for the June 27th lava flow
May 22, 2019
This GIS dataset shows the evolution of the "June 27th" lava flow (episode 61e of the Pu‘u ‘Ō‘ō eruption) that was active from June 27, 2014, to June 8, 2016, and threatened the town of Pāhoa, on the Island of Hawai‘i. The dataset also includes the eruptive fissures, the principle ground cracks that were occupied by lava during emplacement of the June 27th flow, and the lava tube system that developed. Follow the link to download GIS shapefiles for the June 27th lava flow at Kīlauea volcano, Hawai‘i, June 2014–June 2016.
Updates on Kīlauea, Mauna Loa, and HVO's future
April 10, 2019
HVO Scientist-in-Charge Tina Neal talked about the status of Kīlauea and Mauna Loa volcanoes, what was learned (so far) from the 2018 eruption, and the future of HVO in this 30-minute "Island Conversations" interview recorded on March 29. Listen here...
Geologic map of the central-southeast flank of Mauna Loa volcano, Island of Hawaiʻi, Hawaiʻi: USGS Scientific Investigations Map 2932–B
April 10, 2019
This map shows the distribution and relations of volcanic and surficial sedimentary deposits on the southeast flank of Mauna Loa, from 10,350-ft elevation to sea level, separated into 15 age groups. It is the second in a series of five maps that will cover Mauna Loa volcano. The first is posted at
Digital database of the geologic map of the middle east rift geothermal subzone, Kīlauea Volcano, Hawaiʻi: USGS Data Series 1111
April 10, 2019
This database release contains the information used to produce Geologic Investigations Series I-2614, a 2006 paper map that depicts part of the Kīlauea middle East Rift Zone, specifically areas east of Puʻu ʻŌʻō, including some of the 1977 flow field.
The 2018 rift eruption and summit collapse of Kīlauea Volcano
February 22, 2019
In 2018, Kīlauea Volcano experienced its largest lower East Rift Zone (LERZ) eruption and caldera collapse in at least 200 years. Observations and insights from the events are described in this paper, written by the scientists who monitored the activity and published in Science on January 25, 2019. Read paper
Very High Threat Potential 1
Mauna Loa
High Threat Potential 1
Moderate Threat Potential 1
Mauna Kea
Not Ranked 1
Lō‘ihi Seamount

1. View the threat rankings of US Volcanoes.