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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

Frequently Asked Questions about KILAUEA Summit Subsidence
July 31, 2018
At present, the summit of Kīlauea Volcano is undergoing dramatic changes. The caldera floor is subsiding. The rim and walls of Halema‘uma‘u are slumping inward. Nearby residents feel moderate-sized earthquakes, and see small ash plumes rise from the crater. We've compiled some Frequently Asked Questions that address the reasons behind the current activity summit activity and what might happen over the next several months. Read more.
15 July 2018 - Preliminary analysis of the Kīlauea lower East Rift Zone eruption: Fissure 8 prognosis and ongoing hazards
July 19, 2018
Reviews Kīlauea Volcano's ongoing lower East Rift Zone eruption, focusing on the fissure 8 vent, channel, and ocean entry, and describing a credible set of future scenarios and uncertainties, as guide for managing hazards and risks. Read more
Littoral hydrovolcanic explosions: a case study of lava—seawater interction at Kīlauea Volcano
July 18, 2018
A variety of hydrovolcanic explosions may occur as basaltic lava flows into the ocean. Read more
29 June 2018 - Volcanic Hazard at the Summit of Kīlauea Update
July 05, 2018
A guide for understanding current activity and hazards at and around the summit of Kīlauea Volcano, summarizing activity from late April through June 29, 2018, and possible future outcomes. Read more
Timeline of Kīlauea Summit and Lower East Rift Zone (LERZ) events April 17 to present
July 01, 2018
Summary timeline of Kīlauea events, updated each week. Timeline of events 2018

Frequently Asked Questions about Kīlauea Volcano's summit earthquakes.
June 28, 2018
These FAQs will help answer some of the most commonly asked questions about the nature of Kīlauea's summit activity and the numerous earthquakes occurring in the area.

29 March 2017—Preliminary Analysis of Hazards at the Kamokuna Ocean Entry
June 27, 2018
Since the onset of the Pu‘u ‘Ō‘ō eruption in January 1983, lava has entered the Pacific Ocean about half the time (as of March 2017). This "Cooperator Report to the U.S. Coast Guard" addresses hazards associated with the Kamokuna ocean entry, active July 2016—November 2017, on Kīlauea's south flank. Read more
Why so many earthquakes in the Kīlauea summit area?
May 29, 2018
Deflation at Kīlauea's summit has caused up to 1.5 meters (about 5 feet) of subsidence, which has stressed the faults around and within Kīlauea Caldera. Read more
Ground- and space-based monitoring reveal where magma has moved under Kīlauea Volcano
May 24, 2018
An explanation of magma movement from Kīlauea's summit through the volcano's East Rift Zone and to the eruption site(s) in lower Puna. Read more
Facts on the stability of Kīlauea's south flank, past and present.
May 14, 2018
Addresses speculative stories, rumors and blogs about the stability of the south flank of Kīlauea and the potential for a catastrophic collapse that could generate a Pacific-wide tsunami. Read more
Initial summary of explosion hazards at the summit of Kīlauea Volcano
May 11, 2018
The addresses possible and potential impacts of future explosive events at Kīlauea's summit. Accompanies the May 9, 2018 community meeting presentation.
New Hawai'i Interagency Vog Information Dashboard (from IVHHN)
May 11, 2018
The International Volcanic Health Hazard Network (IVHHN) has a new resource for the current eruptive activity and associated hazards at Kīlauea Volcano's lower East Rift Zone and summit. Find it at
Eruption in Leilani Estates subdivision, Kīlauea Volcano
May 03, 2018
The intrusion of molten rock into the lower East Rift Zone of Kīlauea Volcano reached the surface in the late afternoon on May 3 in a part of Leilani Estates. A fissure about 150 m (492 ft) long erupted mostly spatter and intermittent bubble bursts for about 2 hours. Lava did not travel more than a few m (yards) from the fissure. Hawaii County Civil Defense is coordinating needed response including evacuation of a portion of the Leilani subdivision. USGS Hawaiian Volcano Observatory deployed geologists to the eruption site overnight, and other scientists are monitoring various data streams telemetered to the observatory 24/7. Check the Kīlauea webpages for new information (updates, photos, maps). Updates will be sent out as new information is gathered and as new outbreaks of lava occur.
How you can stay informed about recent Kīlauea Volcano activity
May 02, 2018
The USGS Volcano Notification Service (VNS) is a free service that sends automatic notices (emails or texts) about volcanic activity at U.S. monitored volcanoes, including Hawaiian volcanoes. You can sign up to receive these notifications at

Through VNS, the Hawaiian Volcano Observatory issues:
  • daily Kīlauea eruption updates,
  • weekly Mauna Loa updates,
  • monthly updates for Hualālai, Haleakalā, and Mauna Kea,
  • Status Reports about volcanic activity during ongoing events,
  • Volcano Activity Notices if/when significant events or changes in volcanic activity or alert levels occur, and
  • Information Statements to provide additional information or explanations of non-volcanic events on an "as needed" basis.

You can choose the types of notifications that you wish to receive—all of them or just some of them. You can also select the volcanoes you want to hear about—you can choose Hawai‘i only, or volcanoes in other states as well.

For more information about these types of notifications, please see:

The Civil Defense Emergency Notification System is a free service that allows you to receive timely notifications about emergency situations in the County of Hawai‘i. Civil Defense encourages residents and visitors to sign up so that they can be notified in case of an emergency. Standard charges for incoming calls and text messages apply. Sign up at:

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.