Unified Interior Regions

Hawaii

The Pacific Region has nine USGS Science Centers in California, Nevada, and Hawaii. The Regional Office, headquartered in Sacramento, provides Center oversight and support, facilitates internal and external collaborations, and works to further USGS strategic science directions.

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Filter Total Items: 68
Date published: August 10, 2020
Status: Completed

Sea-Level Rise and Climate Change Impacts to Reefs

Learn how the USGS studies sea-level rise and climate change impacts to coral reefs.

Date published: February 13, 2020
Status: Active

Avian Malaria Genomic Research Project

Habitat destruction, invasive plants, non-native predators and competitors, and introduced diseases have decimated the diverse, endemic native forest bird community of Hawai‘i. In particular, avian malaria (Plasmodium relictum), which is transmitted by the introduced Culex quinquefasciatus mosquito, has caused dramatic declines and extinctions in many native birds. Fortunately, Cx....

Date published: December 19, 2019
Status: Completed

U.S. Seismic Hazard Maps – Hawaii

Seismic hazard maps for Hawaii.

Date published: November 8, 2019
Status: Active

Modeling invasion risk and impacts to inform management responses - Helen Sofaer

Where are invasive species likely to be introduced or become abundant? How should managers respond? On Hawaii and other Pacific Islands numerous invasive species have altered ecosystems, and new species continue to be introduced. Statistical analyses can characterize risk and inform response strategies.

Date published: November 8, 2019
Status: Active

Modeling invasion risk and impacts to inform management responses - Helen Sofaer

Where are invasive species likely to be introduced or become abundant? How should managers respond? On Hawaii and other Pacific Islands numerous invasive species have altered ecosystems, and new species continue to be introduced. Statistical analyses can characterize risk and inform response strategies.

Date published: October 28, 2019
Status: Completed

Update of the Hawaii Seismic Hazard Model Workshop #1

Wednesday, September 18, 2019
Honolulu, HI
University of Hawaii at Manoa

Date published: September 10, 2019
Status: Completed

Circulation and Sediment, Nutrient, Contaminant, and Larval Dynamics on Reefs

The overall objective of this research effort is to better understand how circulation and sediment processes impact coral reefs.

Date published: June 26, 2019
Status: Active

Information by Region-Hawaii

  

Date published: March 28, 2019
Status: Active

Sea Level and Storm Hazards: Past and Present

Sea level and Storm Hazards: Past and Present is a multidisciplinary study of past changes in sea level. Prehistoric shorelines can be used as a baseline for current and future sea level changes under warmer-than-present climate. Emphasis is placed on looking at sea levels during warm periods of the last 500,000 years as well as how base level changes increase the risk of coastal inundation...

Date published: February 19, 2019
Status: Active

Risk Analysis of Invasive Freshwater Fishes in Hawaii and Micronesia

Invasive species threaten biodiversity around the world, especially on islands. USGS scientists are helping to identify fish species that have the greatest potential to invade the fresh waters of Microneisa. 

Date published: November 29, 2018
Status: Active

Webinar: Assessing the Impact of Future Climate and Introduced Species on Hawaiʻi's Aquatic Ecosystems

View this webinar to learn how a warming climate will have fundamental impacts on freshwater, a critical driver of tropical island ecosystems.

Contacts: Yin-Phan Tsang, Hannah Clilverd
Date published: November 5, 2018
Status: Completed

Coral Reef Facts

These facts about coral reefs are presented in conjunction with the USGS Coral Reef Project.

Filter Total Items: 89
Date published: February 14, 2019

Coral cover and health determined from seafloor photographs and diver observations, West Hawai'i, 2010-2011

The data described here were collected as part of a larger study to examine habitat conditions and coral health with respect to exposure to submarine groundwater discharge (SGD) and urban land uses.

Date published: January 1, 2019

Radiocarbon data from coastal wetlands on the Hawaiian islands of Kaua'i, O'ahu, and Hawai'i

This portion of the data release presents radiocarbon age data from 66 samples collected from Anahola Valley (Kaua'i), Kahana Valley (O'ahu), and Pololu Valley (Hawai'i). Sample ages were determined by the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility. The data are provided in a comma-delimited spreadsheet (.csv).

Date published: January 1, 2019

Near-shore seawater-column estimates of groundwater advection rate, Makua, Kauai, USA, August 2016

In-situ near-shore seawater measurements of dissolved radon, conductivity, and water level were used to determine the advection rate of groundwater onto the fringing reef off Makua, HI, USA.

Date published: January 1, 2019

Coral bleaching data by site, West Hawaii, 2010-2011

Observations of bleached coral were documented by scuba divers along pre-determined transects and are presented here in comma-separated format. Included in the table are coral species observed, colony size, size of bleached area on colony, and seawater temperature.

Date published: January 1, 2019

Seafloor photographs and location data, West Hawaii, 2010-2011

Seafloor photographs were collected by SCUBA divers along pre-determined transects using an underwater digital camera following benthic survey protocols developed by the National Park Service (NPS) at Kaloko-Honokohau National Historical Park (Marrack and others, 2014; Weijerman and others, 2014) and modeled after the U.S. Geological Survey (USGS) and NPS coral reef survey proto

Date published: January 1, 2019

Projected flooding extents and depths based on 10-, 50-, 100-, and 500-year wave-energy return periods, with and without coral reefs, for the States of Hawaii and Florida, the Territories of Guam, American Samoa, Puerto Rico, and the U.S. Virgin Islands,

This data release provides flooding extent polygons (flood masks) and depth values (flood points) based on wave-driven total water levels for 22 locations within the States of Hawaii and Florida, the Territories of Guam, American Samoa, Puerto Rico, and the U.S. Virgin Islands, and the Commonwealth of the Northern Mariana Islands. For each of the 22 locations there are eight ass

Date published: January 1, 2019

Dynamically downscaled future wave projections from SWAN model results for the main Hawaiian Islands

Projected wave climate trends from WAVEWATCH3 model output were used as input for nearshore wave models (for example, SWAN) for the main Hawaiian Islands to derive data and statistical measures (mean and top 5 percent values) of wave height, wave period, and wave direction for the recent past (1996-2005) and future projections (2026-2045 and 2085-2100).
Three-hourly global

Date published: January 1, 2019

Conductivity, temperature, and depth (CTD) data from nearshore coral reef locations along the west coast of Hawaii Island (2010-2014)

Conductivity-Temperature-Depth (CTD) profile data were collected along transects across study areas of west and east Hawaii Island between 2010 and 2014. Measurements were made over a range of tide and weather conditions and help characterize the spatial extent and variability in estuarine conditions across the reef when grouped by 1 to 2-hour survey period or by season. Sites of cold and war...

Date published: January 1, 2019

Water temperature time-series data from nearshore coral reef and anchialine pool locations along the west coast of Hawaii Island (2010-2013)

Time-series data of water temperature were collected at 33 locations along the west coast of the Island of Hawaii, including within Kaloko-Honokohau National Historical Park (KAHO), and Puu o Honaunau National Historical Park (PUHO) between 2010 and 2013 in nearshore coral reef and anchialine pool settings. Temperature sensors were attached to fossil limestone, rock or dead coral wi

Date published: January 1, 2019

Water level, temperature, and salinity time-series data from nearshore coral reef locations along the west coast of Hawaii Island (2010-2011)

Time-series data of water level, water temperature, and salinity were collected at 10 locations along west Hawaii Island between 2010 and 2011 in nearshore coral reef settings. Conductivity-temperature-depth sensors were attached to fossil limestone, rock, or dead coral within otherwise healthy coral reef settings spanning water depths of 8 to 23 ft. Continuous measurements were made ever

Date published: January 1, 2019

Sediment grain-size distributions of three carbonate sand layers in Anahola Valley, Kaua'i, Hawai'i

This portion of the data release presents sediment grain-size data from samples collected from Anahola Valley, Kaua`i, Hawai`i in November, 2015 (USGS Field Activity 2015-671-FA). 63 sand and mud samples were taken from sediment cores that were collected using a ‘Russian’ corer (a hand-held, side-filling peat auger) from two site locations. Site locations were

Date published: January 1, 2019

Projected flood extent polygons and flood depth points based on 10-, 50-, 100-, and 500-year wave-energy return periods, with and without coral reefs, for the State of Hawaii (the islands of Hawaii, Kahoolawe, Kauai, Lanai, Maui, Molokai, Niihau, and Oahu

This part of the data release presents projected flooding extent polygon (flood masks) and flooding depth points (flood points) shapefiles based on wave-driven total water levels for the State of Hawaii (the islands of Hawaii, Kahoolawe, Kauai, Lanai, Maui, Molokai, Niihau, and Oahu). For each island there are 8 associated flood mask and flood depth shapefiles: one for

Filter Total Items: 375
Preliminary thermal map of the 2018 eruptive fissures along Kīlauea Volcano's lower East Rift Zone
May 24, 2021

A thermal map of Kīlauea Volcano's 2018 lower East Rift Zone fissures and steaming area.

Digital elevation model of crater and lava lake
May 18, 2021

HVO uses regular Kīlauea summit helicopter overflights of Halema‘uma‘u crater to create digital elevation models (DEMs) of the crater.

May 13, 2021—Kīlauea summit eruption thermal map constructed from aerial imagery
May 14, 2021

May 13, 2021—Kīlauea summit eruption thermal map constructed from aerial imagery

A compilation of nine thermal maps created for the ongoing eruption in Halema‘uma‘u, at the summit of Kīlauea.
May 14, 2021

A compilation of nine thermal maps created for the ongoing eruption in Halema‘uma‘u, at the summit of Kīlauea, showing the evolution of the lava lake.

Color map of lava lake at volcano summit
May 7, 2021

May 7, 2021—Kīlauea summit eruption contour map showing lava lake level and elevations of features within the caldera

As the lava lake in Halema‘uma‘u crater continues to rise, the surface area of the lake increases
April 29, 2021

Digital elevation models (DEMs) created from photos taken during helicopter overflights of Kīlauea summit.

The digital elevation models (DEMs) created from photos taken during helicopter overflights of the Kīlauea summit have many uses
April 29, 2021

Digital elevation models (DEMs) created from photos taken during helicopter overflights of Kīlauea summit.

Color map of lava
April 26, 2021

April 23, 2021—Kīlauea summit eruption contour map showing lava lake level and elevations of features within the caldera

Color map of lava lake temperature
April 20, 2021

April 16, 2021—Kīlauea summit eruption thermal map constructed from aerial imagery

Color map of lava flow response times
April 16, 2021

March 10, 2021—Mauna Loa eruption response times over the past 200 years

Color interferogram of volcano summit
April 8, 2021

This image of the summit of Mauna Loa Volcano is derived from satellite-based interferometric synthetic aperture radar (InSAR) and is called an interferogram. 

Color map of lava lake at volcano summit
April 6, 2021

April 5, 2021—Kīlauea summit eruption contour map showing lava lake level and elevations of features within the caldera

Filter Total Items: 121
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Year Published: 2019

Coral skeleton δ15N as a tracer of historic nutrient loading to a coral reef in Maui, Hawaii

Excess nutrient loading to nearshore environments has been linked to declining water quality and ecosystem health. Macro-algal blooms, eutrophication, and reduction in coral cover have been observed in West Maui, Hawaii, and linked to nutrient inputs from coastal submarine groundwater seeps. Here, we present a forty-year record of nitrogen...

Murray, Joseph; Prouty, Nancy G.; Peek, Sara E.; Paytan, Adina

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Year Published: 2019

Stream sediment geochemistry of four small drainages on the north shore of Kauai west of Hanalei

Geochemical compositions of fine-grained stream sediment from four drainages on the north shore of the island of Kauai, Hawaii, west of Hanalei and two back-beach sites were explored to increase understanding about land-based runoff and ecological risk from runoff to nearshore coral communities. Stream and beach sediment were collected between...

Takesue, Renee K.; Storlazzi, Curt D.
Takesue, R.K., and Storlazzi, C.D., 2018, Stream sediment geochemistry of four small drainages on the north shore of Kauai west of Hanalei: U.S. Geological Survey Open-File Report 2019–1007, 11 p., https://doi.org/10.3133/ofr20191007.

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Year Published: 2018

Honolulu Magnetic Observatory

Tucked in a grove of thorny mesquite trees, on an ancient coral reef on the south side of the Hawaiian island of Oahu, west of Pearl Harbor, a small unmanned observatory quietly records the Earth’s time-varying magnetic field. The Honolulu Magnetic Observatory is 1 of 14 that the U.S. Geological Survey Geomag­netism Program operates at various...

Love, Jeffrey J.; Finn, Carol
Love, J.J., and Finn, C.A., 2018, Honolulu Magnetic Observatory: U.S. Geological Survey Fact Sheet 2018–3029, 2 p.

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Year Published: 2018

Groundwater-level, groundwater-temperature, and barometric-pressure data, July 2017 to February 2018, Hālawa Area, Oʻahu, Hawaiʻi

The Red Hill Bulk Fuel Storage Facility, operated by the U.S. Navy and located in the Hālawa area, Oʻahu, Hawaiʻi, includes 20 underground storage tanks that can hold a total of 250 million gallons of fuel. In January 2014, the U.S. Navy notified the Hawaiʻi Department of Health and U.S. Environmental Protection Agency of release of an estimated...

Mitchell, Jackson N.; Oki, Delwyn S.
Mitchell, J.N., and Oki, D.S., 2018, Groundwater-level, groundwater-temperature, and barometric-pressure data, July 2017 to February 2018, Hālawa Area, O‘ahu, Hawai‘i: U.S. Geological Survey Open-File Report 2018–1147, 35 p., https://doi.org/10.3133/ofr20181147.

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Year Published: 2018

Volcanic aquifers of Hawai‘i—Hydrogeology, water budgets, and conceptual models

Hawai‘i’s aquifers have limited capacity to store fresh groundwater because each island is small and surrounded by saltwater. Saltwater also underlies much of the fresh groundwater. Fresh groundwater resources are, therefore, particularly vulnerable to human activity, short-term climate cycles, and long-term climate change. Availability of fresh...

Izuka, Scot K.; Engott, John A.; Rotzoll, Kolja; Bassiouni, Maoya; Johnson, Adam G.; Miller, Lisa D.; Mair, Alan
Izuka, S.K., Engott, J.A., Rotzoll, Kolja, Bassiouni, Maoya, Johnson, A.G., Miller, L.D., and Mair, Alan, 2018, Volcanic aquifers of Hawai‘i—Hydrogeology, water budgets, and conceptual models (ver. 2.0, March 2018): U.S. Geological Survey Scientific Investigations Report 2015-5164, 158 p., https://doi.org/10.3133/sir20155164.

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Year Published: 2018

Spatially distributed groundwater recharge estimated using a water-budget model for the Island of Maui, Hawai`i, 1978–2007

Demand for freshwater on the Island of Maui is expected to grow. To evaluate the availability of fresh groundwater, estimates of groundwater recharge are needed. A water-budget model with a daily computation interval was developed and used to estimate the spatial distribution of recharge on Maui for average climate conditions (1978–2007 rainfall...

Johnson, Adam G.; Engott, John A.; Bassiouni, Maoya; Rotzoll, Kolja
Johnson, A.G., Engott, J.A., Bassiouni, Maoya, and Rotzoll, Kolja, 2018, Spatially distributed groundwater recharge estimated using a water-budget model for the Island of Maui, Hawai`i, 1978–2007 (ver. 2.0, February 2018): U.S. Geological Survey Scientific Investigations Report 2014–5168, 53 p., https://doi.org/10.3133/sir20145168.

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Year Published: 2017

Rigorously valuing the role of coral reefs in coastal protection: An example from Maui, Hawaii, U.S.A.

The degradation of coastal habitats, particularly coral reefs, raises risks by exposing communities to flooding hazards. The protective services of these natural defenses are not assessed in the same rigorous, economic terms as artificial defenses such as seawalls, and therefore often not considered in decision-making. Here we present a new...

Storlazzi, Curt D.; Reguero, Borja G.; Lowe, Erik; Shope, James B.; Gibbs, Ann E.; Beck, Mike; Nickel, Barry A.
Storlazzi, C.D., Reguero, B., Lowe, E., Shope, J.B., Gibbs, A.E., Beck, M.W., and Nickel, B., 2017. “Rigorously valuing the role of coral reefs in coastal protection: An example from Maui, Hawaii, U.S.A.” Coastal Dynamics 2017, p. 665-674.

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Year Published: 2017

Measuring surface-water loss in Honouliuli Stream near the ‘Ewa Shaft, O‘ahu, Hawai‘i

The Honolulu Board of Water Supply is currently concerned with the possibility of bacteria in the pumped water of the ‘Ewa Shaft (State well 3-2202-21). Groundwater from the ‘Ewa Shaft could potentially be used to meet future potable water needs in the ‘Ewa area on the island of O‘ahu. The source of the bacteria in the pumped water is unknown,...

Rosa, Sarah N.
Rosa, S.N., 2017, Measuring surface-water loss in Honouliuli Stream near the ‘Ewa Shaft, O‘ahu, Hawai‘i: U.S. Geological Survey Scientific Investigations Report 2017–5042, 14 p., https://doi.org/10.3133/sir20175042.

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Year Published: 2017

Pufferfish mortality associated with novel polar marine toxins in Hawaii

Fish die-offs are important signals in tropical marine ecosystems. In 2010, a mass mortality of pufferfish in Hawaii (USA) was dominated by Arothron hispidus showing aberrant neurological behaviors. Using pathology, toxinology, and field surveys, we implicated a series of novel, polar, marine toxins as a likely cause of this mass mortality. Our...

Work, Thierry M.; Moeller, Perer D. R.; Beauchesne, Kevin R.; Dagenais, Julie; Breeden, Renee; Rameyer, Robert; Walsh, Willliam A.; Abecassis, Melanie; Kobayashi, Donald R.; Conway, Carla M.; Winton, James

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Year Published: 2017

Spatially distributed groundwater recharge for 2010 land cover estimated using a water-budget model for the Island of O‘ahu, Hawai‘i

Owing mainly to projected population growth, demand for freshwater on the Island of Oʻahu is expected to increase by about 26 percent between 2010 and 2030, according to the City and County of Honolulu. Estimates of groundwater recharge are needed to evaluate the availability of fresh groundwater. For this study, a water-budget model with a daily...

Engott, John A.; Johnson, Adam G.; Bassiouni, Maoya; Izuka, Scot K.; Rotzoll, Kolja
Engott, J.A., Johnson, A.G., Bassiouni, Maoya, Izuka, S.K., and Rotzoll, Kolja, 2017, Spatially distributed groundwater recharge for 2010 land cover estimated using a water-budget model for the Island of O‘ahu, Hawai‘i (ver. 2.0, December 2017): U.S. Geological Survey Scientific Investigations Report 2015–5010, 49 p., https://doi.org/10.3133/sir20155010.

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Year Published: 2016

Panel regressions to estimate low-flow response to rainfall variability in ungaged basins

Multicollinearity and omitted-variable bias are major limitations to developing multiple linear regression models to estimate streamflow characteristics in ungaged areas and varying rainfall conditions. Panel regression is used to overcome limitations of traditional regression methods, and obtain reliable model coefficients, in particular to...

Bassiouni, Maoya; Vogel, Richard M.; Archfield, Stacey A.

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Year Published: 2016

Low-flow characteristics for streams on the Islands of Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi

Statistical models were developed to estimate natural streamflow under low-flow conditions for streams with existing streamflow data at measurement sites on the Islands of Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi. Streamflow statistics used to describe the low-flow characteristics are flow-duration discharges that are equaled or exceeded between...

Cheng, Chui Ling
Cheng, C.L., 2016, Low-flow characteristics for streams on the Islands of Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi: U.S. Geological Survey Scientific Investigations Report 2016-5103, 36 p., http://dx.doi.org/10.3133/sir20165103.

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Nighttime color photograph of lava fountains erupting within a spatter cone
October 12, 2021

Kīlauea summit eruption - October 12, 2021

A view of the fountaining at the west vent in Halema‘uma‘u crater, at the summit of Kīlauea. The photo was taken from the west rim, looking down upon the vent. Low fountaining and roiling within the cone supplied lava to the lake via a narrow spillway. Lava spreading out into the lake develops a zig-zag pattern in the surface crust. USGS photo by M. Patrick taken on

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Low-light photograph of a lava lake with bright lava fountains erupting from the vent in the west crater wall
October 12, 2021

Kīlauea summit eruption - October 12, 2021

A wide view of the ongoing eruption at Kīlauea summit, from the south rim of Halema‘uma‘u. A vent on the western crater wall (left) continues to supply lava to the active west half of the lava lake. The west side of the lake is perched above the stagnant eastern (right) lake surface, with several lava overflows advancing over the previously solidified surface crust. USGS

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Telephoto color image of lava fountains within a spatter cone
October 12, 2021

Kīlauea summit eruption - October 12, 2021

Associated with an increase in fountaining activity at the main western vent in Halema‘uma‘u, a short-lived vent opened just to the north (right). Activity at this vent lasted about 10 hours with low-level fountaining about 3 meters (10 ft) high. Large fountaining bursts from the main vent threw lava above the height of the cone (30 meters or 100 ft), depositing spatter on

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Low-light telephoto color image of lava fountains supplying lava into lava lake
October 12, 2021

Kīlauea summit eruption - October 12, 2021

Lava fountains from the western vent within Halema‘uma‘u continue to supply lava into the lava lake through a short spillway. Consistent fountain heights of 10–15 meters (30–50 ft) were interrupted by frequent larger busts of spatter exceeding the height of the cone (30 m or 100 ft). USGS photo taken by B. Carr on October 12, 2021.

October 12, 2021

Lava fountaining in Halema'uma'u crater—October 12, 2021

Lava continues to erupt from the western vent in Halema‘uma‘u. On October 12, a short-lived vent (erupting for approximately 10 hours) was present to the north of the main vent (right). Lava fountaining from the main vent was 10–15 meters (30–50 ft) above the lake surface, with larger bursts exceeding the height of the cone (30 meters or 100 ft). Fountaining at the smaller

October 12, 2021

Kīlauea summit eruption—October 12, 2021

The eruption continues within Halema‘uma‘u crater, at the summit of Kīlauea. The western vent supplies lava into the lava lake through a short spillway. Consistent fountain heights of 10–15 meters (30–50 ft) were interrupted by frequent larger busts of spatter exceeding the height of the cone (30 m or 100 ft). 

Color photograph of volcanic vent
October 11, 2021

October 11, 2021 — Kīlauea

This zoomed-in view of the western fissure within Halema‘uma‘u, at the summit of Kīlauea, was captured on October 11, 2021, through the lens of a laser rangefinder. A prominent horseshoe-shaped spatter cone, measured to be standing 28 m (92 ft) above the adjacent lava lake, surrounds a roiling lava pond which also hosts taller fountains at times. HVO scientists observed

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Color photograph of lava flow
October 11, 2021

October 11, 2021 — Kīlauea

This zoomed-in view of the northwest side of the main island within the Halema‘uma‘u lava lake shows a "rootless lava flow" (silver) that formed in the early stages of the eruption on September 29, 2021. A rootless lava flow is one that has no physical linkage with its source eruptive vent, because the flow is fed by molten spatter falling onto a solidified surface. In

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Color photograph of lava lake
October 10, 2021

October 10, 2021 — Kīlauea, Halema‘uma‘u lava lake at dusk

Lava fountaining activity continues from the western vent in Halema‘uma‘u, within Kīlauea summit caldera, viewed at dusk on October 10, 2021, from the west rim of the crater. Only the western half of the lake surface is active; the eastern half is covered by a cooling, solidified crust. USGS image by B. Carr.

October 10, 2021

October 10, 2021—Kīlauea, fountaining at west vent of Halema'uma'u

Kīlauea summit eruption lava fountain height in Halema‘uma‘u crater on October 10, 2021 was highly variable. A persistent low fountain a few meters (yards) tall was frequently interrupted by larger series of bursts throwing lava more than 15 meters (50 feet) into the air and onto the interior walls of the vent cone. 

Color photograph of volcanic vent
October 10, 2021

October 10, 2021 — Kīlauea, lava fountaining in Halema‘uma‘u

Fountaining at the western vent in Halema‘uma‘u crater, at Kīlauea volcano's summit, was approximately 15 meters (50 feet) high on the evening of October 10, 2021. Spatter from the fountaining would occasionally land on the wall of the vent cone and cool (visible on the right). Lava exited the pond within the cone and entered the lake through a gap on the eastern side of

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Color photograph of volcanic vent
October 9, 2021

October 9, 2021 — Kīlauea, summit eruptive vent

HVO scientists captured this zoomed-in photo of the western fissure within Halema‘uma‘u through the lens of a laser rangefinder on October 9, 2021. The fissure has formed a horseshoe-shaped spatter cone around its source, with an opening on the east (right) side allowing lava to flow into the active lava lake. The spatter cone was measured to be standing 30 m (98 ft) tall

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A wide view of the lava lake in Halema‘uma‘u crater, at the summit of Kīlauea, taken from the western crater rim
October 5, 2021

A new eruption at Kīlauea's summit began at approximately 3:20 p.m. HST on September 29, 2021. Lava activity is currently confined within Halema'uma'u crater. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

USGS science for a changing world
October 4, 2021

The USGS Hawaiian Volcano Observatory (HVO) is lowering Kīlauea’s volcano alert level to WATCH and its aviation color code to ORANGE, reflecting the less-hazardous nature of the ongoing eruption within Halemaʻumaʻu crater, in Kīlauea’s summit caldera and Hawai‘i Volcanoes National Park.

A telephoto view of the lava fountain in the western wall of Halema‘uma‘u crater during Kīlauea's ongoing summit eruption
October 4, 2021

A new eruption at Kīlauea's summit began at approximately 3:20 p.m. HST on September 29, 2021. Lava activity is currently confined within Halema'uma'u crater. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

Wide view of the ongoing eruption within Halema'uma'u crater
October 3, 2021

A new eruption at Kīlauea's summit began at approximately 3:20 p.m. HST on September 29, 2021. Lava activity is currently confined within Halema'uma'u crater. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

Color photograph of active lava lake
October 2, 2021

A new eruption at Kīlauea's summit began at approximately 3:20 p.m. HST on September 29, 2021. Lava activity is currently confined within Halema'uma'u crater. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

Kīlauea summit eruption in Halemaʻumaʻu crater - October 1, 2021
October 1, 2021

A new eruption at Kīlauea's summit began at approximately 3:20 p.m. HST on September 29, 2021. Lava activity is currently confined within Halema'uma'u crater. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

Color photograph of eruption
September 30, 2021

Kīlauea volcano is erupting again. Wednesday afternoon, lava returned to Kīlauea's summit within Hawaiʻi Volcanoes National Park after a 4-month hiatus.  A new line of fissures sliced through the solidified crust of the 2020–21 lava lake in Halemaʻumaʻu at 3:21 p.m. HST.  

Color photograph of scientist collecting sample
September 30, 2021

Kīlauea volcano began erupting on September 29, 2021, at approximately 3:20 p.m. HST in Halema‘uma‘u crater. Webcam images show new fissures opened on the December 2020-May 2021 inactive lava lake surface. The USGS Hawaiian Volcano Observatory raised the Volcano Alert Level for ground-based hazards from ADVISORY to WARNING and the Aviation Color Code from YELLOW to RED. 

A telephoto image of one of the low lava fountains near the center of the growing Halema'uma'u lava lake
September 30, 2021

A new eruption at Kīlauea's summit began at approximately 3:20 p.m. HST on September 29, 2021. Lava activity is currently confined to Halema'uma'u crater within Hawai‘i Volcanoes National Park. Gas emissions in the summit region are elevated.

With the summit eruption continuing through the night, HVO scientists monitor the eruption for changes in volcanic hazards
September 30, 2021

A new eruption at Kīlauea's summit began at approximately 3:20 p.m. HST on September 29, 2021. Lava activity is currently confined within Halema'uma'u crater. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

At approximately 3:20 p.m. HST on September 29, 2021, the USGS Hawaiian Volcano Observatory (HVO) detected glow in Kīlauea summi
September 29, 2021

A new eruption at Kīlauea's summit began at approximately 3:20 p.m. HST on September 29, 2021. Lava activity is currently confined within Halema'uma'u crater. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

USGS science for a changing world
September 29, 2021

HVO Kilauea RED/WARNING - ORANGE/WATCH status change to RED/WARNING.Kīlauea is erupting. Eruption has commenced within Halemaʻumaʻu crater in Kīlauea’s summit caldera.

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