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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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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.

News

Date published: September 27, 2021

Photo and Video Chronology – Kīlauea – September 27, 2021

HVO field crews—equipped with specialized safety gear—conduct station maintenance, collect water samples, and monitor for new changes from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

Date published: September 23, 2021

Volcano Watch — Observations and impacts of the 2017–2018 Ambae, Vanuatu eruption

The Pacific is home to dozens of active volcanic systems including the massive Hawaiian shield volcanoes Kīlauea and Mauna Loa. Most basaltic shield volcanoes in the Pacific are related to the hotspots that created the Hawaiian Islands and many of the Polynesian and Micronesian island chains.

Date published: September 16, 2021

Volcano Watch — How does HVO determine which regions are most threatened by lava flows?

Most residents of the Island of Hawaiʻi live on one of four potentially active volcanoes and probably have wondered about the threat of lava flows at one time or another. Interestingly, determining future threats relies on knowledge of the past. The long-term likelihood of an area being invaded by lava in the future, is estimated in two different ways based on the history of lava flow activity...

Filter Total Items: 67
Date published: September 7, 2021
Status: Active

Coral Reef Project

Explore the fascinating undersea world of coral reefs. Learn how we map, monitor, and model coral reefs so we can better understand, protect, and preserve our Nation's reefs.

Date published: September 7, 2021
Status: Active

The Value of U.S. Coral Reefs for Risk Reduction

Summary of the report, “Rigorously valuing the role of U.S. coral reefs in coastal hazard risk reduction”

    Contacts: Curt Storlazzi, PhD, Michael Beck
    Date published: August 26, 2021
    Status: Active

    Coral Reef Project: Kauaʻi

    As part of the USGS Coral Reef Project, the USGS is working on the island of Kauaʻi to identify circulation patterns and a sediment budget for Hanalei Bay to help determine any effects to the coastal marine ecosystem.

    Date published: June 10, 2021
    Status: Active

    Coral Reef Project: Maui

    As part of USGS Coral Reef Project studies, the USGS has been heavily involved in efforts to improve the health and resilience of Maui's coral reef system, bringing expertise in mapping, circulation and sediment studies, and seismic surveys.

    Date published: May 24, 2021
    Status: Active

    Low-lying areas of tropical Pacific islands

    Sea level is rising faster than projected in the western Pacific, so understanding how wave-driven coastal flooding will affect inhabited, low-lying islands—most notably, the familiar ring-shaped atolls—as well as the low-elevation areas of high islands in the Pacific Ocean, is critical for decision-makers in protecting infrastructure or relocating resources and people.

    Date published: May 13, 2021
    Status: Active

    Pacific Island Bird Survey Design and Data Analysis

    Abundance data are collected for bird populations throughout the Pacific Islands by numerous federal, state, university, and non-profit organizations. In order to ensure data are standardized and available to researchers throughout the region, interagency bird databases have been created and continue to be used. These databases contain more than a million compiled, proofed, and standardized...

    Date published: April 15, 2021
    Status: Active

    Coral Reef Project: Oʻahu

    As part of the Coral Reef Project, the USGS is working closely with other local groups to investigate poor water quality issues in Maunalua Bay on the southeast coast of Oʻahu.

    Date published: April 15, 2021
    Status: Active

    Coral Reef Project: Hawaiʻi

    As part of the USGS Coral Reef Project, the USGS is working on the Kona (west) coast of Hawaiʻi to evaluate geologic resources at two historical parks.

    Date published: April 15, 2021
    Status: Active

    Coral Reef Project: Kahoʻolawe

    As part of the USGS Coral Reef Project, the USGS is trying to better understand how nearshore processes impact the deeper, scattered coral reef communities of Kahoʻolawe.

    Date published: April 15, 2021
    Status: Active

    Coral Reef Project: Molokaʻi

    As part of the USGS Coral Reef Project, recent USGS work on Molokaʻi includes looking into the coral record to find clues to past sedimentation events.

    Date published: December 11, 2020
    Status: Completed

    Update of the Hawaii Seismic Hazard Model Workshop #2

    Wednesday, November 18, 2019
    Virtual Meeting

    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.

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    Date published: June 8, 2021

    Coral geochemistry time series from Kahekili, west Maui

    Geochemical analysis (including stable boron, boron:calcium ratio, and carbon and oxygen isotopes) were measured from coral cores collected in July 2013 from the shallow reef at Kahekili in Kaanapali, west Maui, Hawaii from scleractinian Porites lobata.

    Date published: March 26, 2021

    Cross-reef wave and water level data from coral reef environments

    Direct field observations of wave dynamics across coral reefs and the resulting water levels are limited. Here we provide direct in situ measurements of waves and water levels across a number of coral reefs, extending from the fore reef, across the reef crest, and to the shoreline. These measurements are provided to help better understand the evolution of waves across coral reefs and...

    Date published: April 22, 2020

    Avian Malaria Warning System

    Data for this warning system is a compilation of NOAA NCDC Global Historical Climatology Network data, Dark Sky API 2-week forecast data, and calculated historical annual climatic averages based on the NOAA NCDC data. All data has been statistically adjusted for each individual site location based on collected site data. 

    Date published: September 26, 2019

    Kīlauea 2018 - lower East Rift Zone eruption and summit-collapse events

    This geonarrative summarizes Kīlauea’s 2018 events, highlighting the historical context and contributions to science.

    Date published: September 23, 2019

    Data from Bristle-Thighed Curlews at James Campbell National Wildlife Refuge, O'ahu, Hawaii, 2012-2014

    This data package includes two tables of data for Bristle-thighed curlews (Numenius tahitiensis) captured 2012-2014 on the James Campbell National Wildlife Refuge O'ahu, Hawaii (21.68 N, 157.95 W). One table provides capture, banding, morphology, and genetic data. The second table provides mark-resight data for estimating the size of the wintering population on Oahu in April of 2014.

    Date published: September 5, 2019

    Measurements Used to Determine the Sex of Bristle-thighed Curlews (Numenius tahitiensis)

    This data set contains bill and tarsal measurements from 114 Bristle-thighed Curlews, captured on breeding grounds in Alaska, and non-breeding areas in Hawaii and Reitoru atoll, French Polynesia.

    Date published: September 2, 2019

    Observations of coral reef oceanographic and groundwater properties off Makua, Kauai, HI, USA, August 2016

    This data release includes measurements of circulation and waves, profiles of seawater properties, and profiles of resistivity on the shoreline, which can be used to assess the potential for terrestrial groundwater intrusion on the reef and the sources and fate of these water masses. The recent discovery of coral Black Band Disease at Mākua Reef on Kauaʻi, Hawaiʻi prompted an investigation...

    Date published: August 29, 2019

    Waiakane, Molokai, HI, 2018 Coral Reef Circulation and Sediment Dynamics Experiment

    To better constrain the influence of sea-level rise on waves and sediment transport over a fringing coral reef flat, an experiment was conducted across a large fringing reef off the south shore of Molokai, Hawai’i. Here we provide data on water levels, waves, currents observed during this field effort. Additional data sets will be added as they become available.

    Date published: August 26, 2019

    Bristle-Thighed Curlew (Numenius tahitiensis) Mark-Resight Encounter History from the James Campbell National Wildlife Refuge and Surrounding Area, Oahu, Hawaii, 2012-2017

    This data set contains one table with mark-resight observations of Bristle-thighed Curlews marked on Oahu, Hawaii, with plastic color leg flags, 2012-2017.

    Date published: March 21, 2019

    Core logs, scans, photographs, grain size, and radiocarbon data from coastal wetlands on the Hawaiian islands of Kauaʻi, Oʻahu, and Hawaiʻi

    This data release supports a study that reports on efforts to estimate future tsunami inundation through stratigraphic analyses of potential tsunami deposits beneath present and former Hawaiian wetlands, coastal lagoons, and river floodplains.

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    Map of volcano summit
    August 30, 2021

     

    Summary map of intrusive activity at Kīlauea Volcano―August 23–30, 2021

    A helicopter overflight on June 8, 2021, allowed for aerial visual and thermal imagery collection of Halema‘uma‘u
    June 10, 2021

    June 08, 2021—Kīlauea summit thermal map constructed from aerial imagery

    Color map of lava lake at volcano summit
    May 28, 2021

     

    May 28, 2021—Kīlauea summit contour map showing lava lake level and topographic profiles across the caldera

    Rise of the Halema‘uma‘u Lava Lake—May 13, 2021
    May 28, 2021

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

    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

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    Year Published: 2021

    Rebounds, regresses, and recovery: A 15-year study of the coral reef community at Pila‘a, Kaua‘i after decades of natural and anthropogenic stress events

    Pila‘a reef on the north shore of Kaua‘i, Hawai‘i was subjected to a major flood event in 2001 that deposited extensive sediment on the reef flat, resulting in high coral mortality. To document potential recovery, this study replicated benthic and sediment surveys conducted immediately following the event and 15 years later. Coral cores were...

    Rodgers, Ku'ulei S.; Richards Dona, A.; Stender, Y. O.; Tsang, A. O.; Han, J. H. J.; Weible, Rebecca; Prouty, Nancy G.; Storlazzi, Curt D.; Graham, Andrew M.

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    Year Published: 2021

    Nearshore water quality and coral health indicators along the west coast of the Island of Hawaiʻi, 2010–2014

    Coral reefs worldwide are experiencing rapid degradation in response to climate and land-use change, namely effects of warming sea-surface temperatures, contaminant runoff, and overfishing. Extensive coral bleaching caused by the steady rise of sea-surface temperatures is projected to increase, but our understanding and ability to predict where...

    Grossman, Eric E.; Marrack, Lisa; vanArendonk, Nathan R.
    Grossman, E.E., Marrack, L., and vanArendonk, N.R., 2021, Nearshore water quality and coral health indicators along the west coast of the Island of Hawaiʻi, 2010–2014: U.S. Geological Survey Open-File Report 2020–1128, 45 p., https://doi.org/10.3133/ofr20201128.

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    Year Published: 2020

    Seismic and geodetic progression of the 2018 summit caldera collapse of Kīlauea Volcano

    The 2018 eruption of Kīlauea volcano, Hawaiʻi, resulted in a major collapse of the summit caldera along with an effusive eruption in the lower East Rift Zone. The caldera collapse comprised 62 highly similar collapse cycles of strong ground deformation and earthquake swarms that ended with a magnitude 5 collapse event and one partial cycle that...

    Tepp, Gabrielle; Hotovec-Ellis, Alicia J.; Shiro, Brian; Johanson, Ingrid; Thelen, Weston; Haney, Matthew M.

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    Year Published: 2020

    Sedimentary evidence of prehistoric distant-source tsunamis in the Hawaiian Islands

    Over the past 200 years of written records, the Hawaiian Islands have experienced tens of tsunamis generated by earthquakes in the subduction zones of the Pacific "Ring of Fire" (e.g., Alaska-Aleutian, Kuril-Kamchatka, Chile, and Japan). Mapping and dating anomalous beds of sand and silt deposited by tsunamis in low-lying areas along Pacific...

    La Selle, Seanpaul; Richmond, Bruce M.; Jaffe, Bruce E.; Nelson, Alan; Griswold, Frances; Arcos, Maria E.M.; Chague, Catherine; Bishop, James M.; Bellanova, Piero; Kane, Haunani H.; Lunghino, Brent D.; Gelfenbaum, Guy R.

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    Year Published: 2020

    Organic geochemical investigation of far‐field tsunami deposits of the Kahana Valley, O'ahu, Hawai'i

    Far‐field tsunami deposits observed in the Kahana Valley, O'ahu, Hawai'i (USA), were investigated for their organic‐geochemical content. During short high‐energy events, (tsunamis and storms) organic and chemical components are transported with sediment from marine to terrestrial areas. This study investigates the use of anthropogenic based...

    Bellanova, Piero; Frenken, Mike; Richmond, Bruce M.; Schwarzbauer, Jan; La Selle, Seanpaul; Griswold, Frances; Jaffe, Bruce E.; Nelson, Alan R.; Reicherter, Klaus

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    Year Published: 2019

    Physicochemical controls on zones of higher coral stress where Black Band Disease occurs at Mākua Reef, Kauaʻi, Hawaiʻi

    Pervasive and sustained coral diseases contribute to the systemic degradation of reef ecosystems, however, to date an understanding of the physicochemical controls on a coral disease event is still largely lacking. Water circulation and residence times and submarine groundwater discharge all determine the degree to which reef organisms are exposed...

    Oberle, Ferdinand; Storlazzi, Curt D.; Cheriton, Olivia; Takesue, Renee K.; Hoover, Daniel J.; Logan, Joshua B.; Runyon, Christina M.; Kellogg, Christina A.; Johnson, Cordell; Swarzenski, Peter W.

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    Year Published: 2019

    The major coral reefs of Maui Nui, Hawai‘i—distribution, physical characteristics, oceanographic controls, and environmental threats

    Coral reefs are widely recognized as critical to Hawaiʻi’s economy, food resources, and protection from damaging storm waves. Yet overfishing, land-based pollution, and climate change are threatening the health and sustainability of those reefs, and accordingly, both the Federal and State governments have called for protection and effective...

    Field, Michael E.; Storlazzi, Curt D.; Gibbs, Ann E.; D'Antonio, Nicole L.; Cochran, Susan A.
    Field, M.E., Storlazzi, C.D., Gibbs, A.E., D’Antonio, N.L., and Cochran, S.A, 2019, The major coral reefs of Maui Nui, Hawai‘i—Distribution, physical characteristics, oceanographic controls, and environmental threats: U.S. Geological Survey Open-File Report 2019–1019, 71 p., https://doi.org/10.3133/ofr20191019.

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    Year Published: 2019

    The influence of sea level on incident and infragravity wave-driven sediment dynamics across a fringing coral reef

    Coral reefs generate significant volumes of carbonate sediment that becomes the primary source of beach material along many low-latitude shorelines that protect hundreds of millions of people globally. Despite this fact, there is little understanding of the specific processes that transport the carbonate sediment produced on the outer portions of...

    Storlazzi, Curt D.; Cheriton, Olivia; Rosenberger, Kurt J.; Pomeroy, Andrew; Lowe, Ryan J.

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    Year Published: 2019

    Rigorously valuing the role of U.S. coral reefs in coastal hazard risk reduction

    The degradation of coastal habitats, particularly coral reefs, raises risks by increasing the exposure of coastal 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 are not considered in decision making...

    Storlazzi, Curt D.; Reguero, Borja G.; Cole, Aaron D.; Lowe, Erik; Shope, James B.; Gibbs, Ann E.; Nickel, Barry A.; McCall, Robert T.; van Dongeren, Ap R.; Beck, Michael W.
    Storlazzi, C.D., Reguero, B.G., Cole, A.D., Lowe, E., Shope, J.B., Gibbs, A.E., Nickel, B.A., McCall, R.T., van Dongeren, A.R., and Beck, M.W., 2019, Rigorously valuing the role of U.S. coral reefs in coastal hazard risk reduction: U.S. Geological Survey Open-File Report 2019–1027, 42 p., https://doi.org/10.3133/ofr20191027.

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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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    multicolored map of Ocean Shores, Washington
    April 13, 2017

    The Pedestrian Evacuation Analyst is an ArcGIS extension that estimates how long it would take for someone to travel on foot out of a hazardous area that was threatened by a sudden event such as a tsunami, flash flood, or volcanic lahar. It takes into account the elevation changes and the different types of landcover that a person would encounter along the way.

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    Color photograph of inactive lava lake
    September 27, 2021

    View of Halema‘uma‘u at Kīlauea summit - September 24, 2021

    A view looking north into Halema‘uma‘u, at Kīlauea's summit, on September 24, 2021, seen during a brief clear spell between passing rain clouds. There has been no significant change in the surface elevation of the solidified crust of the lava lake since the eruption paused in late May 2021. The dark red main cone of the western fissure complex is visible on the west (left

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    Animated GIF showing past 24 hours of live webcam views of shield volcano
    September 7, 2021

    Last 24 Hours - [B1cam]

    Last 24 Hours - Live view of Halemaʻumaʻu - temporary webcam image showing the crater lava lake from the down-dropped block [B1cam].

    Disclaimer: The webcams are operational 24/7 and faithfully record the dark of night if there are no sources of incandescence or other lights. Thermal webcams record heat rather than light and get better views through volcanic gas. At

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    Animated GIF showing past 24 hours of live webcam views of shield volcano
    September 7, 2021

    Last 24 Hours - [KPcam] - Kīlauea Summit from Mauna Loa Strip Road

    View from Mauna Loa Strip Road looking at the Kīlauea summit to document volcanic eruption plumes.

    Disclaimer: The webcams are operational 24/7 and faithfully record the dark of night if there are no sources of incandescence or other lights. Thermal webcams record heat rather than light and get better views through volcanic gas. At times, clouds and rain obscure

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    No changes were observed at Kīlauea's summit during a brief field visit on September 3, 2021
    September 3, 2021

    Kīlauea summit observations—September 3, 2021

    No changes were observed at Kīlauea's summit during a brief field visit on September 3, 2021. Sunny weather made for spectacular views, though strong winds were blowing. The solidified crust of the lava lake within Halema‘uma‘u—which was active from December 2020 to May 2021—is visible in the lower center of this image. USGS photo by K. Mulliken.

    24 hour webcam gif south of Kilauea caldera
    September 2, 2021

    Last 24 Hours - Live Panorama south of Kīlauea caldera [KOcam]

    Last 24 Hours - Live image looking south of Kīlauea caldera towards the 1982 lava flow [KOcam]

    Disclaimer: The webcams are operational 24/7 and faithfully record the dark of night if there are no sources of incandescence or other lights. Thermal webcams record heat rather than light and get better views through volcanic gas. At times, clouds and rain obscure

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    Temporary webcam located just southwest of Kīlauea summit caldera
    September 2, 2021

    South of Kīlauea caldera towards 1982 flow

    View from a temporary webcam, which is located just southwest of Kīlauea summit caldera, and looks south over the area of the August 2021 intrusion. The dark lava flow on the left of image (mid-ground) is where the 1982 lava flow spilled out of the south caldera.

    View to the southwest from HVO station HRPKE, showing Pu‘ukoa‘e on Kīlauea's Southwest Rift Zone in the background
    September 1, 2021

    View of Pu‘ukoa‘e on Kīlauea's Southwest Rift Zone

    View to the southwest from HVO station HRPKE, showing Pu‘ukoa‘e on Kīlauea's Southwest Rift Zone in the background. Pu‘ukoa‘e formed during an eruption more than 200 years ago; lava flows from the December 1974 eruption of Kīlauea's Southwest Rift Zone—which are visible in the foreground—flowed southwest towards Pu‘ukoa‘e, with one lava flow from the eruption stopping at

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    HVO technician Steven Fuke checks the solar panel at station HRPKE while conducting station maintenance on September 1
    September 1, 2021

    Station HRPKE maintenance

    HVO technician Steven Fuke checks the solar panel at station HRPKE while conducting station maintenance on September 1. HVO remote monitoring stations are powered via solar panels and a suite of batteries. Remote stations such as HRPKE are telemetered, meaning that data collected at the remote station is transferred to the Hawaiian Volcano Observatory and can be viewed in

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    Station HRPKE located southwest of Kīlauea's summit, in the upper Southwest Rift Zone region
    September 1, 2021

    Station HRPKE maintenance

    Station HRPKE is located southwest of Kīlauea's summit, in the upper Southwest Rift Zone region, within Hawai‘i Volcanoes National Park. The station measures sulfur dioxide (SO2) concentrations in the air, as well as local meteorological data such as wind speed, wind direction, and rainfall. On September 1, an HVO scientist and two technicians conducted HRPKE

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    On August 31, the water level in Keller Well was measured at approximately 514.12 m (1686.75 ft) below the ground surface
    August 31, 2021

    Sampling Keller Well in Kīlauea’s south caldera region

    On August 31, the water level in Keller Well was measured at approximately 514.12 m (1686.75 ft) below the ground surface. Though an intrusion of magma took place beneath the ground surface in Kīlauea's south caldera region from August 23–30, water level in Keller Well does not show significant changes as a result of this event. USGS image by P. Nadeau.

    On August 31, Hawaiian Volcano Observatory scientists and technicians visited the Keller Well in Kīlauea's south caldera region
    August 31, 2021

    Sampling Keller Well in Kīlauea’s south caldera region

    On Tuesday, August 31, Hawaiian Volcano Observatory (HVO) scientists and technicians visited the Keller Well in Kīlauea's south caldera region. Water from the well is typically sampled and analyzed quarterly to monitor how magma supply to Kīlauea's summit reservoirs might impact regional ground water. HVO scientists conducted an additional sampling mission due to the

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    Map of volcano summit
    August 30, 2021

    Map of intrusive activity at Kīlauea Volcano―August 23–30, 2021

    This map depicts the detected intrusive activity over the past week at Kīlauea Volcano. The initial swarm of small earthquakes from August 23–25 was centered in the south caldera region, as labelled on the map. A second swarm started late on August 26 in the same area; earthquake counts dropped the following day, but they have remained above background levels and

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    Color photograph of inactive lava lake
    September 27, 2021

    HVO field crews—equipped with specialized safety gear—conduct station maintenance, collect water samples, and monitor for new changes from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

    Color plots and photographs showing Ambae eruption and impacts
    September 23, 2021

    The Pacific is home to dozens of active volcanic systems including the massive Hawaiian shield volcanoes Kīlauea and Mauna Loa. Most basaltic shield volcanoes in the Pacific are related to the hotspots that created the Hawaiian Islands and many of the Polynesian and Micronesian island chains.

    Aerial of lava channel
    September 16, 2021

    Most residents of the Island of Hawaiʻi live on one of four potentially active volcanoes and probably have wondered about the threat of lava flows at one time or another. Interestingly, determining future threats relies on knowledge of the past. The long-term likelihood of an area being invaded by lava in the future, is estimated in two different ways based on the history of lava flow activity.

    HVO scientists walk transects along the down-dropped portion of Kīlauea caldera floor
    September 9, 2021

    Large quantities of volcanic gases, such as carbon dioxide (CO2), sulfur dioxide (SO2), and hydrogen sulfide (H2S), are released into the atmosphere during volcanic eruptions. But even between eruptions, smaller amounts of the same gases continue to escape and can provide important clues about the current state of the volcano and the underlying magma.

    On August 31, the water level in Keller Well was measured at approximately 514.12 m (1686.75 ft) below the ground surface
    September 7, 2021

    HVO field crews—equipped with specialized safety gear—conduct station maintenance, collect water samples, and monitor for new changes from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

    24 hour webcam gif south of Kilauea caldera
    September 2, 2021

    A new USGS Hawaiian Volcano Observatory webcam provides views to the south of Kīlauea caldera in the area of the August 2021 intrusion. Near-live webcam views and a 24-hour animated GIF are available here: [KOcam] - South of Kīlauea caldera towards 1982 flow (usgs.gov)

    Time-series plots of earthquake hourly counts in Kīlauea summit and tilt at the Sandhill station, southwest of Kīlauea’s caldera
    September 2, 2021

    We know that when a volcano erupts, molten red rock makes it to the surface, while during an intrusion it doesn’t. The difference between the two processes, if we depend on seismicity (earth shaking) or deformation (changes in ground surface) instrumentation, is not obvious. The events during the start of either are identical.  But we can’t be certain that an intrusion will lead to an eruption.

    A temporary GPS site set up south of Kīlauea’s summit caldera to measure ground motion during the intrusion last week
    August 31, 2021

    HVO scientists deploy temporary Global Positioning System (GPS) sites to collect data from the intrusion southwest of Kīlauea caldera.

    USGS science for a changing world
    August 30, 2021

    Ground deformation in Kīlauea’s south summit region continues, though at a lower rate than what has been seen in earlier intrusive pulses over the past week. Current earthquake activity remains low compared to the earlier pulses of this intrusive activity. The East Rift Zone remains quiet. 

    USGS science for a changing world
    August 29, 2021

    Ground deformation in Kīlauea’s south summit region continues, though at a rate slightly lower than the rates seen in the first intrusive pulse spanning August 23-25. In contrast, current earthquake activity remains low compared to the earlier pulses of this intrusive activity. The East Rift Zone remains quiet. 

    USGS science for a changing world
    August 28, 2021

    Kīlauea volcano is not erupting. However, intrusive activity that began on August 23 continues south of Kīlauea caldera. Starting on the evening of August 26, ground deformation in Kīlauea’s south summit region resumed at the higher rates seen in the first intrusive pulse spanning August 23-25. 

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