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: March 9, 2016

Pacific Islands Water Science Center

This center is one of 48 Water Science Centers in the USGS, and its mission is to collect, analyze and disseminate the impartial hydrologic data and information needed to wisely manage water resources for the people of the United States, the State of Hawaii, and other Pacific Islands.

Date published: March 9, 2016

Salton Sea Science Office

USGS Salton Sea Science Office works closely with Federal, State, local, nongovernmental, and tribal partners, providing information for management actions. This USGS office has a unique charter to serve as an independent liaison between resource managers and the scientific community. In that capacity the the office provides scientific information and evaluations to decision makers who are...

Date published: March 2, 2016

Hawaiian Volcano Observatory (HVO)

HVO operates monitoring networks, assesses hazards, and issues notifications of volcanic activity and earthquakes in the State of Hawai‘i. HVO scientists conduct fundamental research on volcanic processes and work to educate the communities at risk. HVO is located in Hawaiʻi Volcanoes National Park on the Island of Hawaii.

Date published: November 17, 2015
Status: Active

Webinar: Turning Ecological Stream Classifications into Actionable Science

View this webinar to learn about stream classification efforts in Hawai'i.

Contacts: Ralph Tingley
Date published: September 10, 2014
Status: Completed

Sea Urchin Mortality in the Hawaiian Islands

Scientists from the U.S. Geological Survey (USGS), University of Hawaii, the State of Hawaii Division of Aquatic Resources, and The Nature Conservancy are investigating unusual mortality of collector urchins (Tripneustes gratilla) that has been ongoing since February 2014. As grazers, urchins play a critical role in preventing overgrowth of algae on tropical coral reefs. Awareness of...

Contacts: Thierry M Work
Date published: January 1, 2005
Status: Completed

Mud Damages Hawaiian Coral Reefs

Information about the USGS Pacific Coastal and Marine Science Center's research from 2000-2004, on how mud damages hawaiian coral reefs.

Date published: January 1, 2004
Status: Completed

Island-hopping Coral Larvae in Hawaii

Information about the USGS Pacific Coastal and Marine Science Center's 2003 study on island-hopping coral larvae in Hawaii.

Date published: January 1, 1989
Status: Completed

Giant Hawaiian Underwater Landslides

Information about the USGS Pacific Coastal and Marine Science Center's studies of giant underwater landslides in 1986 and 1988.

Contacts: Laura Torresan
Filter Total Items: 89
Date published: March 17, 2016

Volcano Monitoring Data

Many volcanoes in the U.S. are monitored by arrays of several instruments that detect subtle movements within the earth and changes in gas and water chemistry. The Volcano Hazards Program streams this data to its Volcano Observatories and makes it available on volcano-specific websites.

Date published: March 4, 2016

Current Alerts for U.S. Volcanoes

Volcano-alert notifications are produced by Volcano Observatory scientists based on analysis of data from monitoring networks, direct observations, and satellite sensors. They are issued for both increasing and decreasing volcanic activity and include text about the nature of the unrest or eruption and about potential or current hazards and likely outcomes.

Date published: January 1, 2016

Digital image mosaic of the nearshore coastal waters of Kamalo on the island of Moloka'i generated using aerial photographs and SHOALS airborne lidar bathymetry data

This portion of the data release contains a digital image mosaic with 1.0 foot-per-pixel resolution of the Kamalo area on the south coast of Moloka'i. This image mosaic was generated using digitized 1:10K natural color photographs collected in January 2000 by Air Survey Hawai'i, Inc. for the U.S. Geological Survey. Also available is a lower-resolution 'browse' graphic of the image mos

Date published: January 1, 2016

Digital image mosaic of the nearshore coastal waters of Wai'alae on the island of O'ahu generated using aerial photographs and SHOALS airborne lidar bathymetry data

This portion of the data release contains a digital image mosaic with 1.0 foot-per-pixel (0.3048 meter-per-pixel) resolution of the Wai'alae area on the southeast coast of O'ahu. This image mosaic was generated using digitized 1:10K natural color photographs collected by the National Oceanic and Atmospheric Administration (NOAA) National Ocean Service. Also available is a lower-reso

Date published: January 1, 2016

Digital image mosaic of the nearshore coastal waters of Kamiloloa on the island of Moloka'i generated using aerial photographs and SHOALS airborne lidar bathymetry data

This portion of the data release contains a digital image mosaic with 1 meter-per-pixel resolution of the Kamiloloa area on the south coast of Moloka'i. This image mosaic was generated using digitized 1:35K natural color photographs collected in September 1993 by the National Oceanic and Atmospheric Administration (NOAA) National Ocean Service (NOS). Also available is a lower-resoluti

Date published: January 1, 2016

Digital image mosaics of the nearshore coastal waters of selected areas on the island of Hawai'i generated using aerial photographs and SHOALS airborne lidar bathymetry data

This portion of the data release contains image mosaics generated using digitized 1:24K natural color photographs collected in June 2000 by the National Oceanic and Atmospheric Administration (NOAA) National Ocean Service (NOS). These four image mosaics have 1.0 meter-per-pixel resolution, and intermittently cover approximately 53 km (33 mi) of shallow, coastal waters along the

Date published: January 1, 2016

Digital image mosaic of the nearshore coastal waters of Kaunakakai on the island of Moloka'i generated using aerial photographs and SHOALS airborne lidar bathymetry data

This portion of the data release contains a digital image mosaic with 1.0 foot-per-pixel resolution of the Kaunakakai area on the south coast of Moloka'i. This image mosaic was generated using digitized 1:10K natural color photographs collected in January 2000 by Air Survey Hawai'i, Inc. for the U.S. Geological Survey. Also available is a lower-resolution 'browse' graphic of the image

Date published: January 1, 2016

Physics-based numerical circulation model outputs of ocean surface circulation during the 2010-2013 summer coral-spawning seasons in Maui Nui, Hawaii, USA

Ocean surface current results from a physics-based, 3-dimensional coupled ocean-atmosphere numerical model were generated to understand coral larval dispersal patterns in Maui Nui, Hawaii, USA. The model was used to simulate coral larval dispersal patterns from a number of existing State-managed reefs and large tracks of reefs with high coral coverage that might be good candidates for marin...

Date published: January 1, 2016

Digital image mosaic of the nearshore coastal waters of Kawela on the island of Moloka'i generated using aerial photographs and SHOALS airborne lidar bathymetry data

This portion of the data release contains a digital image mosaic with 1.0 foot-per-pixel resolution of the Kawela area on the south coast of Moloka'i. This image mosaic was generated using digitized 1:10K natural color photographs collected in January 2000 by Air Survey Hawai'i, Inc. for the U.S. Geological Survey. Also available is a lower-resolution 'browse' graphic of the image mos

Date published: January 1, 2016

Digital shaded-relief image mosaic of the nearshore coastal waters of southcentral Moloka'i generated using aerial photographs and SHOALS airborne lidar bathymetry data

This portion of the data release contains a shaded-relief image mosaic of the nearshore coastal waters along southcentral Moloka'i. This image mosaic was generated using digitized 1:35K natural color photographs collected in September 1993 by the National Oceanic and Atmospheric Administration (NOAA) National Ocean Service (NOS) and scanned in at 1-meter resolution. Several of the 1-m

Date published: January 1, 2016

Digital image mosaic of the nearshore coastal waters of Waiakane on the island of Moloka'i generated using aerial photographs and SHOALS airborne lidar bathymetry data

This portion of the data release contains a digital image mosaic with 1 meter-per-pixel resolution of the Waiakane area on the south coast of Moloka'i. This image mosaic was generated using digitized 1:35K natural color photographs collected in September 1993 by the National Oceanic and Atmospheric Administration (NOAA) National Ocean Service (NOS). Also available is a lower-resolutio

Date published: January 1, 2016

Digital image mosaic of the nearshore coastal waters of Portlock on the island of O'ahu generated using aerial photographs and SHOALS airborne lidar bathymetry data

This portion of the data release contains a digital image mosaic with 1.0 foot-per-pixel (0.3048 meter-per-pixel) resolution of the Portlock area on the southeast coast of O'ahu. This image mosaic was generated using digitized 1:10K natural color photographs collected by the National Oceanic and Atmospheric Administration (NOAA) National Ocean Service. Also available is a lower-resolu

Filter Total Items: 377
Map of volcano summit activity
December 22, 2020

Kīlauea summit eruption reference map showing the location of current and previous lake activity

Color interferogram showing volcano deformation
December 22, 2020

This “interferogram” was created from satellite radar data acquired over Kīlauea Volcano on December 6 and 21 (at 6 PM HST each day). The colored fringes show ground deformation that occurred during that 15-day period. Each fringe is equivalent to about 1.55 cm (0.6 in) of ground deformation towards or away from the satellite.

Map of lava lake depth
December 22, 2020

Kīlauea summit eruption lava lake depth map generated from December 21, 2020 imagery

Color thermal map of volcano summit and lava lake
December 22, 2020

December 21, 2020—Kīlauea summit eruption thermal map constructed from aerial imagery

Color map depicting lava flow thickness
November 23, 2020

Final map of Kīlauea 2018 lower East Rift Zone lava flow thicknesses

The September 23, 2020, overflight provided aerial photos of Kīlauea's summit that were used to construct an updated map. Poor w
September 25, 2020

The September 23, 2020, overflight provided aerial photos of Kīlauea's summit that were used to construct an updated map.

Color map of camera network coverage
September 20, 2020

Map of the USGS Hawaiian Volcano Observatory’s current camera network coverage. 

Color graphic showing Mauna Loa historical lava flows, hazard zones, and county districts
June 5, 2020

Map showing the subaerial extents of historical lava flows from Mauna Loa. Lava flow hazard zones and districts of the County of Hawai‘i are also depicted.

thermal map shows relative surface temperatures across Kīlauea's 2018 lower East Rift Zone lava flow field.
August 31, 2019

This preliminary thermal map shows relative surface temperatures across Kīlauea's 2018 lower East Rift Zone lava flow field.

Thermal map of Kīlauea summit
August 22, 2019

This thermal map was constructed from 1008 images collected by a thermal camera during a helicopter overflight on August 22, 2019.

Thermal map of Kīlauea Caldera
April 8, 2019

This thermal map, which was constructed by merging about 1300 images from a morning helicopter overflight on April 8, shows the distribution of some prominent thermal features in Kīlauea's summit caldera. 

preliminary map of Kīlauea lower East Rift Zone lava flow thicknesses
February 19, 2019

Data depicted on this preliminary map of Kīlauea lower East Rift Zone lava flow thicknesses are subject to change.

Filter Total Items: 121
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Year Published: 2010

Coral Ba/Ca records of sediment input to the fringing reef of the southshore of Moloka'i, Hawai'i over the last several decades

The fringing reef of southern Moloka’i is perceived to be in decline because of land-based pollution. In the absence of historical records of sediment pollution, ratios of coral Ba/Ca were used to test the hypothesis that sedimentation has increased over time. Baseline Ba/Ca ratios co-vary with the abundance of red, terrigenous sediment visible in...

Prouty, N.G.; Field, M.E.; Stock, J. D.; Jupiter, S.D.; McCulloch, M.
Coral Ba/Ca records of sediment input to the fringing reef of the southshore of Moloka'i, Hawai'i over the last several decades; 2010; Article; Journal; Marine Pollution Bulletin; Prouty, N. G.; Field, M. E.; Stock, J. D.; Jupiter, S. D.; McCulloch, M.

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Year Published: 2009

A Multitracer Approach to Detecting Wastewater Plumes from Municipal Injection Wells in Nearshore Marine Waters at Kihei and Lahaina, Maui, Hawaii

Municipal wastewater plumes discharging from aquifer to ocean were detected by nearshore wading surveys at Kihei and Lahaina, on the island of Maui in Hawaii. Developed in cooperation with the Hawaii State Department of Health, the survey methodology included instrument trolling to detect submarine groundwater discharge, followed by analysis of...

Hunt, Charles D.; Rosa, Sarah N.
A Multitracer Approach to Detecting Wastewater Plumes from Municipal Injection Wells in Nearshore Marine Waters at Kihei and Lahaina, Maui, Hawaii; 2009; SIR; 2009-5253; Hunt, Charles D. Jr.; Rosa, Sarah N.

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Year Published: 2009

Reconnaissance Assessment of the Potential for Roadside Dry Wells to Affect Water Quality on the Island of Hawai'i

The County of Hawai'i Department of Public Works (DPW) uses dry wells to dispose of stormwater runoff from roads. Recently, concern has been raised that water entering the dry wells may transport contaminants to groundwater and affect the quality of receiving waters. The DPW operates 2,052 dry wells. Compiling an inventory of these dry wells and...

Izuka, Scot K.; Senter, Craig A.; Johnson, Adam G.
Reconnaissance Assessment of the Potential for Roadside Dry Wells to Affect Water Quality on the Island of Hawai'i; 2009; SIR; 2009-5249; Izuka, Scot K.; Senter, Craig A.; Johnson, Adam G.

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Year Published: 2009

Ecological Assessment of Wadeable Streams on O`ahu, Hawai'i, 2006-2007: A Pilot Study

In 2006-07, the U.S. Geological Survey (USGS) Pacific Islands Water Science Center (PIWSC), in cooperation with the Hawai'i Department of Health (HDOH), conducted a pilot study as a participant in the U.S. Environmental Protection Agency's (USEPA) Wadeable Streams Assessment (WSA) program. Forty randomly selected sites on perennial streams on O'...

Wolff, Reuben H.; Koch, Linda A.
Ecological Assessment of Wadeable Streams on O`ahu, Hawai'i, 2006-2007: A Pilot Study; 2009; SIR; 2009-5229; Wolff, Reuben H.; Koch, Linda A.

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Year Published: 2009

Rainfall, Discharge, and Water-Quality Data During Stormwater Monitoring, July 1, 2008, to June 30, 2009 - Halawa Stream Drainage Basin and the H-1 Storm Drain, Oahu, Hawaii

Storm runoff water-quality samples were collected as part of the State of Hawaii Department of Transportation Stormwater Monitoring Program. The program is designed to assess the effects of highway runoff and urban runoff on Halawa Stream, and to assess the effects from the H-1 storm drain on Manoa Stream. For this program, rainfall data were...

Presley, Todd K.; Jamison, Marcael T.J.
Rainfall, Discharge, and Water-Quality Data During Stormwater Monitoring, July 1, 2008, to June 30, 2009 - Halawa Stream Drainage Basin and the H-1 Storm Drain, Oahu, Hawaii; 2009; OFR; 2009-1162; Presley, Todd K.; Jamison, Marcael T. J.

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Year Published: 2009

An integrated approach to benthic habitat mapping using remote sensing and GIS: An example from the Hawaiian Islands

This chapter documents our effort to map benthic habitats within the KalokoHonokohau National Historic Park, Hawai`i, USA. We produce detailed benthichabitat maps by using a combination of color aerial photography, high-resolution bathymetry, and georeferenced underwater video and still photography. We classify individual habitat polygons using...

Yang, X.; Gibbs, A.E.; Cochran, Susan A.

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Year Published: 2008

Suspended-sediment and nutrient loads for Waiakea and Alenaio Streams, Hilo, Hawaii, 2003-2006

Suspended sediment and nutrient samples were collected during wet-weather conditions at three sites on two ephemeral streams in the vicinity of Hilo, Hawaii during March 2004 to March 2006. Two sites were sampled on Waiakea Stream at 80- and 860-foot altitudes during March 2004 to August 2005. One site was sampled on Alenaio Stream at 10-foot...

Presley, Todd K.; Jamison, Marcael T.J.; Nishimoto, Dale C.
Suspended-sediment and nutrient loads for Waiakea and Alenaio Streams, Hilo, Hawaii, 2003-2006; 2008; OFR; 2007-1429; Presley, Todd K.; Jamison, Marcael T. J.; Nishimoto, Dale C.

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Year Published: 2008

Ground water on tropical Pacific Islands— Understanding a vital resource

To a casual observer, tropical Pacific islands seem idyllic. Closer scrutiny reveals that their generally small size makes them particularly vulnerable to economic and environmental stresses imposed by rapidly growing populations, increasing economic development, and global climate change. On these islands, freshwater is one of the most precious...

Tribble, Gordon

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Year Published: 2008

Ground-Water Availability in the Wailuku Area, Maui, Hawai'i

Most of the public water supply in Maui, Hawai'i, is from a freshwater lens in the Wailuku area of the island. Because of population growth, ground-water withdrawals from wells in this area increased from less than 10 Mgal/d during 1970 to about 23 Mgal/d during 2006. In response to increased withdrawals from the freshwater lens in the Wailuku...

Gingerich, Stephen B.
Ground-Water Availability in the Wailuku Area, Maui, Hawai'i; 2008; SIR; 2008-5236; Gingerich, Stephen B.

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Year Published: 2008

The Significance of Accounting Order for Evapotranspiration and Recharge in Monthly and Daily Threshold-Type Water Budgets

Most threshold-type water-budget models account for the loss of water by evapotranspiration before accounting for recharge. Recharge estimates can differ substantially, depending on whether recharge is counted before or after evapotranspiration in the water budget. This disparity is the source of uncertainty and is most pronounced for areas where...

Oki, Delwyn S.
The Significance of Accounting Order for Evapotranspiration and Recharge in Monthly and Daily Threshold-Type Water Budgets; 2008; SIR; 2008-5163; Oki, Delwyn S.

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Year Published: 2008

Rainfall, Discharge, and Water-Quality Data During Stormwater Monitoring, July 1, 2007, to June 30, 2008; Halawa Stream Drainage Basin and the H-1 Storm Drain, Oahu, Hawaii

Storm runoff water-quality samples were collected as part of the State of Hawaii Department of Transportation Stormwater Monitoring Program. The program is designed to assess the effects of highway runoff and urban runoff on Halawa Stream and to assess the effects from the H-1 storm drain on Manoa Stream. For this program, rainfall data were...

Presley, Todd K.; Jamison, Marcael T.J.; Young, Stacie T.M.
Rainfall, Discharge, and Water-Quality Data During Stormwater Monitoring, July 1, 2007, to June 30, 2008; Halawa Stream Drainage Basin and the H-1 Storm Drain, Oahu, Hawaii; 2008; OFR; 2008-1233; Presley, Todd K.; Jamison, Marcael T.J.; Young, Stacie T.M.

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Year Published: 2008

Effects of the H-3 Highway Stormwater Runoff on the Water Quality of Halawa Stream, Oahu, Hawaii, November 1998 to August 2004

Since November 1998, water-quality data have been collected from the H-3 Highway Storm Drain C, which collects runoff from a 4-mi-long viaduct, and from Halawa Stream on Oahu, Hawaii. From January 2001 to August 2004, data were collected from the storm drain and four stream sites in the Halawa Stream drainage basin as part of the State of Hawaii...

Wolff, Reuben H.; Wong, Michael F.
Effects of the H-3 Highway Stormwater Runoff on the Water Quality of Halawa Stream, Oahu, Hawaii, November 1998 to August 2004; 2008; SIR; 2008-5034; Wolff, Reuben. H.; Wong, Michael F.

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Color photograph of volcanic vent and bird
October 8, 2021

October 8, 2021 — Kīlauea, active west vent in Halema‘uma‘u crater

A Koa‘e Kea (white-tailed tropicbird) flies above the erupting west vent within Halema‘uma‘u crater, at the summit of Kīlauea. Photo taken from the south rim of Halema‘uma‘u at 10:41 a.m. HST on Oct. 8, 2021. USGS photo by J.M. Chang. 

Color photograph of scientist monitoring eruption
October 8, 2021

October 8, 2021 — Kīlauea summit eruption monitoring

USGS scientist takes video of the erupting west vent within Halema‘uma‘u crater, at the summit of Kīlauea. Photo taken from the northwest rim of Halema‘uma‘u at 12:27 p.m. HST on Oct. 8, 2021. USGS photo by J.M. Chang.

Color photograph of lava lake
October 7, 2021

Kīlauea summit eruption in Halema‘uma‘u crater – October 7, 2021

A wide view of the ongoing Kīlauea summit eruption within Halema‘uma‘u, taken from the northwest rim of the crater. The west vent lava fountains (right) continues to supply lava into the slowly rising lava lake. Lava fountaining is no longer visible through the central and southern portions of the lava lake surface. Over the past day or two the surface crust in the north

...
Color photograph of volcanic vent
October 7, 2021

October 7, 2021 — Kīlauea eruption

The eruption continues in Halema‘uma‘u crater, at Kīlauea summit. This view from the southern crater rim shows the west vent fountains (center) supplying lava into the western portion of the lava lake. SO2 gas emission rates remain elevated, and were measured at 4,700 tonnes per day on October 7. USGS photo taken by L. DeSmither on October 7, 2021.

October 7, 2021

October 7, 2021 — Kīlauea volcanic vent

The eruption continues in Halema‘uma‘u crater, at the summit of Kīlauea. Lava fountaining no longer emerges from the central portion of the lake, with fountaining limited to the west vent shown here. Low fountaining within the cone supplies lava into the lake via a short spillway. 

Color photograph of island in lava lake
October 7, 2021

October 7, 2021 — Kīlauea eruption

Late afternoon sunlight illuminates the main island in the lava lake in Halema‘uma‘u crater, at the summit of Kīlauea. The island formed in the previous summit eruption (December 2020-May 2021), and was covered with fresh spatter during the opening stages of the current eruption. USGS photo by M. Patrick.

October 7, 2021

Kīlauea summit eruption field work – October 7, 2021

An HVO geologist makes observations, collects data, and maintains instruments during the ongoing eruption within Halema'uma'u. This video shows some of the typical field work HVO geologists do during eruption monitoring, including collecting high-resolution videos, photos, and thermal images, taking laser rangefinder measurements, and maintaining field camera stations.

Color photograph of lava lake surface
October 7, 2021

October 7, 2021 — Kīlauea eruption

This photo from Thursday, October 7, shows the lava lake near the western vent in Halema‘uma‘u crater, at the summit of Kīlauea. The zig zag pattern separating the crustal plates is evident here, as are several spreading zones which cut across the pattern. USGS photo by M. Patrick.

Color photograph of volcanic vent
October 7, 2021

October 7, 2021 — Kīlauea eruption

A view of the west vent in Halema‘uma‘u crater, at the summit of Kīlauea. This photo was taken from the northwest caldera rim, providing a good view inside the cone, as well as a view of the small spillway supplying lava into the lake. USGS photo by M. Patrick.

Color webcam photo of lava lake
October 7, 2021

Kīlauea summit eruption in Halemaʻumaʻu crater - October 7, 2021

KWcam image taken on October 7, 2021, just after 6 a.m. HST. This image shows the ongoing eruption within Halemaʻumaʻu crater at the summit of Kīlauea. The eruption began the afternoon of September 29, 2021, as fissures in the floor of the crater; this activity is generating a lava lake that is slowly filling the crater. Near-real-time images captured by the KWcam are 

...
Color photograph of volcanic vent
October 7, 2021

October 7, 2021 — Kīlauea

The eruption continues in Halema‘uma‘u crater, at the summit of Kīlauea. Lava fountaining no longer emerges from the central portion of the lake, with fountaining limited to the west vent shown here. Low fountaining within the cone supplies lava into the lake via a short spillway. USGS image by M. Patrick.

Color photograph of lava
October 6, 2021

Crustal foundering in Halema‘uma‘u

A large crustal foundering event in Kīlauea's ongoing Halema‘uma‘u eruption occurred in the late afternoon on October 6, 2021. This photo was taken from the northwest crater rim looking east across the lava lake. USGS Photo: K. Lynn

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Color image of the Island of Hawaii
August 5, 2021

Geologists at the USGS Hawaiian Volcano Observatory (HVO) had their mobile phones buzzing this past week with automated alert messages, notifying them that there was something new and hot on the Island of Hawaiʻi.  Although the internal alert system is meant to detect new volcanic activity, no eruption was occurring.  

Good views of Halema‘uma‘u's lava lake...
August 2, 2021

See a list of recent Hawaiian Volcano Observatory publications and data releases here.

Color photograph of lava lake
August 2, 2021

Kīlauea's summit is no longer erupting; lava supply to the Halemaʻumaʻu lava lake has ceased and sulfur dioxide emissions have decreased to near pre-eruption background levels. HVO field crews—equipped with specialized safety gear—monitor for new changes from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

Color photograph of caldera
July 30, 2021

Kīlauea's summit is no longer erupting; lava supply to the Halemaʻumaʻu lava lake has ceased and sulfur dioxide emissions have decreased to near pre-eruption background levels. HVO field crews—equipped with specialized safety gear—monitor for new changes from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

Color images of volcanic plume
July 29, 2021

This week marks the second anniversary of the appearance of water in Kīlauea’s Halema‘uma‘u crater, so it seems timely to discuss the water lake’s demise last December 20, or rather, its transformation into a volcanic plume and how we use weather radar to investigate how that happened.

Color photograph of scientists in field
July 28, 2021

Field Work at Keller Well. Kīlauea's summit is no longer erupting; lava supply to the Halemaʻumaʻu lava lake has ceased and sulfur dioxide emissions have decreased to near pre-eruption background levels. HVO field crews—equipped with specialized safety gear—monitor for new changes from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

HVO geologist conducts maintenance on the S1cam web camera located along the southern rim of Halema‘uma‘u
July 26, 2021

Kīlauea's summit is no longer erupting; lava supply to the Halemaʻumaʻu lava lake has ceased and sulfur dioxide emissions have decreased to near pre-eruption background levels. HVO field crews—equipped with specialized safety gear—monitor for new changes from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

USGS science for a changing world
July 23, 2021

The USGS recently published "Unoccupied Aircraft Systems (UAS) video of the 2018 summit eruption of Kīlauea Volcano, Hawaii." The Data Release contains Unoccupied Aircraft Systems (UAS) footage from the 2018 summit collapse of Kīlauea Volcano, Island of Hawai‘i. 

An HVO geologist conducts a routine high-precision survey of the inactive lava lake in Halema‘uma‘u, at the summit of Kīlauea
July 23, 2021

Kīlauea's summit is no longer erupting; lava supply to the Halemaʻumaʻu lava lake has ceased and sulfur dioxide emissions have decreased to near pre-eruption background levels. HVO field crews—equipped with specialized safety gear—monitor for new changes from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

Continuously recording Global Positioning System (GPS) equipment installed on the south side of the Island of Hawai‘i
July 22, 2021

Many people living in the Hawaiian Islands are accustomed to feeling occasional earthquakes since the State of Hawaii is one of the most seismically active locations in the United States. Unlike some other earthquake-prone places in the U.S., for example California, where the earthquakes are related to tectonic plates sliding past each other, our earthquakes are related to volcanoes.  

Color photograph of volcanic vent
July 19, 2021

Kīlauea's summit is no longer erupting; lava supply to the Halemaʻumaʻu lava lake has ceased and sulfur dioxide emissions have decreased to near pre-eruption background levels. HVO field crews—equipped with specialized safety gear—monitor for new changes from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

Black and white maps of lava flow
July 15, 2021

The most recent page in Mauna Loa’s eruptive history was written in 1984. The eruption began in March of 1984, about a decade after the 1975 summit eruption (the topic of last week’s “Volcano Watch” article). Here’s a quick look at how the eruption proceeded and its impacts on residents as gleaned from contemporaneous newspaper accounts.