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: 67
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: 88
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 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 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 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

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

Date published: January 1, 2016

Digital shaded-relief image mosaic of the nearshore coastal waters southwest 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 southwest 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-mete

Date published: January 1, 2016

Digital image mosaic of the nearshore coastal waters of Umipa'a 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 Umipa'a 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

Digital image mosaics of the nearshore coastal waters of Kailua-Kona on the Island of Hawai'i generated using aerial photographs and SHOALS airborne lidar bathymetry data

This portion of the data release contains an image mosaic with 1.0 meter-per-pixel resolution of the Kailua-Kona area on the west 'Kona' coast of the island of Hawai'i. This image mosaic was generated using digitized 1:24K natural color photographs collected in June 2000 by the National Oceanic and Atmospheric Administration (NOAA) National Ocean Service (NOS). Two versions of the

Filter Total Items: 298
Map showing lower East Rift Zone lava flows and fissures
June 18, 2018

Map as of 9:00 a.m. HST, June 18, 2018

Thermal map of fissure system and lava flows
June 16, 2018

This thermal map shows the fissure system and lava flows as of 6 am on Saturday, June 16.

Map showing lower East Rift Zone lava flows and fissures
June 15, 2018

Map as of 10:00 a.m. HST, June 15, 2018

Map showing lower East Rift Zone lava flows and fissures
June 14, 2018

Map as of 11:00 a.m. HST, June 14, 2018

Thermal map of fissure system and lava flows
June 14, 2018

This thermal map shows the fissure system and lava flows as of 6 am on Thursday June 14

Map showing lower East Rift Zone lava flows and fissures
June 13, 2018

Map as of 10:00 a.m. HST, June 13, 2018

Thermal map of fissure system and lava flows
June 12, 2018

This thermal map shows the fissure system and lava flows as of 12:30 pm on Tuesday, June 5

Map showing lower East Rift Zone lava flows and fissures
June 11, 2018

Map as of 3:00 p.m. HST, June 11, 2018

Map showing lower East Rift Zone lava flows and fissures
June 10, 2018

Map as of 12:00 p.m. (noon) HST, June 10, 2018

Thermal map of fissure system and lava flows
June 10, 2018

This thermal map shows the fissure system and lava flows as of 6:45 am on Sunday, June 10

Thermal map of fissure system and lava flows
June 9, 2018

This thermal map shows the fissure system and lava flows as of 5:30 pm on Saturday, June 9

Map showing lower East Rift Zone lava flows and fissures
June 9, 2018

Map as of 10:00 a.m. HST, June 9, 2018

Filter Total Items: 111
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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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Year Published: 2007

Variations in Community Exposure and Sensitivity to Tsunami Hazards in the State of Hawai'i

Hawai`i has experienced numerous destructive tsunamis and the potential for future events threatens the safety and economic well being of its coastal communities. Although tsunami-evacuation zones have been delineated, what is in these areas and how communities have chosen to develop within them has not been documented. A community-level...

Wood, Nathan; Church, Alyssia; Frazier, Tim; Yarnal, Brent
Variations in Community Exposure and Sensitivity to Tsunami Hazards in the State of Hawai'i; 2007; SIR; 2007-5208; Wood, Nathan; Church, Alyssia; Frazier, Tim; Yarnal, Brent

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Year Published: 2007

Effects of Agricultural Land-Use Changes and Rainfall on Ground-Water Recharge in Central and West Maui, Hawai`i, 1926-2004

Concern surrounding declines in ground-water levels and an increase in the chloride concentration of water pumped from wells in the Iao aquifer system on the Island of Maui has prompted an investigation into the long-term sustainability of current (2006) and future ground-water withdrawals. As part of this investigation, a water budget for central...

Engott, John A.; Vana, Thomas T.
Effects of Agricultural Land-Use Changes and Rainfall on Ground-Water Recharge in Central and West Maui, Hawai`i, 1926-2004; 2007; SIR; 2007-5103; Engott, John A.; Vana, Thomas T.

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Year Published: 2007

Effects of Ground-Water Withdrawal on Kaunakakai Stream Environmental Restoration Plan, Moloka`i, Hawai`i

The U.S. Army Corps of Engineers, in cooperation with the County of Maui Department of Public Works and Environmental Management, has proposed to construct 2.75 acres of shallow ponds and mudflats near the mouth of Kaunakakai Stream, Moloka`i, Hawai`i to restore habitat for the endangered native Hawaiian Stilt. Kaunakakai Stream is ephemeral...

Oki, Delwyn S.
Effects of Ground-Water Withdrawal on Kaunakakai Stream Environmental Restoration Plan, Moloka`i, Hawai`i; 2007; SIR; 2007-5128; Oki, Delwyn S.

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Year Published: 2007

Rainfall, Streamflow, and Water-Quality Data During Stormwater Monitoring, Halawa Stream Drainage Basin, Oahu, Hawaii, July 1, 2006 to June 30, 2007

Storm runoff water-quality samples were collected as part of the State of Hawaii Department of Transportation Stormwater Monitoring Program. This program is designed to assess the effects of highway runoff and urban runoff on Halawa Stream. For this program, rainfall data were collected at two stations, continuous streamflow data at three stations...

Young, Stacie T.M.; Jamison, Marcael T.J.
Rainfall, Streamflow, and Water-Quality Data During Stormwater Monitoring, Halawa Stream Drainage Basin, Oahu, Hawaii, July 1, 2006 to June 30, 2007; 2007; OFR; 2007-1213; Young, Stacie T. M.; Jamison, Marcael T. J.

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Year Published: 2007

Natural and Diverted Low-Flow Duration Discharges for Streams Affected by the Waiahole Ditch System, Windward O`ahu, Hawai`i

For nearly a century, the Waiahole Ditch System has diverted an average of approximately 27 million gallons per day of water from the wet, northeastern part of windward O`ahu, Hawai`i, to the dry, central part of the island to meet irrigation needs. The system intercepts large amounts of dike-impounded ground water at high altitudes (above...

Yeung, Chiu W.; Fontaine, Richard A.
Natural and Diverted Low-Flow Duration Discharges for Streams Affected by the Waiahole Ditch System, Windward O`ahu, Hawai`i; 2007; SIR; 2006-5285; Yeung, Chiu W.; Fontaine, Richard A.

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Year Published: 2007

Water Use in Wetland Kalo Cultivation in Hawai`i

Ten cultivation areas (8 windward, 2 leeward) were selected for a kalo water-use study, primarily on the basis of the diversity of environmental and agricultural conditions under which wetland kalo is grown and landowner permission and availability. Flow and water-temperature data were collected at the lo`i complex level and at the individual lo`i...

Gingerich, Stephen B.; Yeung, Chiu W.; Ibarra, Tracy-Joy N.; Engott, John A.
Water Use in Wetland Kalo Cultivation in Hawai`i; 2007; OFR; 2007-1157; Gingerich, Stephen B.; Yeung, Chiu W.; Ibarra, Tracy-Joy N.; Engott, John A.

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Year Published: 2007

Ground-Water Nutrient Flux to Coastal Waters and Numerical Simulation of Wastewater Injection at Kihei, Maui, Hawaii

Water sampling and numerical modeling were used to estimate ground-water nutrient fluxes in the Kihei area of Maui, where growth of macroalgae (seaweed) on coral reefs raises ecologic concerns and accumulation on beaches has caused odor and removal problems. Fluxes and model results are highly approximate, first-order estimates because very few...

Hunt, Charles D.
Ground-Water Nutrient Flux to Coastal Waters and Numerical Simulation of Wastewater Injection at Kihei, Maui, Hawaii; 2007; SIR; 2006-5283; Hunt, Charles D., Jr.

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Year Published: 2006

Water Resources Data: Hawaii and Other Pacific Areas, Water Year 2005. Volume 1. Hawaii

Water resources data for the 2005 water year for Hawaii consist of records of stage, discharge, and water quality of streams and springs; water levels and quality of water wells; and rainfall totals. * Water discharge for 59 gaging stations on streams, springs, and ditches. * Water-quality data for 6 streams. * Water levels for 80 observation...

Fontaine, Richard A.
Water Resources Data: Hawaii and Other Pacific Areas, Water Year 2005. Volume 1. Hawaii; 2006; WDR; HI-05-1; Fontaine, Richard A.

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Year Published: 2006

Effects of Surface-Water Diversion and Ground-Water Withdrawal on Streamflow and Habitat, Punaluu Stream, Oahu, Hawaii

The surface- and ground-water resources of the Punaluu area of northeast Oahu, Hawaii, have been and continue to be important for cultural, domestic, agricultural, recreational, and aesthetic purposes. Punaluu Stream flows perennially because rain falls frequently in the area and ground water discharges to the stream. Flow in Punaluu Stream is...

Oki, Delwyn S.; Wolff, Reuben H.; Perreault, Jeff A.
Effects of Surface-Water Diversion and Ground-Water Withdrawal on Streamflow and Habitat, Punaluu Stream, Oahu, Hawaii; 2006; SIR; 2006-5153; Oki, Delwyn S.; Wolff, Reuben H.; Perreault, Jeff A.

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Year Published: 2006

Numerical Simulation of the Hydrologic Effects of Redistributed and Additional Ground-Water Withdrawal, Island of Molokai, Hawaii

Because of increased demand for water associated with a growing population, projected increases in demand over the next few decades, and rising salinity of the water pumped from some existing wells, the County of Maui Department of Water Supply (DWS) is currently (2006) considering drilling additional wells to replace or supplement existing wells...

Oki, Delwyn S.
Numerical Simulation of the Hydrologic Effects of Redistributed and Additional Ground-Water Withdrawal, Island of Molokai, Hawaii; 2006; SIR; 2006-5177; Oki, Delwyn S.

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January 6, 2020

How Our Reefs Protect Us: Valuing the Benefits of U.S. Reefs

The degradation of coastal habitats, particularly coral reefs, raises risks by increasing the exposure of coastal communities to flooding hazards during storms. 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. Here we

Aerial imagery of islands is marked to show different data about each island's coast.
January 1, 2020

Hawaiʻi Coral Reefs and Coastal Hazard Risk Reduction

Rigorously Valuing the Role of Hawaiʻi’s Coral Reefs in Coastal Hazard Risk Reduction

Estimated Annual Benefits

Maps of Hawaiʻi showing the distribution of the value of averted direct building damages, indirect economic activity losses, and population annually protected from flooding by coral reefs. Results at 10 m2 resolution are aggregated into

...
Ohia forest with dieback resulting from Rapid Ohia Death, Hawaii Island.
December 31, 2019

Ohia forest with dieback

Aerial photo of ʻōhiʻa forest on Hawaii Island, including dieback resulting from Rapid Ohia Death.

Ohia seedlings in dibble tubes, prior to planting
December 31, 2019

Ohia seedlings before planting

ʻŌhiʻa seedlings in dibble tubes, prior to planting.

December 27, 2019

Virtual flyover of Kīlauea summit

An overflight on December 18 provided aerial photographs of Kīlauea caldera, which were used to construct a 3D model. The water pond is visible in the deepest portion of Halema‘uma‘u crater. For scale, the water pond is 189 m (650 ft) long and approximately 600 m (1970 ft) below the western caldera rim.

December 27, 2019

Timelapse video of the water pond at Kīlauea summit

This timelapse sequence shows two hours of activity at the water pond in Halema‘uma‘u, at Kīlauea's summit. Flow is evident along the sharp orange color boundary in the center of the pond, as well as along portions of the shoreline. The pond is 189 m (650 ft) long. The vido was taken on the eastern rim.

December 8, 2019

How Our Reefs Protect Us: Valuing the Benefits of U.S. Reefs (AD)

The degradation of coastal habitats, particularly coral reefs, raises risks by increasing the exposure of coastal communities to flooding hazards during storms. 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. Here we

Continued slow rise of water level at bottom of Halema‘uma‘u
November 21, 2019

Continued slow rise of water level at bottom of Halema‘uma‘u, November

Photos taken two weeks apart show the rise of water in Halema‘uma‘u. A white arrow denotes a large rock along the edge of the lake for comparing water levels in the two images. The water continues to rise at a rate of approximately 15 cm (6 in) per day. USGS photos by M. Patrick.

Five glass beakers on a lab table
October 30, 2019

Water collected from the lake at the bottom of Halema‘uma‘u

Water collected from the lake at the bottom of Halema‘uma‘u is prepared for laboratory analyses at the USGS California Volcano Observatory. Results thus far reveal chemistry indicative of complex reactions among the water, magmatic gases and Kīlauea's basaltic rocks. 

October 26, 2019

Reconnaissance video taken prior to October 26 water sampling mission

Prior to the Unoccupied Aircraft System (UAS) mission that collected a water sample from Halema‘uma‘u at Kīlauea's summit on October 26, reconnaissance UAS missions were flown. This video, taken over a period of 15 minutes, has been sped up 7 times to show the UAS as it approaches Halema‘uma‘u from the southwest. The UAS reaches the northeast portion of the lake, surveys

October 26, 2019

Reconnaissance video taken prior to October 26 water sampling mission

The Unoccupied Aircraft System (UAS) that collected water from the crater lake in Halema‘uma‘u on October 26 was outfitted with both visual and infrared (thermal) cameras. This reconnaissance video shows fumarolic activity on the walls of the crater. Fumaroles appear light in color (yellow and white) in the visual imagery due to alteration of the crater wall rock. In the

Filter Total Items: 2,079
What does water in Halema‘uma‘u mean
August 15, 2019

The slowly deepening pond of water on the floor of Halema‘uma‘u, the first in recorded history, has captured the interest of media and the public, both locally and nationally. Many questions are being asked. The two most frequent are, where is the water coming from and what is its importance?

HVO now tracking ponds of water, not lava, at Kīlauea's summit
August 8, 2019

The recent appearance of water at the bottom of Halema‘uma‘u, a crater at the summit of Kīlauea Volcano, has attracted wide attention and generated many questions. To understand the significance of this water, we must first gather accurate information on its behavior.

Aerial view of Halema‘uma‘u at the summit of Kīlauea
August 1, 2019

USGS Hawaiian Volcano Observatory (HVO) scientists usually base their research on observations, either visual or instrumental. Interpretations come from these observations, so they must be as good as possible. Incorrect observations can, and have, led to erroneous interpretations. 

panoramic view of the 1935 Humu‘ula flow
July 25, 2019

In ongoing media coverage of demonstrations at the base of Mauna Kea, many hundreds of people can be seen standing on a black lava flow that surrounds the Pu‘uhuluhulu Native Tree Sanctuary adjacent to the Daniel K. Inouye Highway. That same lava flow continues on the other side of the highway, which traverses the saddle between Mauna Loa and Mauna Kea.

USGS
July 25, 2019

HVO seismologist Brian Shiro discusses similarities and differences between the 2018 Hawai‘i and 2019 California earthquake sequences.

Preview image for Routine overflight of Mauna Loa summit video.
July 19, 2019

Video shows Moku‘āweoweo, the caldera at the summit of Mauna Loa, during a routine overflight. 

residual heat, steam, and small amounts of other gases continue to escape
July 18, 2019

One year ago, activity on Kīlauea Volcano was remarkably different than it is today. Lava was flowing toward the sea, robust ocean entry plumes were fumigating coastal areas, and island air quality was impacted by huge amounts of volcanic gases and particles.

USGS
July 12, 2019

On July 2, HVO raised the Volcano Alert Level for Mauna Loa from "Normal" to "Advisory".

eruptive fissures along the Northeast Rift Zone of Mauna Loa
July 11, 2019

Shortly before midnight on July 5, 1975, Mauna Loa Volcano awakened with a shudder. Quickly responding to a seismic earthquake/tremor alarm at 11:18 p.m., USGS Hawaiian Volcano Observatory (HVO) staff rushed to their offices, where, at 11:42 p.m., they noted red glow above the mountain. The 1975 eruption lasted less than a day, but it ended Mauna Loa's then longest-known repose period. 

Volcano Alert Levels
July 3, 2019

Hawaii residents are likely familiar with the Volcano Activity Updates that the Hawaiian Volcano Observatory (HVO) issues for Kīlauea and other active Hawaiian volcanoes. These updates, which provide situational awareness of volcanic activity and hazards, were formally established in 2006. 

Map showing the islands of Hawaii to show the areas where coral reefs are found.
July 1, 2019

A new USGS Open-File Report describes the coral reefs of Maui, Moloka‘i, Lānaʻi, and Kahoʻolawe in detail, including location, extent, coral cover, and connectivity.

Lava fountains erupting from fissure 22
June 27, 2019

Kīlauea Volcano, on the Island of Hawai‘i, has two rift zones. The East Rift Zone is longer, with 50 km (about 31 miles) on land plus another 80 km (about 43 miles) below sea level. The Southwest Rift Zone, which is historically less active, is 40 km (about 20 miles) long with only a small portion underwater.