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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: November 18, 2009

Waves of Survival in American Samoa

Pete Gurr, a resident of American Samoa, was on his way to work when he felt an earthquake that originated 110 miles out at sea. Because of tsunami training he had received, he knew about the possibility of a deadly wave and drove down to the closest coastal village, where he warned the residents. Similarly, Tina Pule knew the earthquake was stronger than usual and told her parents to go inland.

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USGS scientist collects thermal images with camera next to a lagoon in US Samoa
Date Published: February 23, 2019
Status: Completed

Thermal Imaging Camera Use: Identifying Groundwater Inputs to a Reef in American Samoa

USGS scientists used a thermal camera in American Samoa to understand the effect of land-based contaminants on an adjacent coral reef lagoon ecosystem. The infrared (IR) camera was used to capture thermal images of the lagoon to look for temperature differences to understand the distribution of freshwater entering the lagoon and the circulation of the lagoon water at various tidal levels.

Attribution: Water Resources
Brown treesnake in Guam, a composite image of a snake crawling by the beach.
Date Published: January 1, 2012
Status: Completed

21st Century High-Resolution Climate Projections for Guam and American Samoa

While home to many people and a rich diversity of unique plant and animal life, the U.S. territories of Guam and American Samoa are especially vulnerable to the effects of climate change because of their small size, geographical remoteness, and exposure to threats such as sea-level rise and increased storm surge. Developing predictions of future conditions is often the first step in helping...

Filter Total Items: 22
USGS
January 1, 2019

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 Territory of Puerto Rico (the islands of Culebra, Puerto Rico, and Vieques). For each island there are 8 associated flood mask and flood depth shapefiles: one for each four nearshore wave energy return periods (r

USGS
January 1, 2019

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 each of four nearshore wave

USGS
January 1, 2019

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 American Samoa (the islands of Tutuila, Ofu-Olosega, and Tau). For each island there are 8 associated flood mask and flood depth shapefiles: one for each of four nearshore wave energy return periods (rp; 10-, 50-, 10

Map of the Pacific Ocean and surrounding continents with boxes drawn around areas to show study locations.
January 1, 2019

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 associated flood mask

USGS
August 22, 2018

This dataset contains American Samoa nonresidence count estimates as a function of travel time out of the 2009 and probable maximum tsunami (PMT) inundation zones for four different travel speeds (slow walk, fast walk, slow run, and fast run). The data are organized in a manner which permits summarizing or visualizing the data by business classification (church, community center, education, healt

USGS
August 22, 2018

This dataset contains American Samoa resident count estimates as a function of travel time out of the 2009 and probable maximum tsunami (PMT) inundation zones for four different travel speeds (slow walk, fast walk, slow run, and fast run). The data are organized in a manner which permits summarizing or visualizing the data by village, tsunami-evacuation zone, and/or travel time, with individual r

USGS
August 22, 2018

This data release is comprised of a set of eight time travel map shapefiles (two tsunami inundation zones and four travel times) for use in GIS software applications and two population exposure by travel time tables (residents and nonresidences) for use in GIS software applications and other standalone spreadsheet applications. The travel time map was generated using the Pedestrian Evacuation An

USGS
August 20, 2018

The travel time map was generated using the Pedestrian Evacuation Analyst model (version 1.0.1 for ArcGIS 10.5) from the USGS (https://geography.wr.usgs.gov/science/vulnerability/tools.html). The travel time analysis uses ESRI's Path Distance tool to find the shortest distance across a cost surface from any point in the hazard zone to a safe zone. This cost analysis considers the direction of mov

USGS
August 20, 2018

The travel time map was generated using the Pedestrian Evacuation Analyst model (version 1.0.1 for ArcGIS 10.5) from the USGS (https://geography.wr.usgs.gov/science/vulnerability/tools.html). The travel time analysis uses ESRI's Path Distance tool to find the shortest distance across a cost surface from any point in the hazard zone to a safe zone. This cost analysis considers the direction of mov

USGS
August 20, 2018

The travel time map was generated using the Pedestrian Evacuation Analyst model (version 1.0.1 for ArcGIS 10.5) from the USGS (https://geography.wr.usgs.gov/science/vulnerability/tools.html). The travel time analysis uses ESRI's Path Distance tool to find the shortest distance across a cost surface from any point in the hazard zone to a safe zone. This cost analysis considers the direction of mov

USGS
August 20, 2018

The travel time map was generated using the Pedestrian Evacuation Analyst model (version 1.0.1 for ArcGIS 10.5) from the USGS (https://geography.wr.usgs.gov/science/vulnerability/tools.html). The travel time analysis uses ESRI's Path Distance tool to find the shortest distance across a cost surface from any point in the hazard zone to a safe zone. This cost analysis considers the direction of mov

USGS
August 20, 2018

The travel time map was generated using the Pedestrian Evacuation Analyst model (version 1.0.1 for ArcGIS 10.5) from the USGS (https://geography.wr.usgs.gov/science/vulnerability/tools.html). The travel time analysis uses ESRI's Path Distance tool to find the shortest distance across a cost surface from any point in the hazard zone to a safe zone. This cost analysis considers the direction of mov

Filter Total Items: 13
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Year Published: 2017

Coastal circulation and water-column properties in the National Park of American Samoa, February–July 2015

There is little information on the oceanography in the National Park of American Samoa (NPSA). The transport pathways for potentially harmful constituents of land-derived runoff, as well as larvae and other planktonic organisms, are driven by nearshore circulation patterns. To evaluate the processes affecting coral reef ecosystem health, it is...

Storlazzi, Curt D.; Cheriton, Olivia; Rosenberger, Kurt J.; Logan, Joshua B.; Clark, Timothy B.
Storlazzi, C.D., Cheriton, O.M., Rosenberger, K.J., Logan, J.B., and Clark, T.B., 2017, Coastal circulation and water-column properties in the National Park of American Samoa, February–July 2015: U.S. Geological Survey Open-File Report 2017–1060, 104 p., https://doi.org/10.3133/ofr20171060.

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Year Published: 2016

Effects of Climate and land use on diversity, prevalence, and seasonal transmission of avian hematozoa in American Samoa

The indigenous forest birds of American Samoa are increasingly threatened by changing patterns of rainfall and temperature that are associated with climate change as well as environmental stressors associated with agricultural and urban development, invasive species, and new introductions of avian diseases and disease vectors. Long term changes in...

Atkinson, Carter T.; Utuzurrum, Ruth B.; Seamon, Joshua O.; Schmaedick, Mark A.; Lapointe, Dennis; Apelgren, Chloe; Egan, Ariel N.; Watcher-Weatherwax, William
Atkinson, C.T., R.B. Utzurrum, J. O. Seamon, M.A. Schmaedick, D.A. LaPointe, C. Apelgren, A.N. Egan, and W. Watcher-Weatherwax. 2016. Effects of Climate and land use on diversity, prevalence, and seasonal transmission of avian hematozoa in American Samoa. Hawaii Cooperative Studies Unit Technical Report. TR HCSU-072. University of Hawaii at Hilo, 52 pp.

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Year Published: 2015

Ants of the national park of American Samoa

American Samoa makes up the eastern end of the Samoan Archipelago. On the islands of Tutuila, Taʽū and Ofu, the National Park of American Samoa (NPSA) protects about 4,000 ha of coastal, mid-slope and ridge-top forest. While the ant fauna of the Samoan Archipelago is considered relatively well documented, much of NPSA has never been surveyed for...

Banko, Paul C.; Peck, Robert W.
Peck, R.W. and P.C. Banko. 2015. Ants of the National Park of American Samoa. Hawaii Cooperative Studies Unit Technical Report. TR HCSU-0061. University of Hawaii at Hilo, 46 pp.

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Year Published: 2012

Bacterial communities associated with healthy and Acropora white syndrome-affected corals from American Samoa

Acropora white syndrome (AWS) is characterized by rapid tissue loss revealing the white underlying skeleton and affects corals worldwide; however, reports of causal agents are conflicting. Samples were collected from healthy and diseased corals and seawater around American Samoa and bacteria associated with AWS characterized using both culture-...

Wilson, Bryan; Aeby, Greta S.; Work, Thierry M.; Bourne, David G.
Bacterial communities associated with healthy and Acropora white syndrome-affected corals from American Samoa; 2012; Article; Journal; FEMS Microbiology Ecology; Wilson, Bryan ; Aeby, Greta S.; Work, Thierry M.; Bourne, David G.

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Year Published: 2011

Coral diversity and the severity of disease outbreaks: a cross-regional comparison of Acropora white syndrome in a species-rich region (American Samoa) with a species-poor region (Northwestern Hawaiian Islands).

The dynamics of the coral disease, Acropora white syndrome (AWS), was directly compared on reefs in the species-poor region of the Northwestern Hawaiian Islands (NWHI) and the species-rich region of American Samoa (AS) with results suggesting that biodiversity, which can affect the abundance of susceptible hosts, is important in influencing the...

Aeby, G.S.; Bourne, D.G.; Wilson, B.; Work, Thierry M.
Coral diversity and the severity of disease outbreaks: a cross-regional comparison of Acropora white syndrome in a species-rich region (American Samoa) with a species-poor region (Northwestern Hawaiian Islands).; 2011; Article; Journal; Journal of Marine Biology; Aeby, G. S.; Bourne, D. G.; Wilson, B. ; Work, Thierry M.

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Year Published: 2011

Effects of fringing reefs on tsunami inundation: American Samoa

A numerical model of tsunami inundation, Delft3D, which has been validated for the 29 September 2009 tsunami in Tutuila, American Samoa, is used to better understand the impact of fringing coral reefs and embayments on tsunami wave heights, inundation distances, and velocities. The inundation model is used to explore the general conditions under...

Gelfenbaum, G.; Apotsos, A.; Stevens, A.W.; Jaffe, B.
Effects of fringing reefs on tsunami inundation: American Samoa; 2011; Article; Journal; Earth-Science Reviews; Gelfenbaum, G.; Apotsos, A.; Stevens, A. W.; Jaffe, B.

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Year Published: 2008

Coral and crustose coralline algae disease on the reefs of American Samoa

Surveys for lesions in corals were conducted at seven sites around Tutuila in June 2004 and January 2005. The objectives of the study were to document the distribution and prevalence of disease in the major genera of corals and crustose coralline algae, systematically describe gross and microscopic morphology of lesions in reef corals and...

Aeby, G.; Work, Thierry M.; Fenner, D.; DiDonato, Eva

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Year Published: 2007

Areas Contributing Recharge to Wells in the Tafuna-Leone Plain, Tutuila, American Samoa

To address the concerns about the potential for contamination of drinking-water wells in the Tafuna-Leone Plain, Tutuila, American Samoa, a numerical ground-water flow model was developed and used to delineate areas contributing recharge to the wells (ACRWs). Surveys and analyses were conducted to obtain or compile certain essential hydrogeologic...

Izuka, Scot K.; Perreault, Jeff A.; Presley, Todd K.
Areas Contributing Recharge to Wells in the Tafuna-Leone Plain, Tutuila, American Samoa; 2007; SIR; 2007-5167; Izuka, Scot K.; Perreault, Jeff A.; Presley, Todd K.

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Year Published: 2005

Characterizing lesions in corals from American Samoa

The study of coral disease has suffered from an absence of systematic approaches that are commonly used to determine causes of diseases in animals. There is a critical need to develop a standardized and portable nomenclature for coral lesions in the field and to incorporate more commonly available biomedical tools in coral disease surveys to...

Work, Thierry M.; Rameyer, Robert A.

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Year Published: 2004

A new coccidian parasite, Isospora samoaensis, from the Wattled Honeyeater (Foulehaio carunculata) from American Samoa

A new species of Isospora is described from the feces of the wattled honeyeater, Foulehaio carunculata from American Samoa. Numerous oocysts of similar morphology were found in a single adult wattled honeyeater. Sporulated oocysts are ovoid, 28.9 × 26.1 (25-32 × 23-30) µm, with a smooth, colorless, bilayered wall; the inner wall is slightly...

Adamczyk, Kelly J.; McQuistion, Thomas E.; LaPointe, Dennis

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Year Published: 2003

Detection of avian malaria (Plasmodium spp.) in native land birds of American Samoa

This study documents the presence of Plasmodium spp. in landbirds of central Polynesia. Blood samples collected from eight native and introduced species from the island of Tutuila, American Samoa were evaluated for the presence of Plasmodium spp. by nested rDNA PCR, serology and/or microscopy. A total of 111/188 birds (59%) screened by nested PCR...

Jarvi, S.I.; Farias, M.E.M.; Baker, H.; Freifeld, H.B.; Baker, P.E.; Van Gelder, E.; Massey, J.G.; Atkinson, C.T.
Detection of avian malaria (Plasmodium spp.) in native land birds of American Samoa; 2003; Article; Journal; Conservation Genetics; Jarvi, S. I.; Farias, M. E. M.; Baker, H.; Freifeld, H. B.; Baker, P. E.; Van Gelder, E.; Massey, J. G.; Atkinson, C. T.

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Year Published: 1995

Analysis of streamflow characteristics for streams on the island of Tutuila, American Samoa

Several methods for estimating streamflow characteristics for low and peak flows for streams on Tutuila, American Samoa are presented. These methods, derived from frequency, flow-duration, and regression analyses, allow the user to compute estimates for the 7-day low flow with 2-year and 10-year recurrence intervals; the median flow; the mean flow...

Wong, Michael F.
Analysis of streamflow characteristics for streams on the island of Tutuila, American Samoa; 1995; WRI; 95-4185; Wong, M. F.

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USGS science for a changing world logo
November 18, 2009

Pete Gurr, a resident of American Samoa, was on his way to work when he felt an earthquake that originated 110 miles out at sea. Because of tsunami training he had received, he knew about the possibility of a deadly wave and drove down to the closest coastal village, where he warned the residents. Similarly, Tina Pule knew the earthquake was stronger than usual and told her parents to go inland.