The Global Volcanism Program has no activity reports for Savai'i.
The Global Volcanism Program has no Weekly Reports available for Savai'i.
The Global Volcanism Program has no Bulletin Reports available for Savai'i.
This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.
|Feature Name||Feature Type||Elevation||Latitude||Longitude|
|Afutina||Cone||13° 39' 18" S||172° 13' 37" W|
|Anaota||Cone||13° 33' 0" S||172° 46' 23" W|
|Asi, Mount||Cone||13° 40' 0" S||172° 11' 10" W|
|Eleitoga||Cone||13° 36' 7" S||172° 38' 20" W|
|Fa'ani||Cone||13° 34' 52" S||172° 27' 18" W|
|Fagalo||Cone||13° 32' 31" S||172° 42' 18" W|
|Fogapoa||Cone||13° 40' 5" S||172° 11' 42" W|
|Fualua||Cone||13° 37' 55" S||172° 19' 5" W|
|Fui'avea||Lava cone||13° 32' 35" S||172° 23' 10" W|
|Mafane||Cone||13° 39' 25" S||172° 20' 31" W|
|Maga||Cone||13° 31' 23" S||172° 47' 49" W|
|Maile||Cone||13° 34' 1" S||172° 42' 29" W|
|Mana'omia||Cone||13° 38' 0" S||172° 23' 53" W|
|Masa||Cone||13° 38' 35" S||172° 14' 49" W|
|Mata'aga||Cone||13° 36' 11" S||172° 27' 7" W|
|Matafa||Cone||13° 37' 23" S||172° 19' 5" W|
|Mataulano||Pyroclastic cone||13° 37' 0" S||172° 20' 0" W|
|Matavanu||Cone||13° 31' 59" S||172° 24' 11" W|
|Pyroclastic cone||13° 36' 43" S||172° 31' 30" W|
|Mauga Silisili||Pyroclastic cone||13° 36' 29" S||172° 28' 26" W|
|Maugaloa||Pyroclastic cone||13° 33' 7" S||172° 25' 37" W|
|Mulimauga||Cone||13° 33' 11" S||172° 24' 18" W|
|Olomanu Tai||Cone||13° 38' 42" S||172° 17' 49" W|
|Olomanu Uta||Cone||13° 38' 42" S||172° 19' 1" W|
|Pule||Cone||13° 33' 47" S||172° 24' 54" W|
|Pulea||Cone||13° 33' 7" S||172° 44' 0" W|
|Puna||Cone||13° 34' 0" S||172° 19' 30" W|
|Saleleloga||Cone||13° 42' 47" S||172° 13' 41" W|
|Samau||Cone||13° 33' 0" S||172° 42' 11" W|
|Savai'i, Tafua||Tuff cone||13° 46' 55" S||172° 15' 11" W|
|Siope||Cone||13° 36' 47" S||172° 27' 18" W|
|Tagotala||Cone||13° 33' 47" S||172° 17' 31" W|
|Tapu'ele'ele||Cone||13° 37' 59" S||172° 14' 13" W|
|Te'elagi||Cone||13° 38' 13" S||172° 26' 0" W|
|To'iavea||Pyroclastic cone||13° 36' 18" S||172° 20' 53" W|
|Vaiala||Cone||13° 39' 43" S||172° 12' 25" W|
|Vaiolo||Cone||13° 40' 0" S||172° 13' 1" W|
|Ve'a||Cone||13° 37' 5" S||172° 19' 59" W|
|Feature Name||Feature Type||Elevation||Latitude||Longitude|
|Mata Ole Afi||Crater||13° 37' 0" S||172° 31' 1" W|
|Fissure vent||13° 36' 54" S||172° 34' 19" W|
There is data available for 12 Holocene eruptive periods.
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|1905 Aug 4||1911 Nov||Confirmed||2||Historical Observations||Matavanu (north flank 402 m)|
|1902 Oct 30||1902 Nov 17 ± 4 days||Confirmed||1||Historical Observations||Mata Ole Afi (1649 m)|
|1760||Unknown||Confirmed||2||Historical Observations||Mauga Afi (west-central Toasivi ridge)|
|1610 ± 200 years||Unknown||Confirmed||Radiocarbon (corrected)||Le'ele|
|1350 ± 50 years||Unknown||Confirmed||Radiocarbon (corrected)||Tafua Savai'i?|
|1310 ± 50 years||Unknown||Confirmed||Radiocarbon (corrected)|
|1240 ± 30 years||Unknown||Confirmed||Radiocarbon (corrected)|
|1040 ± 150 years||Unknown||Confirmed||Radiocarbon (corrected)|
|0170 ± 100 years||Unknown||Confirmed||Radiocarbon (corrected)|
|0480 BCE ± 300 years||Unknown||Confirmed||Radiocarbon (corrected)|
|1150 BCE ± 150 years||Unknown||Confirmed||Radiocarbon (corrected)|
|1990 BCE ± 150 years||Unknown||Confirmed||Radiocarbon (corrected)||North flank (Maugaloa)|
There is no Deformation History data available for Savai'i.
There is no Emissions History data available for Savai'i.
|Savai'i, the largest and highest of the Samoan islands, is shown in this NASA Landsat image (N is to the top). The 75-km-long island consists of a shield volcano constructed along a WNW-ESE-trending rift zone that splits into two rifts on the E side of the island. The broad crest contains numerous scoria cones, some of which were the source of historical eruptions that produced lava flows that reached the sea.
NASA Landsat7 image (worldwind.arc.nasa.gov)
|The 75-km-long island of Savai'i, the largest and highest of the Samoan islands, is a low-angle shield volcano. Numerous scoria cones dot the broad low-profile crest. The unvegetated lava flows in the foreground were emplaced during the most recent eruption in 1905.
Photo by Karoly Nemeth (Massey University).
|A major eruption of Savai'i took place from 4 August to November 1905. Voluminous lava flows from the Matavanu vent on the N flank flowed 12 km to sea, destroying several villages and many fields. This image shows a pressure ridge on the lava flow, with the N coast in the background.
Photo by Karoly Nemeth (Massey University).
The maps shown below have been scanned from the GVP map archives and include the volcano on this page. Clicking on the small images will load the full 300 dpi map. Very small-scale maps (such as world maps) are not included. The maps database originated over 30 years ago, but was only recently updated and connected to our main database. We welcome users to tell us if they see incorrect information or other problems with the maps; please use the Contact GVP link at the bottom of the page to send us email.
Title: Western Samoa
Publisher: US Central Intelligence Agency
Map Type: Geographic
Title: Tonga Region, Topo of
Publisher: USGS-CCOP/SOPAC S. Pacific Project
Map Type: Bathymetric
There are no samples for Savai'i in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.
|MIROVA||Middle InfraRed Observation of Volcanic Activity (MIROVA) is a near real time volcanic hot-spot detection system based on the analysis of MODIS (Moderate Resolution Imaging Spectroradiometer) data. In particular, MIROVA uses the Middle InfraRed Radiation (MIR), measured over target volcanoes, in order to detect, locate and measure the heat radiation sourced from volcanic activity.|
|MODVOLC Thermal Alerts||Using infrared satellite Moderate Resolution Imaging Spectroradiometer (MODIS) data, scientists at the Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, developed an automated system called MODVOLC to map thermal hot-spots in near real time. For each MODIS image, the algorithm automatically scans each 1 km pixel within it to check for high-temperature hot-spots. When one is found the date, time, location, and intensity are recorded. MODIS looks at every square km of the Earth every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows at least four hot-spot observations every two days. Each day updated global maps are compiled to display the locations of all hot spots detected in the previous 24 hours. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales.|
Sentinel Hub Playground
Sentinel Hub EO Browser
|The Sentinel Hub Playground provides a quick look at any Sentinel-2 image in any combination of the bands and enhanced with image effects; Landsat 8, DEM and MODIS are also available. Sentinel Hub is an engine for processing of petabytes of satellite data. It is opening the doors for machine learning and helping hundreds of application developers worldwide. It makes Sentinel, Landsat, and other Earth observation imagery easily accessible for browsing, visualization and analysis. Sentinel Hub is operated by Sinergise|
|IRIS seismic stations/networks||Incorporated Research Institutions for Seismology (IRIS) Data Services map showing the location of seismic stations from all available networks (permanent or temporary) within a radius of 0.18° (about 20 km at mid-latitudes) from the given location of Savai'i. Users can customize a variety of filters and options in the left panel. Note that if there are no stations are known the map will default to show the entire world with a "No data matched request" error notice.|
|UNAVCO GPS/GNSS stations||Geodetic Data Services map from UNAVCO showing the location of GPS/GNSS stations from all available networks (permanent or temporary) within a radius of 20 km from the given location of Savai'i. Users can customize the data search based on station or network names, location, and time window. Requires Adobe Flash Player.|
|DECADE Data||The DECADE portal, still in the developmental stage, serves as an example of the proposed interoperability between The Smithsonian Institution's Global Volcanism Program, the Mapping Gas Emissions (MaGa) Database, and the EarthChem Geochemical Portal. The Deep Earth Carbon Degassing (DECADE) initiative seeks to use new and established technologies to determine accurate global fluxes of volcanic CO2 to the atmosphere, but installing CO2 monitoring networks on 20 of the world's 150 most actively degassing volcanoes. The group uses related laboratory-based studies (direct gas sampling and analysis, melt inclusions) to provide new data for direct degassing of deep earth carbon to the atmosphere.|
Single Volcano View
Temporal Evolution of Unrest
Side by Side Volcanoes
|WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.|
|Large Eruptions of Savai'i||Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).|
|EarthChem||EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).|