- Info & Contacts
The Global Volcanism Program has no activity reports for Pavlof Sister.
The Global Volcanism Program has no Weekly Reports available for Pavlof Sister.
The Global Volcanism Program has no Bulletin Reports available for Pavlof Sister.
The Global Volcanism Program has no synonyms or subfeatures listed for Pavlof Sister.
The Global Volcanism Program is not aware of any Holocene eruptions from Pavlof Sister. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Pavlof Sister page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
There is no Deformation History data available for Pavlof Sister.
There is no Emissions History data available for Pavlof Sister.
|An ash plume trails to the south in mid-July 1986, 3 months after the start of an eruption of Pavlof that lasted nearly 2 1/2 years. This photo was taken from the west on a fishing boat in Pavlof Bay, with Pavlof Sister to the right. The 1986-88 eruption produced intermittent ashfalls and lava flows from two vents near the summit, one halfway down the SE flank, and another 600 m below the summit on the NE flank. Lava flows traveled to the north, NE, SE, ESE, and SSE, the latter to within 600 m of the Pavlof Bay shoreline.
Photo by Richard Mack, 1986.
|The twin volcanoes of Pavlof (left) and Pavlof Sister (right) rise to 2519 m and 2142 m, respectively. This January 20, 1987, view from the SW shows steam clouds rising along the length of a lava flow descending a prominent gully on the SE (right-hand) flank of Pavlof volcano. Recent snowfall covers ashfall that frequently dusted its slopes. This eruption began with explosive activity on April 16, 1986, and continued until August 13, 1988. Lava flows traveled down the north, NE, SE, ESE, and SSE flanks, the latter reaching to within 600 m of Pavlof Bay.
Photo by Jerry Chisum (Mark Air), 1987 (courtesy of John Reeder, Alaska Div. Geology Geophysical Surveys).
|The summits of the twin volcanoes of Pavlof Sister (left) and Pavlof (right) rise to 2142 m and 2519 m, respectively, above a low, roughly 1100-m-high saddle. They are viewed here in 1975 from lowlands to the NW. The somewhat less eroded Pavlof volcano, its slopes darkened by recent ashfalls, has been the source of frequent eruptions in historical time. Little Pavlof, a small satellitic volcano on the right flank of Pavlof, was also constructed along a line of vents trending NE from Emmons Lake caldera.
Photo by Tom Miller, 1975 (U.S. Geological Survey, Alaska Volcano Observatory).
|Pavlof volcano, rising above low plains to its NW, is one of Alaska's most active volcanoes. It is part of a NNE-SSW-trending line of volcanoes near the tip of the Alaskan Peninsula. The knob on the middle right horizon is Little Pavlof, a subsidiary peak of Pavlof. The low saddle at the left separates Pavlof from Pavlof Sister, whose lower flanks are seen at the extreme left.
Photo by Steve McNutt, 1979 (University of Alaska, Alaska Volcano Observatory).
|A small puff of dark ash rises from the summit crater of Pavlof volcano on May 28, 1960, as the detached plume from an earlier explosion drifts away to the east. Ash blankets the slopes of Pavlof in this view from the north. Mild ash eruptions took place from Pavlof from about 1960 to 1963, especially during July 1962 to June 1963. The sharp-topped peak at the left is snow-covered Pavlof Sister volcano, and Little Pavlof forms the smaller peak to the right of Pavlof.
Photo by Ken Morin, 1960 (courtesy of Bill Rose, Michigan Technological University).
There are no samples for Pavlof Sister in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.
|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 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.|
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Temporal Evolution of Unrest
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|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 Pavlof Sister||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).|
|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.|
|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).|