The Global Volcanism Program has no activity reports available for Segula.
The Global Volcanism Program has no Weekly Reports available for Segula.
The Global Volcanism Program has no Bulletin Reports available for Segula.
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.
Synonyms |
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The Global Volcanism Program is not aware of any Holocene eruptions from Segula. If this volcano has had large eruptions (VEI >= 4) prior to 12,000 years ago, information might be found on the Segula 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 Segula.
There is no Emissions History data available for Segula.
A prominent N-S-trending fissure that extends to sea level at both ends across Segula, located near the western end of the Aleutian Arc. The irregular topography on the N side of the island is an extensive lava field that erupted from the summit crater along the NE flank to the coast. A smaller lava field to the lower right originated from a scoria cone on the lower SE flank. A scoria cone constructed along the S rim of a small caldera forms the high point of the island.
The view WNW from the western side of Little Sitkin Island includes the broad Davidof island, part of the rim of a largely submerged caldera across the right-center. The snow-capped peak behind Davidof is Segula volcano. In the background to the far left is the Kiska volcano.
The 6 x 7 km Segula island is seen offshore from the SW. It has a prominent NNW-SSE-trending fissure that extends to sea level at both ends of the island. The summit contains a small, poorly defined caldera that has a scoria cone forming the high point of the island. Maps are not currently available due to technical issues.
The following 44 samples associated with this volcano can be found in the Smithsonian's NMNH Department of Mineral Sciences collections, and may be availble for research (contact the Rock and Ore Collections Manager). Catalog number links will open a window with more information.
| Catalog Number | Sample Description | Lava Source | Collection Date |
|---|---|---|---|
| NMNH 118207-1 | Breccia | -- | 8 Sep 2015 |
| NMNH 118207-10 | Volcanic Ash | -- | 8 Sep 2015 |
| NMNH 118207-11 | Basaltic andesite scoria | -- | 8 Sep 2015 |
| NMNH 118207-12 | Andesite debris flow | -- | 8 Sep 2015 |
| NMNH 118207-13 | Basaltic andesite lapilli tephra | -- | 8 Sep 2015 |
| NMNH 118207-14 | Debris flow | -- | 8 Sep 2015 |
| NMNH 118207-15 | Debris flow | -- | 8 Sep 2015 |
| NMNH 118207-16 | Debris flow | -- | 9 Sep 2015 |
| NMNH 118207-17 | Soil | -- | 9 Sep 2015 |
| NMNH 118207-18 | Debris flow | -- | 9 Sep 2015 |
| NMNH 118207-19 | Soil | -- | 9 Sep 2015 |
| NMNH 118207-2 | Breccia | -- | 8 Sep 2015 |
| NMNH 118207-20 | Debris flow | -- | 9 Sep 2015 |
| NMNH 118207-21 | Scoria | -- | 11 Sep 2015 |
| NMNH 118207-22 | Basalt | -- | 11 Sep 2015 |
| NMNH 118207-23 | Scoria | -- | 11 Sep 2015 |
| NMNH 118207-24 | Andesite debris flow | -- | 11 Sep 2015 |
| NMNH 118207-25 | Debris flow | -- | 11 Sep 2015 |
| NMNH 118207-26 | Basalt | -- | 11 Sep 2015 |
| NMNH 118207-27 | Basalt | -- | 11 Sep 2015 |
| NMNH 118207-28 | Basalt | -- | 11 Sep 2015 |
| NMNH 118207-29 | Basalt | -- | 11 Sep 2015 |
| NMNH 118207-3 | Andesite | -- | 8 Sep 2015 |
| NMNH 118207-30 | Basaltic Andesite | -- | 11 Sep 2015 |
| NMNH 118207-31 | Basalt | -- | 11 Sep 2015 |
| NMNH 118207-32 | Basaltic Andesite | -- | 11 Sep 2015 |
| NMNH 118207-33 | Volcanic Breccia | -- | 11 Sep 2015 |
| NMNH 118207-34 | Lapilli tephra | -- | 11 Sep 2015 |
| NMNH 118207-35 | Basaltic Andesite | -- | 8 Sep 2015 |
| NMNH 118207-36 | Basalt | -- | 8 Sep 2015 |
| NMNH 118207-37 | Andesite | -- | 8 Sep 2015 |
| NMNH 118207-38 | Basalt | -- | 8 Sep 2015 |
| NMNH 118207-39 | Andesite | -- | 8 Sep 2015 |
| NMNH 118207-4 | Soil | -- | 8 Sep 2015 |
| NMNH 118207-40 | Basalt | -- | 8 Sep 2015 |
| NMNH 118207-41 | Dacite debris flow | -- | 9 Sep 2015 |
| NMNH 118207-42 | Dacite debris flow | -- | 9 Sep 2015 |
| NMNH 118207-43 | Andesite debris flow | -- | 9 Sep 2015 |
| NMNH 118207-44 | Basaltic Andesite | -- | 11 Sep 2015 |
| NMNH 118207-5 | Lapilli tephra | -- | 8 Sep 2015 |
| NMNH 118207-6 | Debris flow | -- | 8 Sep 2015 |
| NMNH 118207-7 | Debris flow | -- | 8 Sep 2015 |
| NMNH 118207-8 | Basalt lapilli tephra | -- | 8 Sep 2015 |
| NMNH 118207-9 | Basaltic andesite lapilli tephra | -- | 8 Sep 2015 |
| Alaska Volcano Observatory (Link to Segula) | The Alaska Volcano Observatory (AVO) is a joint program of the U.S. Geological Survey (USGS), the Geophysical Institute of the University of Alaska Fairbanks (UAFGI), and the State of Alaska Division of Geological and Geophysical Surveys (ADGGS). AVO was formed in 1988, and uses federal, state, and university resources to monitor and study Alaska's hazardous volcanoes, to predict and record eruptive activity, and to mitigate volcanic hazards to life and property. |
| Copernicus Browser | The Copernicus Browser replaced the Sentinel Hub Playground browser in 2023, to provide access to Earth observation archives from the Copernicus Data Space Ecosystem, the main distribution platform for data from the EU Copernicus missions. |
| 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. |
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WOVOdat
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.
GVMID Data on Volcano Monitoring Infrastructure The Global Volcano Monitoring Infrastructure Database GVMID, is aimed at documenting and improving capabilities of volcano monitoring from the ground and space. GVMID should provide a snapshot and baseline view of the techniques and instrumentation that are in place at various volcanoes, which can be use by volcano observatories as reference to setup new monitoring system or improving networks at a specific volcano. These data will allow identification of what monitoring gaps exist, which can be then targeted by remote sensing infrastructure and future instrument deployments. |
| Volcanic Hazard Maps | The IAVCEI Commission on Volcanic Hazards and Risk has a Volcanic Hazard Maps database designed to serve as a resource for hazard mappers (or other interested parties) to explore how common issues in hazard map development have been addressed at different volcanoes, in different countries, for different hazards, and for different intended audiences. In addition to the comprehensive, searchable Volcanic Hazard Maps Database, this website contains information about diversity of volcanic hazard maps, illustrated using examples from the database. This site is for educational purposes related to volcanic hazard maps. Hazard maps found on this website should not be used for emergency purposes. For the most recent, official hazard map for a particular volcano, please seek out the proper institutional authorities on the matter. |
| 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 Segula. 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 Segula. 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. |
| Large Eruptions of Segula | 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). |
