Cite this Report
Two previously unknown recent volcanoes identified
In January 1982, geologists from the Universidad de Chile found evidence of recent volcanism at two sites in the Seal Nunataks Group that had not previously been identified as recent volcanic centers. At Dallman (65.02°S, 60.32°W), very fresh-looking basaltic lava had emerged from the central crater and flowed to the NW foot of the volcano. Active fumaroles were observed at the N side of the summit. Abundant basaltic lapilli and ash covered wide areas of the Larsen Ice Shelf in the vicinity of Murdoch Volcano (65.03°S, 60.03°W). Portions of these deposits were covered by fresh snow. Fumaroles were active in a small parasitic cinder cone SE of Murdoch.
In December 1893, C.A. Larsen saw an eruption of black ash from Lindenberg (64.92°S, 59.70°W) and solfataric activity at Christensen (65.10°S, 59.57°W), but no activity was observed at either of these volcanoes in 1982.
Information Contacts: O. González-Ferrán, Univ. de Chile.
The Global Volcanism Program has no Weekly Reports available for Seal Nunataks Volcanic Field.
Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.
Cite this Report
Two previously unknown recent volcanoes identified
In January 1982, geologists from the Universidad de Chile found evidence of recent volcanism at two sites in the Seal Nunataks Group that had not previously been identified as recent volcanic centers. At Dallman (65.02°S, 60.32°W), very fresh-looking basaltic lava had emerged from the central crater and flowed to the NW foot of the volcano. Active fumaroles were observed at the N side of the summit. Abundant basaltic lapilli and ash covered wide areas of the Larsen Ice Shelf in the vicinity of Murdoch Volcano (65.03°S, 60.03°W). Portions of these deposits were covered by fresh snow. Fumaroles were active in a small parasitic cinder cone SE of Murdoch.
In December 1893, C.A. Larsen saw an eruption of black ash from Lindenberg (64.92°S, 59.70°W) and solfataric activity at Christensen (65.10°S, 59.57°W), but no activity was observed at either of these volcanoes in 1982.
Information Contacts: O. González-Ferrán, Univ. de Chile.
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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| Nunataks Foca | ||||
Cones |
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| Feature Name | Feature Type | Elevation | Latitude | Longitude |
| Akerlundh | Cone | 65° 3' 0" S | 60° 11' 0" W | |
| Arctowsky | Cone | 65° 6' 0" S | 60° 2' 0" W | |
| Bruce | Cone | 65° 5' 0" S | 60° 15' 0" W | |
| Bull | Cone | 65° 5' 0" S | 60° 25' 0" W | |
| Castor | Cone | 65° 10' 0" S | 59° 56' 0" W | |
| Christensen Nunatak | Cone | 65° 5' 0" S | 59° 35' 0" W | |
| Dalman | Cone | 65° 1' 0" S | 60° 19' 0" W | |
| Donald | Cone | 65° 5' 0" S | 60° 7' 0" W | |
| Evensen | Cone | 64° 59' 0" S | 60° 23' 0" W | |
| Gray | Cone | 65° 6' 0" S | 60° 6' 0" W | |
| Hertha | Cone | 65° 9' 0" S | 60° 0' 0" W | |
| Larsen | Cone | 64° 58' 0" S | 60° 5' 0" W | |
| Lindenberg Island | Cone | 64° 57' 0" S | 60° 5' 0" W | |
| Murdoch | Cone | 65° 2' 0" S | 60° 2' 0" W | |
| Oceana | Cone | 65° 8' 0" S | 59° 50' 0" W | |
| Pollux | Cone | 65° 5' 0" S | 59° 54' 0" W | |
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The Global Volcanism Program is not aware of any Holocene eruptions from Seal Nunataks Volcanic Field. If this volcano has had large eruptions (VEI >= 4) prior to 12,000 years ago, information might be found on the Seal Nunataks Volcanic Field 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 Seal Nunataks Volcanic Field.
There is no Emissions History data available for Seal Nunataks Volcanic Field.
Maps are not currently available due to technical issues.
There are no samples for Seal Nunataks Volcanic Field in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.
| 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. |
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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. |
| 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 Seal Nunataks Volcanic Field. 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 Seal Nunataks Volcanic Field. Users can customize the data search based on station or network names, location, and time window. Requires Adobe Flash Player. |
| Large Eruptions of Seal Nunataks Volcanic Field | 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). |
Murdoch Nunatak is one of a group of 16 nunataks (exposed ridges emerging from ice) in the Seal Nunataks Volcanic Field, on the east coast of northern Antarctic Peninsula. The collapse of the Larsen Ice shelf means that some nunataks can now be described as islands. Murdoch is the largest nunatak in the group, with a flat top and steep sides.
