Siple

Photo of this volcano
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  • Antarctica
  • Antarctica
  • Shield
  • Unknown - Uncertain Evidence
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 73.43°S
  • 126.67°W

  • 3110 m
    10201 ft

  • 390025
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

20 June-26 June 2012

Infrared imagery from the Metop satellite showed a possible rising steam plume from the area of Siple on 20 June. The imagery, as interpreted by Mark Drapes, indicated that the volcano was about -22 degrees Celsius, about 6 degrees warmer that the surrounding landscape, and the base of the plume was about -55 degrees Celsius. [Correction: Further investigation and/or analysis of satellite imagery by Philip Kyle (New Mexico Institute of Mining and Technology), Paul Morin (University of Minnesota), and Matthew Lazzara (University of Wisconsin) confirmed that an eruption did not occur.]

Sources: EUMETSAT, Mark Drapes

Index of Weekly Reports


2012: June

Weekly Reports


20 June-26 June 2012

Infrared imagery from the Metop satellite showed a possible rising steam plume from the area of Siple on 20 June. The imagery, as interpreted by Mark Drapes, indicated that the volcano was about -22 degrees Celsius, about 6 degrees warmer that the surrounding landscape, and the base of the plume was about -55 degrees Celsius. [Correction: Further investigation and/or analysis of satellite imagery by Philip Kyle (New Mexico Institute of Mining and Technology), Paul Morin (University of Minnesota), and Matthew Lazzara (University of Wisconsin) confirmed that an eruption did not occur.]

Sources: EUMETSAT; Mark Drapes


Index of Monthly Reports

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.

09/1988 (SEAN 13:09) Apparent ash plumes detected by satellite imagery

12/1988 (SEAN 13:12) Overflight shows no sign of recent eruption

02/1992 (Unpub 1992) No evidence of activity


Contents of Monthly Reports

All information contained in these reports is preliminary and subject to change.

All times are UTC

09/1988 (SEAN 13:09) Apparent ash plumes detected by satellite imagery

Apparent ash plumes from Mt. Siple were detected by NOAA 10 satellite imagery (visible band, orbit 10406) on 18 September at 1301 and again on 4 October at 1534 (infrared and visible bands, orbit 10636). The 4 October plume extended ~160-170 km WNW and was well-defined, but it was uncertain whether the plume originated from the volcano's summit or base [but see 13:12]. A review of past LANDSAT images indicated a possible February 1988 ash deposit on the ice near the volcano. Michael Matson and George Stephens are currently applying additional satellite data aquisition and reduction techniques to refine these interpretations.

. . . Geologists hope to visit the volcano in November.

Information Contacts: W. Gould, M. Matson, and G. Stephens, NOAA; W. LeMasurier, Univ of Colorado.

12/1988 (SEAN 13:12) Overflight shows no sign of recent eruption

Further analysis of satellite images by geologists strongly suggested that the plumes originated from the volcano's summit, rather than its base. On 30 December, Philip Kyle and William McIntosh conducted an aerial inspection of the snow-covered volcano. The weather was clear except for low clouds below 500 m, around the mountain's base. No fresh ash, new craters, disruptions to the snowpack, or other evidence of recent explosive volcanism were observed. Although appearing identical to known eruption clouds, Kyle believes that the Mt. Siple plumes resulted from meteorological effects.

Information Contacts: P. Kyle, New Mexico Institute of Mining & Technology.

02/1992 (Unpub 1992) No evidence of activity

[A 25 February 1992 overflight during clear weather by a U.S. Coast Guard helicopter revealed no evidence of activity at Mt. Siple. No ash was visible on the surface, and no active fumaroles or fumarolic ice towers could be seen.]

Information Contacts: P. Kyle, New Mexico Institute of Mining & Technology.

Mount Siple is a youthful-looking shield volcano that forms an island along the Pacific Ocean coast of Antarctica's Marie Byrd Land. The massive 1800 cu km volcano is truncated by a 4-5 km summit caldera and is ringed by tuff cones at sea level. Its lack of dissection in a coastal area more susceptible to erosion than inland Antarctic volcanoes, and the existence of a satellite cone too young to date by the Potassium-Argon method, suggest a possible Holocene age (LeMasurier and Thomson 1990). The location of Mount Siple on published maps is 26 km NE of the actual location. A possible eruption cloud observed on satellite images on September 18 and October 4, 1988 was considered to result from atmospheric effects after low-level aerial observations revealed no evidence of recent eruptions (Smithsonian Scientific Event Alert Network Bulletin).

The Global Volcanism Program is not aware of any Holocene eruptions from Siple. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Siple page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

The Global Volcanism Program has no synonyms or subfeatures listed for Siple.

Mount Siple rises to 3110 m and forms the high point of Siple Island in Marie Byrd Land off the coast of Antarctica. This aerial view is from the west, with dark-colored open water in the foreground and pack-ice-filled Pankratz Bay at the far right. Mount Siple has the largest exposed volume of volcanoes in this part of Antarctica because it lies outside the continental ice sheet. The exposed rock surface along the coast to the right of center is the young satellitic tuff cone of Lovill Bluff.

U. S. Navy photo TMA 1627 F33 088, 1985.

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.

Dort W, 1972. Late Cenozoic volcanism in Antarctica. In: Adie R J (ed) {Antarctic Geol and Geophys}, IUGS Ser-B(1): 645-652.

LeMasurier W E, Thomson J W (eds), 1990. Volcanoes of the Antarctic Plate and Southern Oceans. Washington, D C: Amer Geophys Union, 487 p.

Smithsonian Institution-SEAN, 1975-89. [Monthly event reports]. Bull Scientific Event Alert Network (SEAN), v 1-14.

Volcano Types

Shield
Tuff cone(s)

Tectonic Setting

Intraplate
Continental crust (> 25 km)

Rock Types

Major
Basalt / Picro-Basalt

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
0
0
0
0

Affiliated Databases

Large Eruptions of Siple 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).
WOVOdat 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.
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).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.