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  • 46.47°N
  • 151.28°E

  • -502 m
    -1647 ft

  • 290160
  • Latitude
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  • Volcano

The Global Volcanism Program has no activity reports for Unnamed.

The Global Volcanism Program has no Weekly Reports available for Unnamed.

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.

05/1972 (CSLP 33-72) Submarine eruption from unknown source detected acoustically

Contents of Monthly Reports

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

All times are local (= UTC + 11 hours)

05/1972 (CSLP 33-72) Submarine eruption from unknown source detected acoustically

Card 1393 (19 May 1972) Submarine eruption from unknown source detected acoustically

"Seismic-type drum recordings of sound-power level at deep-ocean sound channel (SOFAR) hydrophones at Wake, Midway, and Oahu islands show a signal which I interpret to be from a shallow submarine eruption in the Kuril Islands, probably between Simushir Island and Urup Island. (The acoustic record is similar to that of the . . . Myojinsho eruption of 1970.) It began at 29 April 0830 UT and the major activity was over by 1930 UT although scattered events may have occurred for another day."

Information Contact: Roger A. Norris, Hawaii Institute of Geophysics, University of Hawaii.

Hydrophones detected signals in 1972 interpreted to be from a submarine eruption in the Kuriles, probably between Simushir and Urup Island (Smithsonian Institution Center for Short-Lived Phenomena). Three seamounts have been located between Urup and Simushir Islands, east and NE of Chirpoi Island (Tsvetkov 1991, pers. comm.), but the hydrophone signal is not accurately enough located to determine its precise origin. The location given here is arbitrarily that of the seamount most centrally located between Urup and Simushir Islands.

Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1972 Apr 29 1972 Apr 30 Confirmed 0 Hydrophonic

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

The Global Volcanism Program has no photographs available for Unnamed.

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.

Smithsonian Institution-CSLP, 1968-75. [Event notification cards]. Center for Short-Lived Phenomena (CSLP) Event Cards.

Tsvetkov A, 1991. . (pers. comm.).

Volcano Types


Tectonic Setting

Subduction zone
Oceanic crust (< 15 km)

Rock Types

No Data (checked)


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Affiliated Databases

Large Eruptions of Unnamed 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.