Sumisujima

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 31.44°N
  • 140.051°E

  • 136 m
    446 ft

  • 284080
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Bulletin Report: October 1992 (BVE 32)


Discolored water with sulfur odor reported by fishing boat

[The following provides additional information about the 7 October 1992 observation.]

"Shira-ne, a small rock mass of two pyroxene andesite 7.7 m below sea level, located about 7.5 km NE of Smith Rocks and about 500 km S of Tokyo, forms an E part of a submarine caldera about 8 km in diameter (figure 1). Smith Rocks, 136 m a.s.l., forming S rim of the caldera are of olivine basalt.

Figure (see Caption) Figure 1. Submarine topography of Shira-ne and nearby area.

"On October 7, 1992, yellow discolored water smelling sulfur was reported by a fishing boat, Daini-Odamaru, suggesting a submarine volcanic activity. The area of discoloration was 6 km long and 30 m wide."

"Reference: Hydrographic Department, Japan Maritime Safety Agency (1992): Recent activity of submarine volcanoes and volcanic islands. Rept. Coordinating Committee for Predication of Volcanic Eruption, No. 54, p. 77.

"(Communication from: H. Furukawa, Japan Maritime Safety Agency, Tsukiji 5-3-1, Chuo-ku, Tokyo 104, Japan.)"

Reference. Bulletin of Volcanic Eruptions, 1995, Annual Report of the World Volcanic Eruptions in 1992: Volcanological Society of Japan, no. 32, p. 134-135.

Information Contacts:

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

Bulletin Reports - Index


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.

10/1992 (BGVN 17:10) Small zone of discolored water

10/1992 (BVE 32) Discolored water with sulfur odor reported by fishing boat




Information is preliminary and subject to change. All times are local (unless otherwise noted)


October 1992 (BGVN 17:10) Citation IconCite this Report


Small zone of discolored water

A zone of discolored yellowish water 30 m [wide] and [6 km long] was observed by fishing crews at around 1100 on 7 October. A JMSA overflight on 9 October showed no anomaly. The volcano last erupted in 1916, ejecting tephra. Discoloration was seen at the shore and near the island in 1975, 1976, 1977, 1989, and August 1992.

Information Contacts: JMA; JMSA.


October 1992 (BVE 32)


Discolored water with sulfur odor reported by fishing boat

[The following provides additional information about the 7 October 1992 observation.]

"Shira-ne, a small rock mass of two pyroxene andesite 7.7 m below sea level, located about 7.5 km NE of Smith Rocks and about 500 km S of Tokyo, forms an E part of a submarine caldera about 8 km in diameter (figure 1). Smith Rocks, 136 m a.s.l., forming S rim of the caldera are of olivine basalt.

Figure (see Caption) Figure 1. Submarine topography of Shira-ne and nearby area.

"On October 7, 1992, yellow discolored water smelling sulfur was reported by a fishing boat, Daini-Odamaru, suggesting a submarine volcanic activity. The area of discoloration was 6 km long and 30 m wide."

"Reference: Hydrographic Department, Japan Maritime Safety Agency (1992): Recent activity of submarine volcanoes and volcanic islands. Rept. Coordinating Committee for Predication of Volcanic Eruption, No. 54, p. 77.

"(Communication from: H. Furukawa, Japan Maritime Safety Agency, Tsukiji 5-3-1, Chuo-ku, Tokyo 104, Japan.)"

Reference. Bulletin of Volcanic Eruptions, 1995, Annual Report of the World Volcanic Eruptions in 1992: Volcanological Society of Japan, no. 32, p. 134-135.

Information Contacts:

Eruptive History


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


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
[ 2005 Mar 8 ] [ 2005 Mar 8 ] Uncertain 0  
[ 2003 Nov 6 ] [ 2003 Nov 6 ] Uncertain 0  
[ 2002 Sep 4 ] [ 2002 Sep 4 ] Uncertain 0  
[ 2001 Oct 31 ] [ 2002 Feb 28 ] Uncertain 0  
[ 2000 Oct 30 ] [ 2000 Oct 30 ] Uncertain 0  
[ 1998 Oct 27 ] [ 1999 Jan 13 ] Uncertain 0  
[ 1997 Nov 21 ] [ 1997 Nov 21 ] Uncertain 0  
[ 1996 Jan 22 ] [ 1996 Jan 22 ] Uncertain 0  
[ 1995 Jul 5 ] [ 1995 Jul 7 ] Uncertain 0  
[ 1994 Jul 27 ] [ 1994 Jul 27 ] Uncertain 0  
[ 1994 Jan 17 ] [ 1994 Jan 17 ] Uncertain 0  
[ 1993 Sep 8 ] [ 1993 Sep 10 ] Uncertain 0  
[ 1992 Aug 5 ] [ 1992 Oct 7 ] Uncertain 0   Shirane (7.5 km NE of Smith Rocks)
[ 1991 Nov 5 ] [ 1991 Nov 5 ] Uncertain 0  
[ 1989 Jul 18 ] [ 1989 Jul 18 ] Uncertain 0  
[ 1989 Jan 18 ] [ 1989 Jan 18 ] Uncertain 0  
[ 1977 Oct ] [ 1977 Oct ] Uncertain 0  
[ 1976 Aug ] [ 1976 Aug ] Uncertain 0  
[ 1975 Aug 13 ] [ 1975 Sep 26 ] Uncertain 0  
[ 1974 Jul 6 ] [ 1974 Jul 6 ] Uncertain 0  
1916 Jun 21 Unknown Confirmed 0 Historical Observations Just west of Smith Rock
[ 1873 ] [ Unknown ] Uncertain 0   31.28 N 139.92 E
1870 May Unknown Confirmed 2 Historical Observations 18 km SW of Smith Rock
[ 1672 (?) ] [ Unknown ] Uncertain 0   31.58 N 140.25 E

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.

Photo Gallery


Wave erosion has exposed the spectacular stratigraphy of Smith Rock, a steep-sided pinnacle that is a remnant of the outer southern flank of a 6-9 km wide submarine caldera. Intrusive rocks, dikes, tephra layers, and breccias are visible in this view of the eastern side of the 136-m-high pinnacle. Submarine eruptions have been reported from a number of locations near 136-m-high Smith Rock, the last of which occurred in 1916. Water discoloration has been frequently observed near Smith Rock since the 1970s.

Copyrighted photo by Kenichiro Tani, 2002 (Japanese Quaternary Volcanoes database, RIODB, http://riodb02.ibase.aist.go.jp/strata/VOL_JP/EN/index.htm and Geol Surv Japan, AIST, http://www.gsj.jp/).
See title for photo information.
Geologists stand on the narrow cobble beach at the NE base of Smith Rock. Vertical light-colored dikes cut intrusive rocks at the lower right and oxidized tephra layers, breccias, and lava flows forming the 136-m-high pinnacle. The spire is an eroded remnant of the subaerial pre-caldera volcano on the outer southern flank of a large submarine caldera. A large segment of the eastern side of the pinnacle slumped into the sea in the past decade.

Copyrighted photo by Kenichiro Tani, 2002 (Japanese Quaternary Volcanoes database, RIODB, http://riodb02.ibase.aist.go.jp/strata/VOL_JP/EN/index.htm and Geol Surv Japan, AIST, http://www.gsj.jp/).
See title for photo information.

Smithsonian Sample Collections Database


There are no samples for Sumisujima in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites