Daikoku

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 21.324°N
  • 144.194°E

  • -323 m
    -1059 ft

  • 284137
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Bulletin Report: April 2017 (BGVN 42:04) Citation IconCite this Report


Explorations in 2014 and 2016 reveal active hydrothermal plumes and sulfur chimney formation

Daikoku seamount lies in the Northern Seamount Province of the Mariana Arc, and is about 850 km due N of Guam in the western Pacific Ocean. The summit is about 325 m below sea level and was first shown to be hydrothermally active in 2003 (figure 3). NOAA (National Oceanic and Atmospheric Administration) has conducted four expeditions to the Northern Mariana Islands in 2003, 2004, 2006, and 2014 under their Ocean Explorer program, specifically to study the volcanoes and the marine life they support. A comparison of the bathymetry recorded in 2003 and 2014 suggests that an explosion may have occurred at Daikoku during that interval, and both geochemical data and rock sampling indicate ongoing hydrothermal activity. In 2016, a research cruise conducted by the Schmidt Ocean Institute included a visit to Daikoku that revealed sulfur chimney formation.

Figure (see Caption) Figure 3. Bathymetry and other data gathered on the 2003 NOAA Ocean Explorer Program's 'Submarine Ring of Fire 2003' expedition at the Mariana Arc between 9 February and 5 March 2003. The stars indicate submarine volcanoes where evidence of hydrothermal activity was found. The volcanoes were mapped in high resolution, and sampled with a CTD, as indicated by the open black circles on the tracklines. The red dots represent the location of the deployed hydrophones and the red line represents the location of the back-arc spreading center. Daikoku is located in the Northern Seamount Province of the Mariana Arc. Courtesy of NOAA's 'Submarine Ring of Fire 2003' expedition.

Geochemical sampling of the seawater is carried out with an instrument package that measures conductivity, temperature, and depth, commonly referred to as a CTD. Turbidity of the water, which estimates the concentration of particulate matter suspended in the plumes, is also measured. The CTD carries bottles for seawater sampling which is then geochemically analyzed.

On 15 April 2004 the NOAA 'Submarine Ring of Fire 2004' expedition made a single dive at Daikoku and noted warm water present over large areas of sandy sediment deposits near the summit, and small flatfish in great abundance in the venting areas. The 'Submarine Ring of Fire 2006' expedition again visited Daikoku on 4 May 2006 and discovered a "cauldron" of molten sulfur (BGVN 31:05). They also observed extensive sulfur crusts in the vicinity of the cauldron, suggesting past emissions of liquid sulfur; they were able to sample a large piece of sulfur crust (figure 4). At that time, they also mapped two large craters on the summit. One pit was reported as over 100 m deep and about 80 m in diameter, and a large plume of white fluid was observed rising out of it.

Figure (see Caption) Figure 4. Sulfur crusts near the Diakoku "cauldron" were observed insitu as well as sampled by the ROV. Upper Image: Sulfur crusts in the vicinity of the sulfur cauldron (BGVN 31:05) imply past emissions of liquid sulfur at Daikoku. Lower Image: The Jason remotely operated vehicle (ROV) holds up a large piece of the sulfur crust that was sampled at Daikoku on 4 May 2006. The lasers- two red dots in the images- are 10 cm apart. Courtesy of Submarine Ring of Fire 2006 expedition, NOAA Ocean Explorer Program.

Researchers from the NOAA Ocean Explorer program visited Daikoku again on 14 December 2014 during its 'Submarine Ring of Fire 2014 – Ironman' expedition, which was conducted from the R/V (Research Vessel) Revelle between 29 November and 22 December 2014. They gathered geochemical and bathymetric data which they were able to compare with 2003 data. The CTD information gathered in 2014 showed very strong plumes coming from the top of the seamount. The plumes had high turbidity, low pH, strong anomalies in reduced chemicals, and very high levels of hydrogen (figure 5).

Figure (see Caption) Figure 5. Cross-section over the top of Daikoku seamount measured on 14 December 2014 with the results from a CTD tow (black line), showing turbidity anomalies (warm colors indicate high particle concentrations) in the plume. Courtesy of 'Submarine Ring of Fire 2014 – Ironman' expedition, NOAA/PMEL, NSF.

The 2014 bathymetry data revealed two summit craters; the larger one measured 150 m across and 100 m deep on the N side of the summit with a crater floor depth of 452 m below sea level, and the smaller one, about 50 m across on the NE flank, had a crater floor depth of 443 m below sea level. The bathymetry data from 2003 show only one small crater on the N side of the summit about 50 m across with a floor depth of 400 m below sea level (figure 6). The larger pit appeared to be about 70 m wider in 2014 than in 2006.

Figure (see Caption) Figure 6. Bathymetric comparison of data collected at the Daikoku summit during the 2014 expedition (top) and in 2003 (bottom). The summit crater was significantly larger, and confirmed to be hydrothermally active by the CTD tow and midwater data collected by the 2014 expedition. A second crater has also appeared on the NE flank of the volcano. Arrows with numbers represent the depth below sea level (Z) in meters. Courtesy of 'Submarine Ring of Fire 2014 – Ironman' expedition, NSF/NOAA.

On 3 and 4 December 2016, the Schmidt Ocean Institute Research Vessel R/V Falkor travelled to the Mariana back-arc with a multidisciplinary team of scientists to gather evidence of active hydrothermal vents and the life they support. They were able to make two ROV (Remotely Operated Vehicle) dives at Daikoku and collected data on the seamount and sea life living there. On their first dive they observed (and sampled) a fissure with a sulfur chimney caked with yellow sulfur, emitting white bubbles and particulates in 70°C water (figure 7).

Figure (see Caption) Figure 7. An active sulfur chimney at Daikoku on 3 December 2016 was videoed and sampled by the Schmidt Ocean Institute expedition. Upper Image: A fissure at Daikoku on 3 December 2016 with a yellow sulfur-caked chimney emitting white bubbles and particulates in 70°C water. Lower Image: The sulfur chimney was sampled by the ROV SuBastian for chemical analysis. Courtesy of Schmidt Ocean Institute, Expedition FK161129.

On their second dive on 4 December 2016, they collected tube worms and crabs, and recorded the formation of "sulfur needles," tadpole-shaped fragments of sulfur that were previously observed in sampled sediments and seen floating in the water column. They appear to form when gas bubbles (probably CO2) rise through molten sulfur, forming a coating of sulfur around the bubble before the gas escapes (figure 8). Their video shows a sulfur chimney caked with yellow sulfur emitting yellow, white, and orange droplets of sulfur.

Figure (see Caption) Figure 8. Tadpole shaped "sulfur needles" coat the side of a sulfur chimney at Daikoku on 4 December 2016 as gas bubbles coated with sulfur rise through the chimney and drip residue around the sides. A video recording was also made of the chimney emitting bubbles (https://schmidtocean.org/cruise-log-post/daikoku-dive-2-sulfur-good/). Courtesy of Schmidt Ocean Institute, Expedition FK161129.

The cruise scientists used the ship's EM302/710 multibeam echosounder to get a 2-m-resolution image of the summit crater, which they combined with water column data to create an image showing both the bathymetry of the volcano and the shape of the hydrothermal plume emitting from the summit (figure 9).

Figure (see Caption) Figure 9. Multibeam echosounder data reveals the topography of the summit at Daikoku on 4 December 2016 as well as the shape of the hydrothermal plume emitting from the summit. Courtesy of Schmidt Ocean Institute, Expedition FK161129.

Information Contacts: Office of Ocean Exploration and Research, National Oceanic and Atmospheric Administration (NOAA), 1315 East-West Highway, Silver Spring, MD 20910, USA (URL: http://oceanexplorer.noaa.gov/, Cruise logs at: http://oceanexplorer.noaa.gov/explorations/03fire/logs/summary/summary.html, http://oceanexplorer.noaa.gov/explorations/04fire/logs/april15/april15.html, http://oceanexplorer.noaa.gov/explorations/06fire/logs/may4/may4.html, http://oceanexplorer.noaa.gov/explorations/14fire/logs/december14/december14.html); Schmidt Ocean Institute, 555 Bryant Street #374, Palo Alto, CA 94301, USA (URL: https://schmidtocean.org/, https://schmidtocean.org/cruise/searching-life-mariana-back-arc/.

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

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.

05/2006 (BGVN 31:05) Discovery of agitated pool of molten sulfur at 420 m ocean depth

04/2017 (BGVN 42:04) Explorations in 2014 and 2016 reveal active hydrothermal plumes and sulfur chimney formation




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


May 2006 (BGVN 31:05) Citation IconCite this Report


Discovery of agitated pool of molten sulfur at 420 m ocean depth

Submarine exploration at Daikoku seamount has discovered a small pit or cauldron containing a pool of molten sulfur. During the period of 18 April-13 May 2006, scientists from the National Oceanic and Atmospheric Agency (NOAA), aboard the research vessel Melville completed the 2006 Submarine Ring of Fire Expedition. This expedition was the third in a series exploring of the submarine volcanoes lying along the Mariana arc (figure 1). The arc extends from S of the island of Guam northward more than 1,450 km. Daily logs of the 2006 expedition, including photographs and video clips, can be viewed on the NOAA Ocean Explorer website (see Information Contacts below).

Figure (see Caption) Figure 1. Bathymetric tectonic map of the Marianas arc showing islands and seamounts (with respective labels on backgrounds of dark and white). Reports in this issue discuss (from N to S), Diakoku, Anatahan, and NW Rotoa-1. Courtesy of Submarine Ring of Fire 2006 Expedition, NOAA Vents Program.

William Chadwick reported on the 2006 expedition (Oregon State University press release, 25 May 2006) that ". . . on another volcano called Daikoku, in the northern part of the Mariana volcanic arc, the researchers discovered a pool of molten sulfur at a depth of 420 m. It was measured at 187°C. It was a sulfur pond with a flexible 'crust' that was moving in a wavelike motion. The movement was triggered by continuous gases being emitted from beneath the pool and passing through the sulfur." (figure 2).

Figure (see Caption) Figure 2. On 4 May 2006 scientists piloting the submersible Remotely Operated Vehicle (ROV) Jason at Daikoku observed and photographed a convecting, black pool of liquid sulfur (inset, and upper image) with a partly solidified sulfur crust (bottom image). Gases, particulate with the appearance of smoke, and liquid sulfur were bubbling up from the back edge of the sulfur pool. The top image shows a zoomed-in view of the liquid sulfur extruding from a fracture in the solid crust. Image courtesy of Submarine Ring of Fire 2006 Expedition, NOAA Vents Program.

In another pit on the summit of Daikoku, over 100 m deep and ~ 80 m in diameter, the scientists observed a large plume of slowly rising white fluid.

References. Embley, R.W., Baker, E.T., Chadwick, W.W., Jr., Lipton, J.E., Resing, J.A., Massoth, G.J., and Nakamura, K., 2004, Explorations of Mariana Arc volcanoes reveal new hydrothermal systems: EOS, Transactions, American Geophysical Union, v. 85, no. 2, p. 37, 40.

Embley, R.W., Chadwick, W.W., Jr, Baker, E.T., Butterfield, D.A., Resing, J.A., de Ronde, C. E.J., Tunnicliffe, V., Lupton, J.E., Juniper, S.K., Rubin, K.H., Stern, R.J., Lebon, G.T., Nakamura, K., Merle, S.G., Hein, J.R., Wiens, D.A., and Tamura, Y., 2006, Long-term eruptive activity at a submarine arc volcano: Nature, v. 441, no. 7092, p. 494-497.

Oregon State University, 25 May 2006, Press Release: Nature paper details eruption activity at submarine volcano: College of Oceanic and Atmospheric Science (COAS), 104 COAS Admininstration Building, Corvallis, OR 97331.

Information Contacts: William W. Chadwick, Jr., Cooperative Institute for Marine Resources Studies (CIMRS), NOAA Pacific Marine Environmental Laboratory (PMEL), 2115 SE OSU Drive, Newport, OR 97365 USA (Email: bill.chadwick@noaa.gov); NOAA Ocean Explorer (URL: http://oceanexplorer.noaa.gov/explorations/06fire/welcome.html).


April 2017 (BGVN 42:04) Citation IconCite this Report


Explorations in 2014 and 2016 reveal active hydrothermal plumes and sulfur chimney formation

Daikoku seamount lies in the Northern Seamount Province of the Mariana Arc, and is about 850 km due N of Guam in the western Pacific Ocean. The summit is about 325 m below sea level and was first shown to be hydrothermally active in 2003 (figure 3). NOAA (National Oceanic and Atmospheric Administration) has conducted four expeditions to the Northern Mariana Islands in 2003, 2004, 2006, and 2014 under their Ocean Explorer program, specifically to study the volcanoes and the marine life they support. A comparison of the bathymetry recorded in 2003 and 2014 suggests that an explosion may have occurred at Daikoku during that interval, and both geochemical data and rock sampling indicate ongoing hydrothermal activity. In 2016, a research cruise conducted by the Schmidt Ocean Institute included a visit to Daikoku that revealed sulfur chimney formation.

Figure (see Caption) Figure 3. Bathymetry and other data gathered on the 2003 NOAA Ocean Explorer Program's 'Submarine Ring of Fire 2003' expedition at the Mariana Arc between 9 February and 5 March 2003. The stars indicate submarine volcanoes where evidence of hydrothermal activity was found. The volcanoes were mapped in high resolution, and sampled with a CTD, as indicated by the open black circles on the tracklines. The red dots represent the location of the deployed hydrophones and the red line represents the location of the back-arc spreading center. Daikoku is located in the Northern Seamount Province of the Mariana Arc. Courtesy of NOAA's 'Submarine Ring of Fire 2003' expedition.

Geochemical sampling of the seawater is carried out with an instrument package that measures conductivity, temperature, and depth, commonly referred to as a CTD. Turbidity of the water, which estimates the concentration of particulate matter suspended in the plumes, is also measured. The CTD carries bottles for seawater sampling which is then geochemically analyzed.

On 15 April 2004 the NOAA 'Submarine Ring of Fire 2004' expedition made a single dive at Daikoku and noted warm water present over large areas of sandy sediment deposits near the summit, and small flatfish in great abundance in the venting areas. The 'Submarine Ring of Fire 2006' expedition again visited Daikoku on 4 May 2006 and discovered a "cauldron" of molten sulfur (BGVN 31:05). They also observed extensive sulfur crusts in the vicinity of the cauldron, suggesting past emissions of liquid sulfur; they were able to sample a large piece of sulfur crust (figure 4). At that time, they also mapped two large craters on the summit. One pit was reported as over 100 m deep and about 80 m in diameter, and a large plume of white fluid was observed rising out of it.

Figure (see Caption) Figure 4. Sulfur crusts near the Diakoku "cauldron" were observed insitu as well as sampled by the ROV. Upper Image: Sulfur crusts in the vicinity of the sulfur cauldron (BGVN 31:05) imply past emissions of liquid sulfur at Daikoku. Lower Image: The Jason remotely operated vehicle (ROV) holds up a large piece of the sulfur crust that was sampled at Daikoku on 4 May 2006. The lasers- two red dots in the images- are 10 cm apart. Courtesy of Submarine Ring of Fire 2006 expedition, NOAA Ocean Explorer Program.

Researchers from the NOAA Ocean Explorer program visited Daikoku again on 14 December 2014 during its 'Submarine Ring of Fire 2014 – Ironman' expedition, which was conducted from the R/V (Research Vessel) Revelle between 29 November and 22 December 2014. They gathered geochemical and bathymetric data which they were able to compare with 2003 data. The CTD information gathered in 2014 showed very strong plumes coming from the top of the seamount. The plumes had high turbidity, low pH, strong anomalies in reduced chemicals, and very high levels of hydrogen (figure 5).

Figure (see Caption) Figure 5. Cross-section over the top of Daikoku seamount measured on 14 December 2014 with the results from a CTD tow (black line), showing turbidity anomalies (warm colors indicate high particle concentrations) in the plume. Courtesy of 'Submarine Ring of Fire 2014 – Ironman' expedition, NOAA/PMEL, NSF.

The 2014 bathymetry data revealed two summit craters; the larger one measured 150 m across and 100 m deep on the N side of the summit with a crater floor depth of 452 m below sea level, and the smaller one, about 50 m across on the NE flank, had a crater floor depth of 443 m below sea level. The bathymetry data from 2003 show only one small crater on the N side of the summit about 50 m across with a floor depth of 400 m below sea level (figure 6). The larger pit appeared to be about 70 m wider in 2014 than in 2006.

Figure (see Caption) Figure 6. Bathymetric comparison of data collected at the Daikoku summit during the 2014 expedition (top) and in 2003 (bottom). The summit crater was significantly larger, and confirmed to be hydrothermally active by the CTD tow and midwater data collected by the 2014 expedition. A second crater has also appeared on the NE flank of the volcano. Arrows with numbers represent the depth below sea level (Z) in meters. Courtesy of 'Submarine Ring of Fire 2014 – Ironman' expedition, NSF/NOAA.

On 3 and 4 December 2016, the Schmidt Ocean Institute Research Vessel R/V Falkor travelled to the Mariana back-arc with a multidisciplinary team of scientists to gather evidence of active hydrothermal vents and the life they support. They were able to make two ROV (Remotely Operated Vehicle) dives at Daikoku and collected data on the seamount and sea life living there. On their first dive they observed (and sampled) a fissure with a sulfur chimney caked with yellow sulfur, emitting white bubbles and particulates in 70°C water (figure 7).

Figure (see Caption) Figure 7. An active sulfur chimney at Daikoku on 3 December 2016 was videoed and sampled by the Schmidt Ocean Institute expedition. Upper Image: A fissure at Daikoku on 3 December 2016 with a yellow sulfur-caked chimney emitting white bubbles and particulates in 70°C water. Lower Image: The sulfur chimney was sampled by the ROV SuBastian for chemical analysis. Courtesy of Schmidt Ocean Institute, Expedition FK161129.

On their second dive on 4 December 2016, they collected tube worms and crabs, and recorded the formation of "sulfur needles," tadpole-shaped fragments of sulfur that were previously observed in sampled sediments and seen floating in the water column. They appear to form when gas bubbles (probably CO2) rise through molten sulfur, forming a coating of sulfur around the bubble before the gas escapes (figure 8). Their video shows a sulfur chimney caked with yellow sulfur emitting yellow, white, and orange droplets of sulfur.

Figure (see Caption) Figure 8. Tadpole shaped "sulfur needles" coat the side of a sulfur chimney at Daikoku on 4 December 2016 as gas bubbles coated with sulfur rise through the chimney and drip residue around the sides. A video recording was also made of the chimney emitting bubbles (https://schmidtocean.org/cruise-log-post/daikoku-dive-2-sulfur-good/). Courtesy of Schmidt Ocean Institute, Expedition FK161129.

The cruise scientists used the ship's EM302/710 multibeam echosounder to get a 2-m-resolution image of the summit crater, which they combined with water column data to create an image showing both the bathymetry of the volcano and the shape of the hydrothermal plume emitting from the summit (figure 9).

Figure (see Caption) Figure 9. Multibeam echosounder data reveals the topography of the summit at Daikoku on 4 December 2016 as well as the shape of the hydrothermal plume emitting from the summit. Courtesy of Schmidt Ocean Institute, Expedition FK161129.

Information Contacts: Office of Ocean Exploration and Research, National Oceanic and Atmospheric Administration (NOAA), 1315 East-West Highway, Silver Spring, MD 20910, USA (URL: http://oceanexplorer.noaa.gov/, Cruise logs at: http://oceanexplorer.noaa.gov/explorations/03fire/logs/summary/summary.html, http://oceanexplorer.noaa.gov/explorations/04fire/logs/april15/april15.html, http://oceanexplorer.noaa.gov/explorations/06fire/logs/may4/may4.html, http://oceanexplorer.noaa.gov/explorations/14fire/logs/december14/december14.html); Schmidt Ocean Institute, 555 Bryant Street #374, Palo Alto, CA 94301, USA (URL: https://schmidtocean.org/, https://schmidtocean.org/cruise/searching-life-mariana-back-arc/.

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

Eruptive History


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

Deformation History


There is no Deformation History data available for Daikoku.

Emission History


There is no Emissions History data available for Daikoku.

Photo Gallery


Smoke rises from the margins of a vent at about 420 m depth on Daikoku seamount in this close-up view only about a few meters across. During a NOAA expedition in 2006, scientists observed a convecting, black pool of liquid sulfur with a partly solidified, undulating sulfur crust at a depth of 420 m below the summit of Daikoku. The conical summit of Daikoku seamount lies along an elongated E-W-trending ridge SE of Eifuku submarine volcano and rises to within 323 m of the sea surface.

Image courtesy of Submarine Ring of Fire 2006 Exploration, NOAA Vents Program.
See title for photo information.

Smithsonian Sample Collections Database


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

Affiliated Sites