Monowai Vulcano
Updated: 7 lug. 2025 13:32 GMT -
submarine volcano
Kermandec Islands, New Zealand, -25.89°S / -177.19°W 
Summit height: -132 m / - 433 ft
Current status: normal or dormant (1 out of 5)
Last update: 15 dic 2021
Map view shows Monowai submarine volcano at the lower left, with subsidiary cones on its northern flank. A large submarine caldera lies at the upper right lies to the NE. The contour interval is 100 meters, and the resolution of the bathymetry data is 25 meters. The proprietary bathymetry data were obtained by scientists of the New Zealand National Institute of Water and Atmospheric Research (NIWA) during a 2005 New Zealand/American NOAA Ocean Explorer research expedition to the Kermadec-Tonga arc. Image courtesy of Ian Wright, 2005 (NIWA; http://oceanexplorer.noaa.gov/explorations/05fire)
Monowai seamount (also known as Orion seamount) is one of the most active volcanoes of the Kermancec Arc. It has a large submarine caldera and is located halfway between Tonga and the Kermadec Islands. Eruptions at Monowai occur every few years.
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Eruzioni del vulcano Monowai: 2008, 2006, 2005, 2003, 2002 (Nov), 2002 (May), 1999, 1997-98, 1997 (Apr), 1996, 1995, 1990-91, 1988, 1986, 1982, 1980, 1979, 1978, 1977 (Oct), 1977 (Apr), 1944(?)
Latest nearby earthquakes
| Data e ora | Mag / Prof. | Distanza / Posizione | |||
|---|---|---|---|---|---|
Background
Monowai seamount, also known as Orion seamount, rises to within 100 m of the sea surface about halfway between the Kermadec and Tonga island groups. The volcano lies at the southern end of the Tonga Ridge and is slightly offset from the Kermadec volcanoes. Small parasitic cones occur on the north and west flanks of the basaltic submarine volcano, which rises from a depth of about 1500 m and was named for one of the New Zealand Navy bathymetric survey ships that documented its morphology.A large 8.5 x 11 km wide submarine caldera with a depth of more than 1500 m lies to the NNE. Numerous eruptions from Monowai have been detected from submarine acoustic signals since it was first recognized as a volcano in 1977. A shoal that had been reported in 1944 may have been a pumice raft or water disturbance due to degassing. Surface observations have included water discoloration, vigorous gas bubbling, and areas of upwelling water, sometimes accompanied by rumbling noises.
Source: Smithsonian / GVP volcano information
Eruzioni vulcaniche significative: Monowai volcano
In the past 10,000 years, Monowai has had at least 25 confirmed eruptions, all documented by historical records or observations. Additionally, there are 2 uncertain or discredited eruptions from Monowai volcano.
The table below lists all known eruptions (date in bold face) of Monowai volcano since around 1900. Updates on the most recent volcanic activity of Monowai can be found on the news page of Monowai volcano.
| Data | Nota | VEI | Deceduti | Danni | |
|---|---|---|---|---|---|
?? | Eruzione incerta | 0 | sconosciuto | ||
| Submarine Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
| Summit Osservazioni/documentazioni storiche | 1 | sconosciuto | |||
| Submarine Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
| Summit Crater Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 1 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
Osservazioni/documentazioni storiche | 0 | sconosciuto | |||
?? | Eruzione incerta | 0 | sconosciuto | ||
Remark:
Our list of volcanic eruptions closely follows the database of eruptions of the Smithsonian's Global Volcanism Project (GVP), the internationally most recognized data source for volcanic eruptions, but also includes significant eruptive episodes or related volcano events. "Volcanic eruptions" are usually to be understood as sequences of individual eruptive episodes that can follow each other, or even overlap (if several vents are involved), and can last many years, decades or even longer. For example, the current activity of Stromboli volcano is understood as a single eruption that has been ongoing since 1934.
Fonti: NOAA National Centers for Environmental Information (NCEI), Global Significant Volcanic Eruptions Database. doi:10.7289/V5TD9V7K | Global Volcanism Project / Smithsonian Institution
Monowai Volcano FAQ
+When was the last eruption of Monowai volcano?
The last confirmed eruption of Monowai occurred in 2014.
+How often does Monowai volcano erupt?
Monowai volcano erupts almost every year. Since its first historically documented eruption 1977, Monowai has often been near-continuously active. The Global Volcanism Project counts 25 historic eruptions until now, spanning a total of 25 out of 48 years. In other words, Monowai is active roughly every one in 1.9 years on average. This value is likely an underestimate, because the known history of eruption might not contain all eruptions, especially further back in time. The last eruption of Monowai
+How active is Monowai volcano at present?
Monowai volcano is relatively active: Since 1900, it has had 25 eruptions, and been active during 25 years out of 126 as of now. This means, Monowai has been in eruption one in 5 years on average. The last eruption was in 2014 and ended 11 years ago.
+When was the largest eruption of Monowai volcano?
The largest eruption of Monowai volcano in historic times occurred in 2014. It only has a VEI (Volcanic Explosivity Index) of 1, likely because it was a mainly effusive eruption generating lava flows but very little ash.
Ultime immagini satellitari
Monowai Vulcano Mappe
Below is a selection of maps showing the location and surroundings of the volcano at various resolutions based on aerial-imagery / terrain maps. Feel free to use them for non-commercial purposes on your blog or website as long as you credit them with a link back to this page (click to copy it).
Satellite/aerial-type map of Monowai volcano (world scale)
Terrain-type map of Monowai volcano (world scale)
Satellite/aerial-type map of Monowai volcano (region scale large)
Terrain-type map of Monowai volcano (region scale large)
Satellite/aerial-type map of Monowai volcano (region scale medium)
Terrain-type map of Monowai volcano (region scale medium)
Satellite/aerial-type map of Monowai volcano (region scale small)
Terrain-type map of Monowai volcano (region scale small)
Satellite/aerial-type map of Monowai volcano (local scale large)
Terrain-type map of Monowai volcano (local scale large)
Satellite/aerial-type map of Monowai volcano (local scale medium)
Terrain-type map of Monowai volcano (local scale medium)
Satellite/aerial-type map of Monowai volcano (local scale small)
Terrain-type map of Monowai volcano (local scale small)
Satellite/aerial-type map of Monowai volcano (scale of 10s of km)
Terrain-type map of Monowai volcano (scale of 10s of km)
Satellite/aerial-type map of Monowai volcano (scale of 20-40 km)
Terrain-type map of Monowai volcano (scale of 20-40 km)
Satellite/aerial-type map of Monowai volcano (scale of approx. 10-20 km)
Terrain-type map of Monowai volcano (scale of approx. 10-20 km)
Satellite/aerial-type map of Monowai volcano (scale of 5-10 km)
Satellite/aerial-type map of Monowai volcano (scale of few kilometers)
