East Diamante | U.S. Geological Survey
Source: https://www.usgs.gov/volcanoes/east-diamante
Archived: 2026-04-23 17:12
East Diamante | U.S. Geological Survey
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The dacitic East Diamante submarine volcano contains an elongated NE-SW-trending caldera with a pronounced rim on the NE side.
Facts Block
Location:
Commonwealth of the Northern Mariana Islands
Latitude:
15.93° N
Longitude:
145.67° E
Elevation:
-127 (m) -417 (f)
Volcano type:
Submarine
Composition:
Dacite
Most recent eruption:
unknown
Threat Potential:
Moderate*
*based on the
National Volcano Early Warning System
Summary
The dacitic East Diamante submarine volcano contains an elongated NE-SW-trending caldera with a pronounced rim on the NE side. A large post-caldera cone lies on the SW caldera rim, and a complex of lava domes was constructed in the center of the caldera. Several areas of hydrothermal activity including "black smoker" sulfide chimneys at the Black Forest site were detected on the central dome complex at depths of only a few hundred meters. The summit extends to within 127 m of the ocean surface. West Diamante seamount lies 28 km W, with the much smaller Middle Diamante about 15 km W.
Facts Block
Location:
Commonwealth of the Northern Mariana Islands
Latitude:
15.93° N
Longitude:
145.67° E
Elevation:
-127 (m) -417 (f)
Volcano type:
Submarine
Composition:
Dacite
Most recent eruption:
unknown
Threat Potential:
Moderate*
*based on the
National Volcano Early Warning System
Volcanoes Hazards Program Links
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Forecast
Activity
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Observatories
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Skip to main content
Official websites use .gov
A
.gov
website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A
lock (
)
or
https://
means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
East Diamante
Find U.S. Volcano
Filters
Learn More
The map displays volcanoes, earthquakes, monitoring instruments, and past lava flows.
Get Help
Earthquake Plots
To view an earthquake cross-sectional plot, click "Draw Plot" to start drawing on the map. Once the plot area is selected, click on "View Plot" to view chart or "Clear Plot" to start over.
Map Layers
Earthquake Colors
Earthquake Depth Units
Earthquake Time Units
Results
Filters
Learn More
The map displays volcanoes, earthquakes, monitoring instruments, and past lava flows.
Get Help
Earthquake Plots
To view an earthquake cross-sectional plot, click "Draw Plot" to start drawing on the map. Once the plot area is selected, click on "View Plot" to view chart or "Clear Plot" to start over.
Settings
Map Layers
Earthquake Colors
Earthquake Depth Units
Earthquake Time Units
x
Map Legend
x
Map Legend
Results
East Diamante
Home
Publications
Connect
The dacitic East Diamante submarine volcano contains an elongated NE-SW-trending caldera with a pronounced rim on the NE side.
Facts Block
Location:
Commonwealth of the Northern Mariana Islands
Latitude:
15.93° N
Longitude:
145.67° E
Elevation:
-127 (m) -417 (f)
Volcano type:
Submarine
Composition:
Dacite
Most recent eruption:
unknown
Threat Potential:
Moderate*
*based on the
National Volcano Early Warning System
Summary
The dacitic East Diamante submarine volcano contains an elongated NE-SW-trending caldera with a pronounced rim on the NE side. A large post-caldera cone lies on the SW caldera rim, and a complex of lava domes was constructed in the center of the caldera. Several areas of hydrothermal activity including "black smoker" sulfide chimneys at the Black Forest site were detected on the central dome complex at depths of only a few hundred meters. The summit extends to within 127 m of the ocean surface. West Diamante seamount lies 28 km W, with the much smaller Middle Diamante about 15 km W.
Facts Block
Location:
Commonwealth of the Northern Mariana Islands
Latitude:
15.93° N
Longitude:
145.67° E
Elevation:
-127 (m) -417 (f)
Volcano type:
Submarine
Composition:
Dacite
Most recent eruption:
unknown
Threat Potential:
Moderate*
*based on the
National Volcano Early Warning System
Volcanoes Hazards Program Links
Assess
Prepare
Forecast
Activity
Products
Observatories
About
Was this page helpful?