About East Diamante
East Diamante is a stratovolcano rising to -127 meters (-417 feet) in United States's Northwestern Pacific Volcanic Regions. No historical eruptions have been recorded, though the volcano is classified based on geological evidence of past activity.
Geography & Climate
East Diamante is located in United States, within the Mariana Volcanic Arc of the broader Northwestern Pacific Volcanic Regions. Situated at 15.93° N, 145.67° E in the Northern Hemisphere, the volcano lies within a tropical climate zone. With an elevation of -127 meters — below sea level — East Diamante is a submarine or submerged volcanic feature. Submarine volcanoes make up the majority of Earth's volcanic activity, though most eruptions go unobserved beneath the ocean surface. The volcanic landform is characterized as a composite, which describes the physical shape and structure of the volcanic edifice as observed from the surface.
Geological Context
East Diamante sits in a subduction zone, where one tectonic plate dives beneath another, creating intense heat and pressure that generates magma. Subduction zones are responsible for many of the world's most explosive volcanoes and deadliest eruptions. For communities in United States near East Diamante, this tectonic setting means the volcano is capable of producing powerful explosive eruptions, pyroclastic flows, and lahars that can threaten populated areas within tens of kilometers of the summit. The dominant rock type is dacite, an intermediate to silica-rich volcanic rock. This composition typically produces more viscous magma, leading to more explosive eruptions with ash columns and pyroclastic flows. Andesitic and dacitic magmas build pressure before erupting, which is why volcanoes with this rock chemistry are often associated with Plinian-style eruptions that can send ash tens of kilometers into the atmosphere and disrupt aviation across entire regions.
GVP Reference 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.
— Smithsonian Institution, Global Volcanism Program
0 Recorded Eruptions
No eruption records available for East Diamante.
Real-Time Data
USGS Alert Level
Thermal Anomalies
Frequently Asked Questions About East Diamante
Is East Diamante an active volcano?+
East Diamante is not currently classified as active. Its activity evidence is listed as "Unrest / Holocene." No recorded eruptions have been documented. However, no volcano is ever considered permanently extinct.
How high is East Diamante?+
East Diamante has a summit elevation of -127 meters (-417 feet) above sea level. With an elevation of -127 meters (below sea level), this is a submarine or submerged volcanic feature.
What type of volcano is East Diamante?+
East Diamante is classified as a Stratovolcano. Stratovolcanoes (also called composite volcanoes) are steep, conical volcanoes built up by many layers of hardened lava, tephra, and volcanic ash. They are among the most common and dangerous types, known for explosive eruptions.
Where is East Diamante located?+
East Diamante is located in United States, in the Northwestern Pacific Volcanic Regions. More specifically, it lies within the Mariana Volcanic Arc. Its exact coordinates are 15.930° latitude, 145.670° longitude.
Is it safe to visit East Diamante?+
East Diamante can generally be visited, but as with any volcano, visitors should check local conditions and any advisory notices before traveling. United States may have specific regulations for accessing volcanic areas. Guided tours are often the safest and most informative way to experience a volcano.
