Volcanoes of the United States

East Diamante, United States

Submarine volcano · -127 m (-417 ft) · Mariana Is-C Pacific

East Diamante is a submarine volcano in the United States, -127 m (-417 ft) high. Its last known eruption: 1964 or later. NOAA records no significant eruption here.

East Diamante on the map

East Diamante and the volcanoes within 300 km, colored by when each last erupted.

  • Since 1964
  • 1900 to 1963
  • 1800s
  • AD 1 to 1799
  • Before AD 1, or undated

Open the live map with volcanic ash advisories and webcams

Now

From the USGS Volcano Hazards Program, read 06:09 UTC. USGS threat ranking: Moderate Threat.

Unassigned / Unassigned USGS, Northern Mariana Islands rates East Diamante at alert level Unassigned, aviation color code Unassigned.

The observatory’s page

The volcano

Type
Submarine volcano
Elevation
-127 m (-417 ft)
Region
Mariana Is-C Pacific
Summit
15.930° N, 145.670° E
Last known eruption
1964 or later
Holocene activity known from
Historical
Smithsonian volcano number
284201

Significant eruptions

NOAA records eruptions that killed, did damage, were very large, or set off a tsunami or earthquake.

None on record.

Around it

The volcanoes within 300 km.

Earthquakes near East DiamanteAsh advisories and webcams on the live map

Sources

Volcanoes and significant eruptions from NOAA’s National Centers for Environmental Information, Global Historical Hazard Database, cited as NCEI/WDS, doi:10.7289/V5PN93H7. Public domain. Read 2026-09-24. Alert levels, color codes and notices from the USGS Volcano Hazards Program and its observatories, public domain. Volcano numbers are the Smithsonian Institution’s Global Volcanism Program’s.