Northern EPR-Segment RO3

No photo available for this volcano
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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 15.83°N
  • 105.43°W

  • -2300 m
    -7544 ft

  • 334021
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Northern EPR-Segment RO3.

The Global Volcanism Program has no Weekly Reports available for Northern EPR-Segment RO3.

The Global Volcanism Program has no Bulletin Reports available for Northern EPR-Segment RO3.

Basic Data

Volcano Number

Last Known Eruption



50 BCE

-2300 m / -7544 ft


Volcano Types

Fissure vent(s)

Rock Types

Basalt / Picro-Basalt

Tectonic Setting

Rift zone
Oceanic crust (< 15 km)


Within 5 km
Within 10 km
Within 30 km
Within 100 km

Geological Summary

Segment RO3 of the Northern East Pacific Rise lies between the Orozco and Rivera transform faults, immediately north of the Orozco transform. Unlike segment RO2 to the north, the RO3 segment displays a broad, shallow profile that is the widest and shallowest of a 5000-km-long segment of the East Pacific Rise between 23 degrees south to 23 degrees north. The flat axial crest ranges from 3-4 to about 10 km wide and is about 2300-2350 m deep; the axis morphology suggests a high magma supply rate. Magnetic paleointensity measurements on basaltic glasses dated several lava flows along segment RO3 at about 2000 +/- 1000 years, suggesting a major volcanic episode that produced lava flows flooding much of the axial plateau and extended on to its flanks. Several other lava flows were dated at "contemporary" ages, perhaps less than 100 years.


The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography.

Carlut J, Cormier M-H, Kent D V, Donnelly K E, Langmuir C H, 2004. Timing of volcanism along the northern East Pacific Rise based on paleointensity experiments on basaltic glass. J Geophys Res, 109: B04104, doi:10.1029/2003KB002672.

Eruptive History

Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
0050 BCE ± 1000 years Unknown Confirmed 0 Magnetism

The Global Volcanism Program has no synonyms or subfeatures listed for Northern EPR-Segment RO3.

The Global Volcanism Program has no photographs available for Northern EPR-Segment RO3.

Smithsonian Sample Collections Database

There are no samples for Northern EPR-Segment RO3 in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites

Large Eruptions of Northern EPR-Segment RO3 Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
MODVOLC - HIGP MODIS Thermal Alert System Using infrared satellite Moderate Resolution Imaging Spectroradiometer (MODIS) data, scientists at the Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, developed an automated system called MODVOLC to map thermal hot-spots in near real time. For each MODIS image, the algorithm automatically scans each 1 km pixel within it to check for high-temperature hot-spots. When one is found the date, time, location, and intensity are recorded. MODIS looks at every square km of the Earth every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows at least four hot-spot observations every two days. Each day updated global maps are compiled to display the locations of all hot spots detected in the previous 24 hours. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales.
MIROVA Middle InfraRed Observation of Volcanic Activity (MIROVA) is a near real time volcanic hot-spot detection system based on the analysis of MODIS (Moderate Resolution Imaging Spectroradiometer) data. In particular, MIROVA uses the Middle InfraRed Radiation (MIR), measured over target volcanoes, in order to detect, locate and measure the heat radiation sourced from volcanic activity.