Ruby

Ruby (Northern Mariana Islands) is a stratovolcano. It rises to −174 m above sea level. The GVP records 3 confirmed eruptions in the Holocene, the latest in 2023.

Elevation: −174 m
Last eruption: 2023
Confirmed eruptions: 3
Max VEI: 1
Country: Northern Mariana Islands
Location: 15.61° N, 145.57° E
Region (GVP): Mariana Volcanic Arc
GVP type: Stratovolcano
Tectonic setting: Subduction zone / Crustal thickness unknown
Main rock type: Basalt / Picro-Basalt

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Other volcanoes and strong earthquakes within 300 km

Eruption history

VEI – Volcanic Explosivity Index: 0 = lava outpouring, 4 = like Eyjafjallajökull 2010, 6 = like Pinatubo 1991, 7 = like Tambora 1815. The scale is logarithmic – each step is about 10 times more material.

Start	End	VEI	Vent and dating
14 September 2023	15 September 2023	1	Observations: Reported
11 October 1995	25 October 1995	1	Observations: Reported
21 April 1966	16 May 1966	1	Observations: Hydrophonic

Data: Global Volcanism Program, Smithsonian Institution (#284202)