Graciosa

Graciosa (Portugal) is a stratovolcano. It rises to 402 m above sea level. The GVP records 1 confirmed eruption in the Holocene, the latest in 1,950 BCE.

Elevation: 402 m
Last eruption: 1,950 BCE
Confirmed eruptions: 1
Max VEI: —
Country: Portugal
Location: 39.02° N, 27.97° W
Region (GVP): Azores-Terceira Rift Volcanic Province
GVP type: Stratovolcano
Tectonic setting: Rift zone / Oceanic crust (< 15 km)
Main rock type: Basalt / Picro-Basalt

Show on the timeline GVP entry ↗

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
1,950 BCE ± 1,400 years	—	?	San Tamao · Isotopic: Ar/Ar

Data: Global Volcanism Program, Smithsonian Institution (#382040)