San Jorge

Google Earth Placemark
  • Portugal
  • Azores
  • Fissure vent
  • 1907
  • Country
  • Subregion Name
  • Volcano Type
  • Last Known Eruption
  • 1053 m
    3454 ft
  • 38.650°
  • -28.080°
  • Elevation
  •  
  • Latitude
  • Longitude

There are no activity reports for San Jorge.



 Available Weekly Reports


There are no Weekly Reports available for San Jorge.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
[ 1964 Feb 18 ] [ Unknown ] Uncertain 0   Off SW coast
1907 Unknown Confirmed 0 Historical
1902 May 7 1902 May 8 Confirmed 0 Historical Subm. vent ca. 20 km SW of Terceira
1808 May 1 1808 Jun 10 Confirmed 1 Historical Sao Jorge
1800 Jun 24 1800 Jun 25 Confirmed 2 Historical Subm. vent ca. 20 km SW of Terceira
1757 Jul 9 1757 Jul 10 Confirmed 0 Historical Off south coast of Sao Jorge
1580 May 1 1580 Aug 30 (?) Confirmed 3 Historical Sao Jorge (SW side)

The remarkably linear island of San Jorge (Sao Jorge) is 54 km long and only 5 km wide. It was formed by fissure-fed eruptions beginning in the eastern part of the island. The western two-thirds of dominantly basaltic San Jorge contains youthful, fissure-fed lava flows resembling those on neighboring Pico Island. Subaerial lava flows issued from three locations above the south-central coast during 1580, producing lava flows that reached the sea. In 1808 a series of explosions took place from vents along the south-central crest of the island; one of these fed a lava flow that also reached the southern coast. Submarine eruptions were reported on several occasions from vents off the southern and SW coasts.